SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Sell, Randall S.; Bangsund, Dean A.; Leistritz, F. Larry; Nudell, Daniel J..

A survey of 459 ranchers, 56 local decision makers, and 50 public land managers (565 total) was conducted to evaluate managerial, institutional, and social factors that may affect the rate and extent of implementation of various leafy spurge (Euphorbia esula L.) controls. The study focused on a five-county region in Montana, North Dakota, South Dakota, and Wyoming. The questionnaire focused on weed management in general and specifically on the perceptions and attitudes of ranchers, land managers, and local decision makers who have been directly and indirectly affected by leafy spurge.

PERCEPTIONS OF LEAFY SPURGE AND EVALUATION OF THE TEAM LEAFY SPURGE PROJECT BY PUBLIC LAND MANAGERS, LOCAL DECISION MAKERS, AND RANCH OPERATORS--SUMMARY

Palavras-chave: Leafy spurge; Weed management; Rancher opinion; Public land manager opinions.; Farm Management; Resource /Energy Economics and Policy.

Ano: 1998

URL: http://purl.umn.edu/23236

Leistritz, F. Larry; Hodur, Nancy M.; Bangsund, Dean A..

Leafy spurge is an exotic, noxious, perennial weed which is widely established in the north central United States and is an especially serious problem in the northern Great Plains (Bangsund et al. 1999). In 1997, the Agriculture Research Service and Animal Plant Health Inspection Service, U.S. Department of Agriculture, initiated a major Integrated Pest Management (IPM) research and demonstration project to develop and demonstrate ecologically based IPM strategies that can produce effective, affordable leafy spurge control. In 1998 and 1999, a survey of ranchers and public land managers was conducted to evaluate managerial, institutional, and social factors that might affect the rate and extent of implementation of various control strategies. In...

ASSESSMENT OF THE EXTENT AND SUCCESS OF LEAFY SPURGE BIOLOGICAL CONTROL AGENTS

Palavras-chave: Leafy spurge; Noxious weeds; Weed management; Rancher opinion; Land Economics/Use.

Ano: 2002

URL: http://purl.umn.edu/23544

Hodur, Nancy M.; Leistritz, F. Larry; Bangsund, Dean A..

Leafy spurge is an exotic, noxious, perennial weed which is widely established in the north central United States and is an especially serious problem in the northern Great Plains. In 1997, the Agricultural Research Service and the Animal and Plant Health Inspection Service of the U.S. Department of Agriculture (USDA), initiated a major Integrated Pest Management (IPM) research and demonstration project, TEAM Leafy Spurge (TLS), to develop and demonstrate ecologically based IPM strategies that can produce effective, affordable leafy spurge control. A key component of the project was to expand the use of biological control (biocontrol) agents, specifically flea beetles. To assess the level of insect establishment and the level of current and perceived...

Controlling Phalaris Minor in the Indian Rice-Wheat Belt

Palavras-chave: Leafy spurge; Biological control; Apthona lacertosa/czwalinae; Flea beetle; Noxious weeds; Weed management; Resource /Energy Economics and Policy.

Ano: 2004

URL: http://purl.umn.edu/23643

Vincent, David P.; Quirke, Derek.

The ACIAR-managed project CS1/1996/013, Herbicide-resistant weeds of wheat in India and Australia: integrated management, was designed to find a long-term method of control of Phalaris minor, a problem weed of the rice–wheat cropping system of north-western India. By 1993, the weed had developed resistance to isoproturon, a herbicide which had delivered effective weed control for 15 years. The short-term solution, implemented before the ACIAR project commenced, involved identification and registration of a new set of herbicides. But these new herbicides were expensive. To ensure high adoption they needed to be combined with changes in wheat-growing techniques that would provide cost savings to help farmers pay for them. And to avoid the re-emergence of...

Tipo: Book

Palavras-chave: Herbicide-resistant weeds; Wheat; Weed; India; Australia; Integrated management; Phalaris minor; Rice-wheat cropping systems; Chemical resistance; Weed management; Zero tillage; Cost saving; Net present economy; High benefits; Profitable technology; Agribusiness; Crop Production/Industries; Farm Management; Food Consumption/Nutrition/Food Safety; International Development; Production Economics.

Ano: 2002

URL: http://purl.umn.edu/47696

PERCEPTIONS OF LEAFY SPURGE BY PUBLIC LAND MANAGERS, LOCAL DECISION MAKERS, AND RANCH OPERATORS

Sell, Randall S.; Bangsund, Dean A.; Leistritz, F. Larry; Nudell, Daniel J..

Factors influencing adoption of conservation tillage in Australian cropping regions

Palavras-chave: Leafy spurge; Weed management; Rancher opinion; Public land manager opinions.; Farm Management; Resource /Energy Economics and Policy.

Ano: 1998

URL: http://purl.umn.edu/23399

D'Emden, Francis H.; Llewellyn, Rick S.; Burton, Michael P..

The purpose of this research is to improve understanding of conservation tