Consulta: subjectFacets:"Selectivity"
Registros recuperados: 57
Data/hora: 12/06/2024 05:40:25

Etude et mise au point d'un chalut muni d'une grille sélective à langoustine (Campagne selmerl 2, juin 2002 )
Provedor de dados: 5
Autores: Morandeau, Fabien; Meillat, Marc.
Poursuite des  essais de mise au point d'une grille sélective à langoustine des mois avril  et mai 2002. Des chaluts jumeaux sont utilisés afin de comparer le dispositif à tester. La zone couverte concerne la pêcherie langoustine et merlu dans le sud ouest des îles Glénan et l'ouest de l'île de Groix. La période  est le mois de juin, époque favorable pour les espèces mentionnées ci-dessus. Deux nouvelles grilles bizeautées ont été réalisée par le laboratoire matériaux et structure  du centre IFREMER  de Brest . Les premiers résultats sont négatifs en ce qui concerne le «tri» de la langoustine effectué par la petite grille souple bizeautée .
Tipo: Text
Palavras-chave: Breizline; Codend; Nephrops grid; Grid; Selectivity; Fishing; Chaussettes; Polyéthylène; Breizline; Cul de chalut; Grille à langoustines; Grille; Sélectivité; Pêche.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-6758.pdf

Preliminary results of a trawl fitted with a selective grid for the fishery of benthic species from Celtic Sea and Bay of Biscay
Provedor de dados: 5
Autores: Meillat, Marc; Dupouy, Herve; Bavouzet, Gerard; Kergoat, B.; Morandeau, Fabien; Gaudou, Olivier; Vacherot, Jean-philippe.
The fishery for benthic species (Monkfish, Megrim, Rays, etc ... ) represents for the surrounder countries of the Celtic Sea and the Bay of Biscaye one of the most important activities . An estimate of the discards of the main species resulting from the sorting practice onboard of the trawlers participating in this fishery was made in 1985 and 1991. it was concluded that an important quantity of juveniles of Rays, Megrim and Monkfish are discarded each year causing an important mortality. The aim of the present paper is to present the preliminary results of a selectivity grid fixed on a bottom trawl to limit as possible the discards. Three different grids were tested at sea during surveys with different results. The major problem is due to difference in...
Tipo: Text
Palavras-chave: Chalut sélectif; Grille; Mer Celtique; Golfe de Gascogne; Baudroies; Sardines; Raies; Selectivity; Grid; Trawl; Celtic Sea; Bay of Biscaye; Monkfish; Megrim; Rays.
Ano: 1991
URL: https://archimer.ifremer.fr/doc/00394/50567/51258.pdf

Caractérisation empirique et détaillée des captures : Contribution à l'approche écosystémique des pêches
Provedor de dados: 5
Autores: Fauconnet, Laurence.
The ecosystem approach of sheries requires to rethink sheries management at integrated scales. Knowledge on shing pressure at the community level remains limited while pressure is the lever by which management operates. This work aims at characterizing in detail catches, that is indirectly shing pressure, and to link its components to different management objectives. For doing so, this work relies on analyses of at-sea observer data. The ecosystem approach of sheries requires to rethink sheries management at integrated scales. Knowledge on shing pressure at the community level remains limited while pressure is the lever by which management operates. This work aims at characterizing in detail catches, that is indirectly shing pressure, and to link its...
Tipo: Text
Palavras-chave: Pression de peche; Metriques de diversite; Rejets; Communautes marines; Gestion ecosystemique des peches; Selectivite; Observations a bord des navires de peche professionnelle; Comparaison d'engins; Analyses multivariees.; Shing pressure; Diversity metrics; Discards; Marine communities; Ecosystem approach to fisheries; Selectivity; Observations onboard professionnal fishing vessels; Gear comparison; Multivariate analyses.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00256/36717/35331.pdf

High prey-predator size ratios and unselective feeding in copepods: A seasonal comparison of five species with contrasting feeding modes
Provedor de dados: 5
Autores: Djeghri, Nicolas; Atkinson, Angus; Fileman, Elaine S.; Harmer, Rachel A.; Widdicombe, Claire E.; Mcevoy, Andrea J.; Cornwell, Louise; Mayor, Daniel J.
There has been an upsurge of interest in trait-based approaches to zooplankton, modelling the seasonal changes in the feeding modes of zooplankton in relation to phytoplankton traits such as size or motility. We examined this link at two English Channel plankton monitoring sites south of Plymouth (L4 and El). At L4 there was a general transition from diatoms in spring to motile microplankton in summer and autumn, but this was not mirrored in the succession of copepod feeding traits; for example the ambushing Oithona similis dominated during the spring diatom bloom. At nearby El we measured seasonality of food and grazers, finding strong variation between 2014 and 2015 but overall low mesozooplankton biomass (median 4.5 mg C m(-3)). We also made a seasonal...
Tipo: Text
Palavras-chave: Copepod; Zooplankton biomass; Feeding; Selectivity; Intraguild predation; Predator-prey size ratio; Western Channel Observatory; Sloppy feeding.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00616/72783/83484.pdf

Optimal Selectivity and Effort Cost A Simple Bioeconomic Model with an Application to the Bay of Biscay Nephrops Fishery
Provedor de dados: 5
Autores: Macher, Claire; Boncoeur, Jean.
This article investigates the relationship between optimal gear selectivity and effort cost in the fishing industry We first show that optimal selectivity depends negatively on the level of effort cost, but that this relationship is not continuous. Optimal selectivity switches when real effort cost goes beyond a certain level, and this switch induces a non-marginal reduction in the level of fishing effort. In the second part of this article, we shoot, that the current level of real effort cost in the Nephrops fishery of the Bay of Biscay is far below the switch point, which makes high selectivity optimal. The discrepancy between optimal and current selectivity may be explained by the state of the fishery management and also by the fact that selectivity is...
Tipo: Text
Palavras-chave: Selectivity; Effort; Technical measure; Management tradeoff; Nephrops fishery; Bay of Biscay; Bio-economic model; Social and private benefits and costs; Fuel costs.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12232/9279.pdf

The effects of trawl codend mesh size selectivity on the length composition of catches of pandora, Pagellus erythrinus L. 1758 in the shelf area of the Montenegrin coast (South Adriatic)
Provedor de dados: 5
Autores: Joksimovic, Aleksandar; Regner, Slobodan; Sacchi, Jacques.
Selectivity curves of pandora (Pagellus erythrinus, L. 1758) have been estimated in the area of the Montenegrin shelf (South Adriatic), for trawls with bar mesh sizes of 13.5, 16.1, 17.5, 22 and 35 mm (according to national legislation in Montenegro bar mesh size is measured from knot to knot which is, according to Commission Regulation (EC) No. 129/2003, stretched mesh size divided by 2). Although the existing national legislation prescribes that the minimum mesh size of the trawl be not smaller than 20 mm, trawls with forbidden mesh sizes are often used in this area. Results obtained showed that meshes smaller than 20 mm (13.5 mm, 16.1 mm, 17.5 mm) catch large numbers of immature individuals, since the length of 50% retention (L50%) for all these meshes...
Tipo: Text
Palavras-chave: Pagellus erythrinus; Trawl mesh size; Selectivity; Montenegrin shelf (South Adriatic).
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00020/13134/10177.pdf

Spectres alimentaires des larves de sparides en conditions contrôlées.Sélectivité spécifique de la daurade Sparus aurata
Provedor de dados: 5
Autores: Kentouri, Maroudio; Divanach, Pascal.
Tipo: Text
Palavras-chave: Sparus aurata; Larves de sparides; Spectres alimentaires; Selectivite; Sparus aurata; Sparid larvae; Food range; Selectivity.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00150/26125/24304.pdf

Projet CELSELEC. Amélioration de la sélectivité des chalutiers hauturiers en mer Celtique
Provedor de dados: 5
Autores: Lamothe, Julien; Larnaud, Pascal; Fiche, Marion; Robert, Marianne; Morandeau, Fabien; Vacherot, Jean-philippe; Scavinner, Marion; Simon, Julien.
In the context of the new European Common Fisheries Policy and in particular the Landing Obligation, this report synthesizes the trials which were carried out between 2014 and 2016 on French bottom trawlers operating in the Celtic Sea and Western Channel, to decrease their discards. All the detail of the experiments and their results are attached in the voluminous appendices. After a state of the art and various workshops organized in partnership between fishermen, equipment manufacturers and scientists, 3 basic devices were selected for the trials, according to the main fisheries:  - 100 mm square meshes cylinder - SMC - (in addition to the mandatory 100mm and 120 mm square mesh panels - SMP) with or without scaring floats ;  - Extension + codend in...
Tipo: Text
Palavras-chave: Sélectivité; Mer Celtique; Cylindre à mailles carrées; T90; Grille à baudroie; Rejets; Églefin; Merlan; Sanglier; Selectivity; Celtic Sea; Square mesh cylinder; T90; Monkfish grid; Discards; Haddock; Whiting; Boarfish.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00403/51488/52084.pdf

Different means contributing to anchored FAD's fishing selectivity in the Lesser Antilles
Provedor de dados: 5
Autores: Reynal, Lionel; Guyader, Olivier; Pau, Cedric; Mathieu, Heloise; Dromer, Clement.
In order to improve the sustainable development of FADs fishing, it is important to reduce the capture of juveniles or species that need a decrease in fishing effort, temporarily or definitively. Through previous statistics data coming from commercial fishing trips and new experimental fishing trips, we compared different gears and techniques selectivity for the species and the size of the capture around FADs. We also compared different type of bait used, the best hours to fish for better productivity and to target adults. Finally we look at the influence of the FAD distance from shore. We observed that fishers’ strategies have a critical influence on FADs setting and targeted species. The further the FAD is deployed and the better yield the fisherman...
Tipo: Text
Palavras-chave: Anchored FAD; Artisanal and small scale fishing; Selectivity.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00230/34091/32527.pdf

Effect of pelagic longline bait type on species selectivity: a global synthesis of evidence
Provedor de dados: 5
Autores: Gilman, Eric; Chaloupka, Milani; Bach, Pascal; Fennell, Hannah; Hall, Martin; Musyl, Michael; Piovano, Susanna; Poisson, Francois; Song, Liming.
Fisheries can profoundly affect bycatch species with ‘slow’ life history traits. Managing bait type offers one tool to control species selectivity. Different species and sizes of marine predators have different prey, and hence bait, preferences. This preference is a function of a bait’s chemical, visual, acoustic and textural characteristics and size, and for seabirds the effect on hook sink rate is also important. We conducted a global meta-analysis of existing estimates of the relative risk of capture on different pelagic longline baits. We applied a Bayesian random effects meta-analytic regression modelling approach to estimate overall expected bait-specific catch rates. For blue shark and marine turtles, there were 34% (95% HDI: 4–59%) and 60% (95%...
Tipo: Text
Palavras-chave: Bait; Bycatch; Longline; Mitigation; Selectivity; Tuna.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00643/75536/76441.pdf

Development of a model for flexural rigidity of fishing net with a spring mass approach and its inverse identification by metaheuristic parametric optimization.
Provedor de dados: 5
Autores: Vincent, Benoit; Di Cesare, Noëlie; Simon, Julien.
The assessment of mesh resistance to opening is a key factor when coming to fishing gear design to study or optimize the fishing selectivity process. Different authors proposed methodologies to achieve twine flexural rigidity identification and mesh opening angle at rest. Their experimental protocols could rely on complex installations and instrumentation, and identification needs dedicated models or software with possible important set up time. Sometimes, different flexural rigidity and rest angle values for a given netting type were proposed depending on identification or experimental conditions, leading to difficulties to choose a value for implementation in netting structures simulation software. The new methodology proposed in this article is based on...
Tipo: Text
Palavras-chave: Fishing net mechanics; Twine flexural rigidity; Numerical simulation; Selectivity; Fishing.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00613/72541/71615.pdf

From discard ban to exemption: How can gear technology help reduce catches of undersized Nephrops and hake in the Bay of Biscay trawling fleet?
Provedor de dados: 5
Autores: Vogel, Camille; Kopp, Dorothee; Mehault, Sonia.
On January 1st, 2016, the French mixed Nephrops and hake fishery of the Grande Vasière, an area located in the Bay of Biscay, fell under the discard ban implemented as part of the new European Common Fisheries Policy. The fleet records historically high levels of discard despite numerous gear selectivity studies. Together with high discards survival, new technological solutions to minimize catches of undersized individuals could justify local exemptions from the discard ban. Our study focuses on the effects of two selective devices, a square mesh cylinder (SMC) and a grid, on the escapement of undersized individuals and discard reduction. Relative catch probability of the modified gear compared with the traditional gear was modelled using the catch...
Tipo: Text
Palavras-chave: Nephrops; European hake; Discard ban; Gear technology; Catch comparison; Selectivity.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00356/46717/46906.pdf

Engineering development of flexible selectivity grids for Nephrops
Provedor de dados: 5
Autores: Loaec, Henri; Morandeau, Fabien; Meillat, Marc; Davies, Peter.
There are different approaches to selectivity, including increasing cod-end mesh size, square mesh panels and rigid grids. Selectivity grids have traditionally been produced to be as rigid as possible to maintain spacing but this can result in heavy, expensive grids, handling problems and brittleness. This paper presents an alternative approach using flexible polyurethane polymers to produce lightweight inexpensive grids with much improved damage tolerance and ease of handling, which also possess interesting selectivity characteristics. The material selection, design and development tests are described first, then preliminary sea trial results are presented. A flexible grid with a 20 mm spacing between bars performed successfully and enabled a reduction in...
Tipo: Text
Palavras-chave: Damage resistance; Polyurethane; Nephrops; Grid; Size selection; By catch; Selectivity.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1690.pdf

Bycatch and discards: from improved knowledge to mitigation programmes Introduction
Provedor de dados: 5
Autores: Rochet, Marie-joelle; Catchpole, Tom; Cadrin, Steve.
Discarding is considered by many as an important problem in world fisheries. In many regions, data collection onboard commercial vessels has intensified, and the understanding of both human and ecological drivers of discards is improving quickly. Discarding patterns vary widely across regions, fisheries, gears, and species. Fishers' responses to regulations and markets explain these complex patterns, on top of resource availability partly driven by environmental fluctuations. This expanded knowledge base provides an appropriate basis for discussing the discard mitigation measures proposed in various settings. In September 2012, a theme session was convened at the ICES Annual Science Conference in Bergen, Norway, to discuss these issues. This themed set of...
Tipo: Text
Palavras-chave: Bycatch and discards; Catch quotas; Compliance; Landing obligation; Landing quotas; Market incentives; Minimum landing sizes; Onboard observer programmes; Selectivity.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00202/31353/29911.pdf

A bio-economic analysis of experimental selective devices in the Norway lobster (Nephrops norvegicus) fishery in the Bay of Biscay
Provedor de dados: 5
Autores: Raveau, Adriana; Macher, Claire; Mehault, Sonia; Merzereaud, Mathieu; Le Grand, Christelle; Guyader, Olivier; Bertignac, Michel; Fifas, Spyros; Guillen Garcia, Jordi.
Several fleets with various fishing strategies operate as a mixed fishery in the Bay of Biscay. Among the main fleets, bottom trawlers target Norway lobster (Nephrops norvegicus) and, together with gillnetters, they also catch hake (Merluccius merluccius). Trawling leads to average-size catches that are below the minimum landing size (MLS); such catches are discarded since they cannot be sold. These discards result in negative impacts on stock renewal, as most of them do not survive. This also results in an economic loss for both bottom trawlers and gillnetters since these discards represent a future loss of rent. This study, based on the 2009 and 2010 selectivity experiments at sea, assesses the short- and long-term bio-economic impacts of four...
Tipo: Text
Palavras-chave: Demersal trawl fishery; Bio-economic analysis; Selectivity; Simulation; Selective device; Nephrops norvegicus; Merluccius merluccius; Atlantic Ocean.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00110/22135/19774.pdf

The ABTS-HRP System as an Alternative Method to RRDE for the Determination of the Selectivity of the Oxygen Reduction Reaction
Provedor de dados: 5
Autores: Cheng, Xi; Challier, Lylian; Etcheberry, Arnaud; Noel, Vincent; Perez, Henri.
A 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS)-H2O2-peroxidase system was involved to study the oxygen reduction reaction (ORR) selectivity in acid medium. The average number of electron transferred per oxygen molecule (n) was calculated by measuring the quantity of H2O2 produced during the oxygen reduction reaction, taking advantage of the high activity of peroxidase enzyme coupled with the ABTS chromogen. The method was validated using electrode materials for which the electron pathway is established. It is simple, accurate and can be used on various kind of electrode structure.
Tipo: Text
Palavras-chave: ORR; Selectivity; Hydrogen peroxide; Porous electrodes.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00692/80365/83471.pdf

A catch curve analysis for east Atlantic and Mediterranean bluefin tuna
Provedor de dados: 5
Autores: Kell, Laurence; Bonhommeau, Sylvain; Fromentin, Jean-marc.
A catch-curve analysis using catch-at-age (CAA) data is performed to evaluate recent changes in selection pattern of the eastern Atlantic and Mediterranean bluefin tuna fishery. This was done in order to detect changes following the implementation of the Recovery Plan.
Tipo: Text
Palavras-chave: Bluefin tuna; Catch curves; Management; Selectivity; Stock assessment.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00191/30272/28732.pdf

Validation du TED et essais d'une nouvelle grille sélective dans la pêcherie crevettière de Guyane2007
Provedor de dados: 5
Autores: Meillat, Marc; Morandeau, Fabien; Achoun, Joseph; Barthelemy, Patricia.
This work is in line with the fishing technology section of the DUHAL (Durability of Halieutic activities) action. It aims to reduce the "side" catches associated with shrimp fishing in French Guyana. Shrimp trawling is indeed considered as one of the fishing activities which generates the most waste. The campaign carried out in November/December 2006 had lead to the following conclusions [...]
Tipo: Text
Palavras-chave: Bycatch Reducing Device; Radial Escape Section; Duhal; Survey campaign; Shrimp; Selectivity; Grille Nordmore; Mailles carrées; BRD; RES; TED; Duhal; Grille; Campagne à la mer; Crevette; Sélectivité.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/rapport-6683.pdf

Amélioration de la sélectivité des chalutiers Pêcherie multispécifique – Manche - Mer du Nord (selecmer)
Provedor de dados: 5
Autores: Leonardi, Sophie; Rubin, Alex; Meillat, Marc; Coppin, Franck; Delpech, Jean-paul; Morandeau, Fabien; Larnaud, Pascal.
Ce rapport fait la synthèse des travaux réalisés en 2008 et en 2009 au cours du programme Selecmer. Celui-ci, réalisé à l'initiative des professionnels de la pêche en partenariat avec l'Ifremer, avait pour objectif de travailler à améliorer la sélectivité du chalut de fond qu'ils utilisent afin de diminuer les rejets des individus hors-tailles1, en particulier pour le merlan, tout en limitant les pertes commerciales immédiates. Une première phase a consisté à tester l'efficacité de fenêtres à mailles carrées. La deuxième phase a eu pour objectif de développer une grille sélective. Des essais en bassin et des campagnes vidéo en mer ont permis d'apporter des ajustements aux dispositifs sélectifs. L'ensemble des essais de sélectivité à bord des navires de...
Tipo: Text
Palavras-chave: Professional fishermen; Square mehs; Flume tank; Selective grid; North Sea; Channel; Bottom trawl; Selectivity; Fishing; Professionnels; Mailles carrées; Campagnes à la mer; Bassin d'essais; Grille sélective; Mer du Nord; Manche; Chalut de fond; Sélectivité; Pêche.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/rapport-6776.pdf

A cost-benefit analysis of improving trawl selectivity in the case of discards: The Nephrops norvegicus fishery in the Bay of Biscay
Provedor de dados: 5
Autores: Macher, Claire; Guyader, Olivier; Talidec, Catherine; Bertignac, Michel.
The Nephrops trawl fishery is one of the most important fisheries in the Bay of Biscay. The fishery management essentially relies on conservation measures, a total at I owed catch (TAC) for Nephrops together with a mini mum landing size (MLS) and minimum trawl mesh size (70 mm stretched mesh). These measures have failed to prevent high discard levels of many species that characterize the fishery. Nephrops trawlers thus discard about half of their Nephrops catches in numbers (a third in weight) of which only 30% survive. Nephrops discards mainly occur in younger Nephrops age groups below the MLS. This is a waste for the already overexploited Nephrops stock as well as for the fleet. Based on a bio-economic simulation model, the paper analyses the...
Tipo: Text
Palavras-chave: Fisheries management; Discards; Selectivity; Cost benefit analysis; Bio economic simulations; Nephrops norvegicus.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4478.pdf

Compatibility of Beauveria bassiana with acaricides
Provedor de dados: 82
Autores: Oliveira,Renato C. de; Neves,Pedro M.O.J.
The in vitro compatibility of the entomopathogenic fungus Beauveria bassiana (Bals.) Vuil. with 12 acaricide formulations was evaluated. The active ingredients Clorfenapyr, Fenpyroximate, Amitraz, Acrinathrin, Hexythiazox, Abamectin, Pyridine, Dimethoate, Pyridaphethion, Fenbutatin Oxide, Azocyclotin and Cyhexatin were tested in three different concentrations (mean concentration - MC, half MC and twice the MC). The formulations tested affected conidial germination, vegetative growth and sporulation of the fungus in different levels. The formulations more compatible with B. bassiana were Avermectin and the pyrethroids. The acaricides belonging to the organophosphate and organostanic chemical groups, however, drastically affected conidial germination as well...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Selectivity; Fungitoxicity; Entomopathogenic fungus; IPM.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000300013

Compatibility of the fungus Beauveria Bassiana (Bals.) Vuill. (Deuteromycetes) with extracts of neem seeds and leaves and the emulsible oil
Provedor de dados: 82
Autores: Depieri,Rogério A.; Martinez,Sueli S.; Menezes Jr.,Ayres O.
The compatibility of a commercial formula of emulsible neem oil (Azadirachta indica A. Juss.) and of aqueous extracts of neem seeds and leaves with Beauveria bassiana (Bals.) Vuill. was evaluated in vitro. Three experiments were conducted to evaluate the effect of each product on the fungus vegetative growth and on conidia production and viability. The products were incorporated to a culture medium (BDA+E) and distributed into petri dishes, in the following concentrations: 0.15%; 1.5% and 15% (leaf aqueous extract), 1%; 2% and 4% (seed aqueous extract) and 0.5%; 1% and 1.5% (emulsible oil). Vegetative growth and conidia production were the basis for characterization of the aqueous extracts of seeds and leaves and of the emulsible oil, using the T...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Azadirachta indica; Selectivity; Biological control; Entomopathogenic fungus.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000400010

Diel variation in the ascent of fishes up an experimental fish ladder at Itaipu Reservoir: fish size, reproductive stage and taxonomic group influences
Provedor de dados: 83
Autores: Fernandez,Domingo Rodriguez; Agostinho,Angelo Antonio; Bini,Luis Mauricio; Pelicice,Fernando Mayer.
In this study, we evaluated the fish ascent in the experimental ladder at Itaipu Reservoir (Paraná State, Brazil), in relation to diel variation, fish size, reproductive stages and species composition. The study was carried out from October, 1995 to February, 1996 and from November, 1996 to January, 1997 at two points on the ladder (boxes at heights of 10 and 27 m). Twenty-two species were recorded, and Prochilodus lineatus, Pimelodus maculatus, Leporinus obtusidens, Schizodon borellii and Leporinus friderici accounted for 86.6 % of the total catch. Fish length did not differ between diel periods and boxes. On the other hand, fish abundance of the main species was significantly influenced by box position, reproductive stage and diel period. The higher box...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish migration; Fish passage; Selectivity; Non-reproductive fish; Management.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000200016

SELECTION OF HERBICIDES TARGETING THE USE IN CROP SYSTEMS CULTIVATED WITH SHOWY CROTALARIA
Provedor de dados: 87
Autores: BRAZ,G. B. P; OLIVEIRA JR,R. S; CONSTANTIN,J.; TAKANO,H. K.; CHASE,C. A.; FORNAZZA,F. G. F.; RAIMONDI,R. T.
ABSTRACT The increase in the area planted with Crotalaria spectabilishas occurred by several factors, highlighting the potential to reduce the nematodes, nitrogen fixation and the high production of biomass. By becoming a species sown as a crop, it is necessary to control the weeds that coexist with showy crotalaria. This change in the use of this crop creates the possibility of this specie becoming a weed. The aim of this study was to assess the potential use of herbicides applied in preemergence and postemergence of C.spectabilisfor different purposes (control of volunteer and selectivity plants). Three experiments were installed in a greenhouse (two with herbicides applied in preemergence - in soils with distinct textural categories; and one experiment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Selectivity; Control of volunteer plants; Crop rotation; Crotalaria spectabilis.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000300521

Associations Between Herbicides and Glyphosate in Agronomic Performance of RR2 Intact Soybean
Provedor de dados: 87
Autores: CESCO,V.J.S.; ALBRECHT,A.J.P.; RODRIGUES,D.M.; KRENCHINSKI,F.H.; ALBRECHT,L.P.
ABSTRACT: The Roundup Ready (RR) soybean was developed for weed control with the use of glyphosate. Some herbicide combinations with glyphosate has been used in weed control and some effects of this practice may be undesirable in the agronomic performance of RR soybean. The present study evaluated the agronomic performance of RR2 intact soybean applied with associations between herbicides and glyphosate at post-emergence, in two experiments conducted in two municipalities in the state of Paraná, Palotina and Marechal Cândido Rondon. This experiment consisted of seven treatments in a randomized block design with four replications, totaling 28 plots for each municipality. The cultivar used in both experiments was Monsoy 6210 Intact RR2 IPROTM. The variables...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Susceptibility; Selectivity; Phytotoxicity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100212

Biochemical and Physiological Changes in Rice Plants Due to the Application of Herbicides1
Provedor de dados: 87
Autores: LANGARO,A.C.; AGOSTINETTO,D.; OLIVEIRA,C.; SILVA,J.D.G.; BRUNO,M.S.
ABSTRACT The application of herbicides, even if selective, can cause biochemical and physiological changes, resulting in oxidative stress. This stress comes from the accumulation of reactive oxygen species produced due to exposure to the herbicide. However, plants have developed defense strategies, which can be enzymatic or non-enzymatic. The objective of this study was to evaluate the morphological and metabolic changes such as photosynthetic parameters, oxidative damage and antioxidant enzyme activity of rice plants after applying herbicides. For this, a study was conducted in a greenhouse and laboratory and the treatments consisted of application of imazapic + imazapyr, quinclorac, bentazon, cyhalofop-butyl, penoxsulan, bispyribac-sodium and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Oxidative stress; Lipid peroxidation; Selectivity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000200277

Aryloxyphenoxypropionates tolerant and non-tolerant corn: plant-back interval after acetyl-coA-carboxylase inhibitors applications
Provedor de dados: 87
Autores: R. Mendes,Rafael; M. Franchini,Luiz H.; R. Lucio,Felipe; S. Zobiole,Luiz H.; S. Oliveira Jr.,Rubem.
Abstract  Background:  The application of Acetyl CoA carboxylase (ACCase) inhibitors prior to sowing of grass crops may result in crop damage due to residual effect of these herbicides in soil. The hypotheses was that different corn hybrids and ACCase herbicides can result in different plant-back intervals after burndown treatments.  Objective:  This work was planned to determine safe plant-back periods for three corn hybrids where ACCase herbicides clethodim and haloxyfop-methyl are applied.  Methods:  Herbicides were sprayed at 21, 14, 7, 2 and 0 days before sowing (DBS) at 192 g a.i. ha-1 (clethodim) and 120 g a.i. ha-1 (haloxyfop-methyl). Individual experiments were carried out with three hybrids: KWS9110 and 2B587 with glyphosate and glufosinate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Residual; Clethodim; Haloxyfop-methyl; Selectivity; ACCase-inhibitors.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100312

Chemical control of Pileamicrophylla in cattleya seedlings (Cattleyatenebrosa x Cattleyaleopoldy)
Provedor de dados: 87
Autores: Battistus,A.G.; Klein,J.; Costa,N.V.; Guimarães,V.F.; Hoffmann,V.
Species of the orchidaceae family are grown for marketing flowers and among them the genus Cattleya stands out. However, due to its slow growth, the substrate is subjected to weed infestation. Therefore, this study aims to evaluate the selectivity and efficiency of herbicides in controlling Pilea microphylla in Cattleya orchid seedlings (Cattleya tenebrosa x Cattleya leopoldy). We used a completely randomized design with four replications. The evaluated herbicides were oxyfluorfen (0, 120, 240 and 480 g ha-1), flumioxazin (0, 12.5, 25 and 40 g ha-1), nicosulfuron (0, 20, 40 and 80 g ha-1) mesotrione (0, 96, 144 and 192 g ha-1), clethodim (0, 60, 84 and 108 g ha-1) and metsulfuron-methyl (0, 1.2, 1.8 and 2.4 g ha-1). At post-emergence applying time, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Weed; Herbicide; Floriculture; Selectivity.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400015

DIFFERENTIAL TOLERANCE OF SUGARCANE CULTIVARS TO CLOMAZONE
Provedor de dados: 87
Autores: BARCELLOS JÚNIOR,L.H.; PEREIRA,G.A.M.; GONÇALVES,V.A.; MATOS,C.C.; SILVA,A.A.
ABSTRACT Weed control is one of the most relevant costs of sugarcane production. If weeds are not controlled at the right time, the productivity and longevity of sugarcane plantations are reduced. In this crop, chemical control is the most used method, since it is efficient and it has a lower cost. Differentiated tolerance of sugarcane cultivars to the herbicide clomazone has been observed in the fields. However, there is no scientific evidence of this effect on the productivity of crops. This study evaluated the effects of clomazone on three sugarcane cultivars (RB966928, RB93579 and RB867515). Herbicide application was performed 40 days after the emergence of sugarcane plants and 7, 14, 21 and 28 days after the application, the toxicity caused by the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Selectivity; Saccharum spp.; Herbicide.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100267

Changes in Photosynthesis and Oxidative Stress in Wheat Plants Submmited to Herbicides Application
Provedor de dados: 87
Autores: AGOSTINETTO,D.; PERBONI,L.T.; LANGARO,A.C.; GOMES,J.; FRAGA,D.S.; FRANCO,J.J.
The use of herbicides, even in tolerant crops, can cause stress evidenced by increase phytotoxicity affecting growth and development. The objectives of this study were to evaluate herbicides effect from different mechanisms of action in photosynthetic and oxidative stress parameters, as well visual phytotoxicity and wild radish control in wheat crop, cultivar Quartzo. Two trials were conducted where the first one evaluated the photosynthetic parameters on wheat plants in two seasons collection, following the application of herbicides bentazon, clodinafop, iodosulfuron, metribuzin, metsulfuron and 2,4-D; and the second one evaluated wild radish (Raphanus sativus) control, wheat phytotoxicity and yield due to bentazon, iodosulfuron, metribuzin, metsulfuron...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Selectivity; ROS; Antioxidant enzymes.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100001

Influence of Nitrogen Fertilization on Herbicide Selectivity in Rice
Provedor de dados: 87
Autores: LANGARO,A.C.; AGOSTINETTO,D.; OLIVEIRA,C.; FRANCO,J.J.; ZANDONÁ,R.R.; VARGAS,L.
ABSTRACT: Chemical weed control and nitrogen fertilization are common practices in irrigated rice crops. Nitrogen is an essential element for growth and development of plants and may influence herbicide selectivity. In this study, herbicide selectivity was evaluated according to nitrogen application time in irrigated rice crops. The experiment was conducted in the field in a split-plot design with four replications. Treatments were arranged in a factorial scheme: factor A consisted of different nitrogen application times (without nitrogen, all nitrogen applied before flooding, half of the nitrogen rate applied before flooding and the other half after flooding, all nitrogen applied after flooding); factor B consisted of the application of the herbicides...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Nitrogen; Selectivity; Weeds.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100318

Selectivity of Imazapic + Imazapyr Herbicides on Irrigated Rice as Affected by Seed Treatment with Dietholate and Clomazone Applied in Preemergence
Provedor de dados: 87
Autores: PIVETA,L.B.; PINTO,J.J.O.; AVILA,L.A.; NOLDIN,J.A.; SANTOS,L.O.
ABSTRACT: The use of dietholate seed treatment, as well as the use of preemergence clomazone, can affect the selectivity of the imidazolinones chemical group of postemergence herbicides applied in crops Clearfield™. The aim was to evaluate the morphophysiological effects of a formulated mixture of imazapyr + imazapic applied in postemergence in combination with seed treatment with dietholate and applying in preemergence of clomazone on Avaxi CL rice hybrid cultivar. The experiment was conducted in the agricultural year 2012/13, in a greenhouse. The experimental design was completely randomized in a factorial design with four replications, in which factor A consisted of seed treatment with dietholate and applied clomazone herbicide in preemergence on rice...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Selectivity; Photosynthesis; Chemical control.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100261

Mefenpyr-diethyl action on fenoxaprop-p-ethyl detoxification in wheat varieties
Provedor de dados: 87
Autores: Cataneo,A.C.; Ferreira,L.C.; Mischan,M.M.; Velini,E.D.; Corniani,N.; Cerdeira,A.L.
Safeners protect crops against herbicide injury. The aim of this study was to examine the differential susceptibility of five wheat (Triticum aestivum) varieties to the herbicide fenoxaprop-p-ethyl, as well as the performance of mefenpyr-diethyl on minimizing herbicide injury and on lipid contents. Varieties BRS 49, CD 104, CEP 24, IAPAR 78 and Rubi were sprayed with fenoxaprop-p-ethyl (69 g ha¹), fenoxaprop-p-ethyl + mefenpyr-diethyl (69 g + 18.75 g ha-1), or mefenpyr-diethyl (18.75 g ha-1). Plants were evaluated visually for injury at 7 and 14 days after treatment (DAT). Glutathione S-transferase (GST) activity was assayed in aerial parts at 7 DAT, and lipid content was measured at 14 DAT. Varieties CEP 24, IAPAR 78 and Rubi were more tolerant to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Safener; Triticum aestivum; Selectivity; Glutathione S-transferase; Lipid content.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000200016

How glyphosate may affect transgenic soybean in different soil and phosphorus levels
Provedor de dados: 87
Autores: Casonatto,M.S.; Arantes,S.A.C.M.; Rieger E.A.,; Andrade,E.A.
The technology that employs genetic modifications brought a significant increase in the utilization of glyphosate. Transgenic soybean has been suffering injury, even though it possesses a resistance mechanism to glyphosate. Currently, there are only a few studies on the dynamics of glyphosate in transgenic soybean planted in soils with different textures interacting with phosphorus concentrations. This study focused on assessing the effects of glyphosate in transgenic soybean plants on different types of soil and at different phosphorus levels. The experimental design was completely randomized, in factorial design: 2 x 6 x 3, that being 2 soil types, 6 doses of glyphosate and 3 levels of phosphorus, and four replications. Plants were cultivated for thirty...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus fertilization; Herbicide; Selectivity; Genetic modifications.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400019

Application of Sulfentrazone in Stages of Germination of IAC 90 Cassava Cuttings in Clay Soils and Sandy
Provedor de dados: 87
Autores: Zimmer,J.S.; Ferreira,S.D.; Ramella,J.R.; Rodrigues-Costa,A.C.P.; Costa,N.V.
Weeds interfere dramatically in the productive potential of cassava; however, information regarding herbicides that are selective to crops is still scarce. Thus, the aim in this study was to assess the initial growth of IAC 90 cassava plants after the application of sulfentrazone at different stages of germination of cassava in clayey and sandy soils. Three experiments were simultaneously deployed: the first experiment consisted in the application of sulfentrazone in the non-germinated stage of cassava cuttings; the second one in the stage of germinated cassavas cuttings (0.9 cm shoots); and the third one in applications in the stage of cassava cuttings with buds emerging (6.5 cm shoots and emerging from the soil). For each experiment the experimental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicide; Manihot esculenta; Protox inhibitor; Selectivity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200305

Weed control in young coffee plantations through post emergence herbicide application onto total area
Provedor de dados: 87
Autores: Ronchi,C.P.; Silva,A.A.
This study was carried out to investigate the efficiency of several herbicides under field conditions, by post-emergence application onto the entire area, their effect on the control of weeds in young coffee plantations and commercial coffee and bean intercropping system, as well as on both crops. Seedlings of Coffea arabica cv. Red Catuaí with four to six leaf pairs were transplanted to the field and treated according to conventional agronomic practices. A bean and coffee intercropping system was established by sowing three lines of beans in the coffee inter-rows. At the time the herbicides were sprayed, the coffee plants had six to ten leaf pairs; the bean plants, three leaflets; and the weeds were at an early development stage. Fluazifop-p-butyl and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffea arabica; Phaseolus vulgaris; Intercropping; Selectivity.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582004000400016

Growth inhibitors in turfgrass
Provedor de dados: 87
Autores: March,S.R.; Martins,D.; McElroy,J.S.
Well-maintained lawns are comfortable and safe places for leisure activities and sports practice, and they also bring environmental benefits; for example, they reduce soil exposure to erosion and releases atmospheric CO2, thus reducing the greenhouse effect. However, regardless of the purpose of use or the choice of the plant species to form the lawn, the highest costs involve cutting that is needed to keep the turfgrass at its appropriate height. Successive lawn cutting operations are necessary basically because of the vegetative and reproductive growth of turfgrass which, in Brazil, occurs mainly from October to March. Expenditures with successive mechanical cuttings have fostered the search of alternative procedures to keep lawn plants at appropriate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth regulator; Lawn; Bio-stimulant; Injury; Selectivity; Herbicide.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300025

Rates of Nicosulfuron Applied in Glyphosate-Tolerant and Sulfonylurea-Tolerant Soybean
Provedor de dados: 87
Autores: SILVA,A.F.M.; ALBRECHT,A.J.P.; SILVA,G.S.; KASHIVAQUI,E.S.F.; ALBRECHT,L.P.; VICTORIA FILHO,R.
ABSTRACT: STS cultivars tolerate up to four times higher rates of chlorimuron than those recommended for non-tolerant cultivars, without significant damage. However, few studies position the selectivity of nicosulfuron in STS cultivars. The aim of this study was to assess the selectivity of rates of the herbicide nicosulfuron applied in the post-emergence (V4) of RR/STS soybean. The experiments were conducted in the 2015/16 and 2016/17 seasons in Piracicaba, SP. In the 2016/17 season, the experiment was also conducted in Palotina, PR. Treatments consisted of six rates of the herbicide nicosulfuron (0, 50, 100, 150, 200, and 250 g a.i. ha-1). The experimental design was a randomized block design with four replications. The symptoms of injury were assessed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicide-tolerant crops; ALS inhibitors; Agronomic performance; Selectivity; Glycine max (L.) Merrill.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100209

MAIZE CROP PHYTOTOXICITY IN RESPONSE TO SUB-DOSES OF SULFOMETURON-METHYL
Provedor de dados: 87
Autores: FELISBERTO,P.A.C.; FELISBERTO,G.; RAMOS,A.R.; TIMOSSI,P.C.
ABSTRACT The use of ripeners has been a common practice in the sugarcane culture. The application of these products is often performed through aerial spraying, which increases the chances of drifting of the ripeners- molecules over the surrounding crops, such as maize. In order to study possible phytointoxication on maize caused by sulfometuron-methyl application, a field experiment was conducted to evaluate the effects of sulfometuron-methyl sub doses on maize when applied at the V4 and V8 development stages. The experiment was installed in a randomized block design with four replications. The treatments followed a 2 x 5 factor scheme, with the first factor corresponding to development stages of maize during which the ripener was applied (V4 and V8) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ripener; Selectivity; Zea mays.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100265

Sugarcane Seedlings Influenced by the Management with Herbicides
Provedor de dados: 87
Autores: SILVA,T.P.; AZANIA,C.A.M.; XAVIER,M.A.; PERECIN,D.; VITORINO,R.
ABSTRACT: This research aimed at studying herbicides selectivity on individuals from three sugarcane families after different chemical managements in primary selection fields (F1). On the field, a randomized block design with five replications in a split plot scheme was used. Twelve herbicide treatments were allocated in the plots and the three seedlings families were allocated in the sub-plots. The herbicides treatments were T1- tebuthiuron POST-i + ametryn POST-t; T2- (diuron + hexazinone) POST-i + ametryn POST-t; T3- sulfentrazone POST-i + ametryn POST-t; T4- (diuron + hexazinone) POST-i + metribuzin POST-t; T5- sulfentrazone POST-i + metribuzin POST-t; T6- imazapyr IPP; T7- imazapyr IPP + ametryn POST-t; T8- imazapyr IPP + metribuzin POST-t; T9-...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp.; Breeding; Phytotoxicity; Selectivity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100202

Use of herbicides on turfgrass
Provedor de dados: 87
Autores: McElroy,J.S.; Martins,D.
In crop production, weeds must be controlled so as not to adversely affect crop yield and crop quality. Thus, a low level of weeds infesting a field, in most instances, is not a problem. Except in sod or seed production, turfgrass does not have a yield component. The value of turfgrass is its inherent aesthetic quality and usability. Aesthetic quality is the beauty and value that turfgrass adds to a managed landscape. Usability can be the durability of a sport field, trueness of golf putting green roll, or reduction in soil loss from water runoff or wind. Any weed presence in turfgrass can decrease the aesthetic quality and usability of turfgrass. Utilizing herbicides is the only way to completely control weeds in a turfgrass stand. While it is possible to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Preemergence; Postemergence; Selectivity; Chemical control; Weed.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000200024

Effect of entomopathogens on Africanized Apis mellifera L. (Hymenoptera: Apidae)
Provedor de dados: 92
Autores: Potrich,Michele; Silva,Rita T.L. da; Maia,Fabiana M.C.; Lozano,Everton R.; Rossi,Robson M.; Colombo,Fernanda C.; Tedesco,Flavia G.; Gouvea,Alfredo de.
ABSTRACT This study aimed to evaluate the effect of commercially used entomopathogens on Africanized Apis mellifera L. (Hymenoptera: Apidae). Four bioassays were performed: 1) pulverized entomopathogens on A. mellifera; 2) entomopathogens sprayed on a smooth surface; 3) entomopathogens sprayed on soy leaves; and 4) entomopathogens mixed with candy paste (sugar syrup). Five treatments were prepared: sterile distilled water (control), distilled water sterilized with Tween® 80 (0.01%), and the commercial entomopathogens Metarhizium anisopliae E9 (1.0 × 109 conidia mL−1), Beauveria bassiana PL63 (1.0 × 108 conidia mL−1) and Bacillus thuringiensis var. kurstaki HD-1 (3.0 × 108 spores mL−1). Each treatment consisted of five repetitions, with 20 workers per...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bayesian statistics; Entomopathogenic fungi; Entomopathogenic bacteria; Honeybee; Selectivity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262018000100023

Oxidative stress caused by the use of preemergent herbicides in rice crops
Provedor de dados: 124
Autores: Langaro,Ana Claudia; Agostinetto,Dirceu; Ruchel,Queli; Garcia,Jessica Rodrigues; Perboni,Lais Tessari.
ABSTRACT Among the methods of weed control, stands out chemical control. However, even selective, herbicides can trigger the production of reactive species of oxygen and cause oxidative stress. The aim of the study was to evaluate changes in photosynthetic parameters, oxidative damage, antioxidant enzyme activity and altered metabolism of rice plants after applying pre-emergent herbicides. The experiment was conducted in a greenhouse and herbicides used were oxadiazon, pendimethalin and oxyfluorfen, beyond the control without herbicide. There was a reduction of photosynthetic rate and efficiency of carboxylation, compared to the control, when applied herbicides oxyfluorfen and pendimethalin. The major lipid peroxidation and proline accumulation was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant system; Chemical control; Reactive oxygen species; Selectivity.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000200358

Selectivity of Amblyseius largoensis (Muma) to phytosanitary products used in the protected production of pepper (Capsicum annuum L.)
Provedor de dados: 100
Autores: Montoya,A; Pino,Oriela; Rodríguez,H; Posos,P.
The compatibility of Amblyseius largoensis (Muma) with chemical and biological products used in the protected pepper production was determined in an experiment conducted under controlled conditions. Two to five-day- old gravid females were removed from an arena of A. largoensis on Panonychus citri (McGregor) in the laboratory and placed on a section of a grapefruit (Citrus paradisi Macf var. Marsh) leaf with the same prey in a Petri dish of 14 cm of diameter. The females were sprayed with the maximum doses used in protected cultivation systems of the miticides dicofol, sulphur, and the Lbt-13 strain of Bacillus thurigiensis (Berliner); the insecticides diafentiuron, imidacloprid and cypermethrin+diazinon, and the fungicides mancozeb and metalaxyl+mancozeb....
Tipo: Journal article
Palavras-chave: Amblyseius largoensis; Protected crops; Predatory; Capsicum annuumm; Selectivity.
Ano: 2013
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1010-27522013000100009

Susceptibility of Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidea) to gamma-cyhalothrin under laboratory conditions
Provedor de dados: 63
Autores: Pereira,Alexandre Igor de Azevedo; Ramalho,Francisco de Sousa; Zanuncio,José Cola.
Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) is an important biological control agent of the cotton leafworm [Alabama argillacea (Hübner)] in the cotton crops in Brazil. The use of selective products such as pyrethroids has been emphasized in this agroecosystem. Then, the susceptibility of the predatory stinkbug P. nigrispinus to the pyrethroid insecticide gamma-cyhalothrin was studied in the laboratory. Nymphs and adults of the predator were exposed to seven concentrations of the gamma-cyhalothrin via topical contact and ingestion through treated water. The concentrations studied of this insecticide via topical application were relatively harmless for adults of P. nigrispinus (females: LC50 = 143.5 ppm a.i., and males: LC50 = 145.1 ppm a.i.)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cotton; Biological control; Pyrethroid; Selectivity; Natural enemies.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500012

Leaf anatomy of cassava ( Manihot esculenta Crantz. cv. IAC-12) after herbicides application to control weeds in Minas Gerais, Brazil
Provedor de dados: 109
Autores: Silva,Daniel Valadão; Cabral,Cassia Michelle; Costa,Sarah Stéphane Diamantina da; Souza,Matheus de Freitas; Ferreira,Evander Alves; Braga,Renan Rodrigues; Pereira,Gustavo Antônio Mendes; Santos,and José Barbosa dos.
Abstract Micro-morphological changes precede the appearance of visible damage after herbicide application and are essential in providing data for the safe recommendation in chemical management of weeds. Therefore, the aim of this research was to verify the anatomical changes of leaf tissue caused by application of herbicides in cassava (Manihot esculenta Crantz.cv. IAC-12). A greenhouse experiment was conducted with post-emergence herbicides treatments as follows: nicossulfuron (60 g a.i ha-1), fluazifop (250 g a.i ha-1), fomesafem (250 g a.i ha-1), metribuzin (480 g a.i ha-1), oxyfluorfen (720 g a.i ha-1) and the mixture fluazifop + fomesafen (200 + 250 g a.i ha-1), and an untreated control, respectively. The results obtained have allowed to affirm the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Post-emergence herbicides; Selectivity; Tissue thickness and proportion; Visual toxicity; Weed chemical management.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000300385

Efeito residual de inseticidas sintéticos sobre Trichogramma pretiosum Riley (Hym., Trichogrammatidae) em diferentes gerações - DOI: 10.4025/actasciagron.v30i2.1723
Provedor de dados: 1
Autores: Moscardini, Valéria Fonseca; UFLA; Moura, Alexandre Pinho de; UFRRJ; Carvalho, Geraldo Andrade; UFLA; Lasmar, Olinto; UFLA.
O presente trabalho teve por objetivo avaliar a ação residual dos produtos etofemprox, fenitrotiom, metidatiom e triclorfom sobre adultos de Trichogramma pretiosum, bem como sobre as gerações F1 e F2 desse parasitóide, em condições de laboratório. Ovos do hospedeiro alternativo Anagasta kuehniella (Zeller) (Lep., Pyralidae) foram aderidos em cartelas de cartolina azul, inviabilizados sob lâmpada germicida e tratados por imersão nas soluções inseticidas e em água destilada (testemunha) por cinco segundos. Os ovos foram expostos ao parasitismo uma, 24 e 48 horas após o tratamento, por um período de 24 horas, e posteriormente mantidos em câmara climatizada a 24&amp;plusmn;1ºC, UR de 70&amp;plusmn;10% e 12 horas de fotofase até a emergência dos parasitóides....
Palavras-chave: 5.01.02.00-1    Fitossanidade controle biológico; Inimigo natural; Parasitóide; Pesticidas; Seletividade 5.01.02.00-1    Fitossanidade biological control; Natural enemy; Parasitoid; Pesticides; Selectivity.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1723

Weed management strategies for castor bean crops
Provedor de dados: 1
Autores: Costa, Augusto Guerreiro Fontoura; Embrapa Algodão; Sofiatti, Valdinei; Embrapa Algodão; Maciel, Cleber Daniel de Góes; Universidade Estadual do Centro-Oeste; Poletine, Juliana Parisotto; Universidade Estadual de Maringá; Sousa, João Igor de; Universidade Estadual do Centro-Oeste,.
Castor bean crops are agriculturally relevant due to the quality and versatility of their oil, both for the chemical industry and for biodiesel production. Proper weed management is important for both the cultivation and the yield of castor bean crops; therefore, the intention of the present work is to review pertinent information regarding weed management, including the studies regarding weed interference periods, chemical controls for use in different crop production systems and herbicide selectivity, for castor bean crops. Weed science research for castor bean crops is scarce. One of the main weed management challenges for castor bean crops is the absence of herbicides registered with the Ministry of Agriculture, Livestock and Food Supply (MALFS)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Weed competition; Herbicides; Selectivity; Ricinus communis.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/17090

Evaluation of the selectivity of gillnets and handlines for the capture of the blue runner (Caranx crysos) in areas of marine influence of the Tayrona National Natural Par
Provedor de dados: 50
Autores: Altamar,Jairo; Wong-Lubo,Juan; de la Hoz-M.,Javier; Martinez-Dallos,Iván.
ABSTRACT A greater knowledge of the selectivity of fishing gear allows determining the capacity to select the sizes and shapes of the species caught, in addition to providing useful information for their conservation and use. This study determined the selectivity parameters of gillnets (7.0, 7.6 and 10.2 cm of mesh size) and J hooks (n.° 7, 9 and 10), used in the artisanal catches of the blue runner (Caranx crysos), in different fishing sites in the Santa Marta region. The SELECT method was used to determine the selectivity parameters, while the Kurskall-Wallis test was used to evaluate differences in the catch per unit of effort (CPUE) between the mesh sizes and the evaluated hook gauges. The results demonstrate that the log-normal model better describes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Selectivity; Gillnet; Handline; Caranx crysos; Caribbean Sea of Colombia.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612020000300209

Selection of an experimental fish ladder located at the dam of the Itaipu Binacional, Paraná River, Brazil
Provedor de dados: 52
Autores: Fernandez,Domingo Rodriguez; Agostinho,Angelo Antônio; Bini,Luis Mauricio.
The specific selection of a weir and orifice type experimental fish ladder in the dam of the Itaipu Reservoir (Paraná River) was evaluated by samplings in the river downstream and at two points along the ladder (at heights of 10 m and 27 m) during 28 months. Among the 65 species recorded in the river (immediate downstream of the dam), 27 were captured on the ladder. The species that showed highest density on the ladder, the majority migratory, were moderately, or only slightly, abundant downstream. Among the most abundant species downstream, only one, non-migratory, was recorded in the ladder. The structure presented a negative selection in relation to large migratory pimelodids that might be overcome by enlarging the scale of its design. The sampling...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish ladder; Fish migration; Selectivity; Fish transposition; Reservoir.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400012

Selective enumeration and viability of Bifidobacterium animalis subsp. lactis in a new fermented milk product
Provedor de dados: 58
Autores: Antunes,Adriane Elisabete Costa; Grael,Elza Terezinha; Moreno,Izildinha; Rodrigues,Luana Gajardoni; Dourado,Fernanda Martelo; Saccaro,Daniela Marques; Lerayer,Alda Luiza Santos.
One of the key focuses of today's dairy industry worldwide is the continued development of new products, especially probiotic-based products. Buttermilk is originally a by-product of butter making fermented by Mesophilic Aromatic Cultures (MAC). It can also be made by fermentation of pasteurized whole milk or skimmed milk. This product is not marketed in Brazil. The objectives of this work were: (1) to develop a selective medium for Bifidobacterium animalis subsp. lactis enumeration and (2) to determine the viability of this microorganism during the shelf life of the buttermilk. Skim milk added with 10% sucrose or 0.03% sucralose was pasteurized and inoculated with a composite starter culture consisting of 1% MAC (containing Lactococcus lactis subsp....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mesophilic cultures; Buttermilk; Selectivity; Viability.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000100035

Impact of insecticides used to control Spodoptera frugiperda (J.E. Smith) in corn on survival, sex ratio, and reproduction of Trichogramma pretiosum Riley offspring
Provedor de dados: 117
Autores: Souza,Jander R; Carvalho,Geraldo A; Moura,Alexandre P; Couto,Marcelo H.G; Maia,Jader B.
Corn (Zea mays L.) is cultivated in large areas and considered one of the world's major cereal crops. There are several arthropod pests that can reduce its production such as the fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lep.: Noctuidae), which is considered to be the main pest for corn. Fall armyworm is primarily controlled by insecticides. The use of biological control agents to manage this pest is growing with an emphasis on the egg parasitoid Trichogramma pretiosum Riley (Hym.: Trichogrammatidae). Thus, the aim of this research was to evaluate the impact of the following insecticides (g ai L-1) beta-cypermethrin (0.03), chlorfenapyr (0.60), chlorpyrifos (0.96), spinosad (0.16), etofenprox (0.10), triflumuron (0.08),...
Tipo: Journal article
Palavras-chave: Integrated pest management; Parasitoid; Selectivity; Triflumuron; Zea mays.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000200006

Side Effects of Fungicides Used in Cucurbitaceous Crop on Trichogrammaatopovirilia Oatman &amp;amp; Platner (Hymenoptera: Trichogramatidae)
Provedor de dados: 117
Autores: Pratissoli,Dirceu; Milanez,André M.; Barbosa,Wagner F.; Celestino,Flávio N.; Andrade,Gilberto S.; Polanczyk,Ricardo A.
Trichogramma spp. (Hymenoptera: Trichogrammatidae) can control Diaphania hyalinata Linnaeus (Lepidoptera: Pyralidae). On the other hand, pesticides may reduce the efficiency of natural enemies. The objective was to evaluate the side-effects of fungicides used in the production of cucurbitaceous crops on Trichogramma atopovirilia Oatman &amp;amp; Platner parasitizing D. hyalinata eggs. The fungicides used in bioassays were: azoxystrobin (0.08 g active ingredient [ai] L-1), chlorothalonil (2.00 g ai L-1), mancozeb (1.60 g ai L-1), tebuconazole (0.25 g ai L-1) and thiophanate-methyl (0.49 g ai L-1). Cardboards with 30 D. hyalinata eggs previously immersedin fungicide solutions and distilled water (control) were offered separately to 20 newly emerged T....
Tipo: Journal article
Palavras-chave: Cucurbit borer; Pesticides; Egg parasitoid; Selectivity.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000200016

Toxicity of organic supplies for the egg parasitoid Telenomus podisi
Provedor de dados: 65
Autores: Silva,Débora Mello da; Bueno,Adeney de Freitas.
Toxicity (dosage per hectare) of: 1) Baculovirus anticarsia 140x109 cpi; 2) Bacillus thuringiensis 16.8g; 3) Azadirachtin-A, azadirachtin-B, nimbina and salamina 9.6 ppm; 4) Rotenoids 4 liters; 5) Nitrogen 1.3%, phosphorus 3.0% and total organic carbon 8.0% 3 liters; 6) Sodium silicate 2% 4 liters; 7) Copper 7% + calcium 3.3% 1.8 liters; 8) Sulfur 20% + quicklime 10% 1.8 liters; 9) Chlorpyrifos 384g; 10) Distilled H2O (control) were evaluated for pupae and adults of Telenomus podisi. Treatments from 1 to 8 were in general harmless (class 1) to both pupae and adults of T. podisi. Among them, only treatment 5 and 7 presented slightly toxic to the parasitoid with a reduction in parasitism 5 days after F1 parasitoid emergence. Differently, the chlorpyrifos was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: IOBC; Biological control; Organic soybean; Selectivity.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000100003

Effects of pesticides used in soybean crops to the egg parasitoid Trichogramma pretiosum
Provedor de dados: 65
Autores: Bueno,Adeney de Freitas; Bueno,Regiane Cristina Oliveira de Freitas; Parra,José Roberto Postali; Vieira,Simone Silva.
This research aimed to study the effects of different insecticides, herbicides and fungicides on eggs, larvae and pupae of Trichogramma pretiosum. The results showed that studied pesticides had different impact on T. pretiosum. Esfenvalerate 7.5 and spinosad 24.0 grams ha-1 were classified as harmfull (class 4) while clorfluazuron 10.0, methoxyfenozide 19.2, lactofen 165.0, fomesafen 250.0, fluazifop 125.0, glyphosate 960.0 (Gliz® and Roundup Transorb®), azoxistrobin + ciproconazol 60.0 + 24.0, azoxistrobin 50.0 and myclobutanil 125.0 grams ha-1 were chemicals classified as harmless to all imature T. pretiosum stages. All the other chemicals evaluated had different impact on T. pretiosum being classified from harmless (class 1) to harmful (class 4) varying...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Selectivity; Biological control; Chemical control; Integrated pest management.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000600001

Residual action of insecticides to larvae of Chrysoperla externa (Hagen, 1861) (Neuroptera: Chrysopidae) under greenhouse conditions
Provedor de dados: 64
Autores: Costa,Denilson Bezerra; Souza,Brígida; Carvalho,Geraldo Andrade; Carvalho,César Freire.
ABSTRACT - This work was designed to evaluate the residual action of the insecticides trichlorfon, triflumuron, endosulfan, fenpropathrin, chlorpirifos, tebufenozide and esfenvalerate, sprayed on cotton plants, to second-instar larvae of Chrysoperla externa (Hagen, 1861), under greenhouse conditions. The experimental design was completely randomized with ten replicates. Three larvae were released on each plant, in the 1st, 12th and 23rd day after pesticides spray. Tebufenozide and esfenvalerate were little persistent (class one), while trichlorfon, triflumuron and endosulfan were slightly persistent, decreasing the survival of C. externa larvae over 30%, up to 14 days after spray. Fenpropathrin and chlorpirifos caused mortality over 30%, up to 25 days...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Selectivity; Predator; Pesticides; Cotton.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542003000400014

Tolerance of dry bean cultivars to saflufenacil
Provedor de dados: 64
Autores: Diesel,Francielli; Trezzi,Michelangelo Muzell; Oliveira,Paulo Henrique; Xavier,Elouize; Pazuch,Daiana; Pagnoncelli Junior,Fortunato.
The herbicide saflufenacil is a Protox inhibitor, with differential translocation mode in comparison to other herbicides with the same mechanism of action. Selectivity, efficacy and safety to the environment are important characteristics for practical application of a herbicide in agriculture. The aim of this study was to determine the tolerance of ten dry bean cultivars to saflufenacil, applied on preemergence. The experiment was conducted in split plot randomized blocks design with ten dry bean cultivars (IAPAR 81; IPR Tiziu, IPR Corujinha; BRS Estilo; BRS Talismã; BRS Esplendor; BRS Campeiro; BRS Radiante, BRS Vereda and Jalo Precoce) allocated in plots and saflufenacil concentrations (0, 14.7 and 29.4 g ha- 1) in subplots. Evaluations were performed at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Selectivity; Protox inhibitor; Phaseolus vulgaris.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000400005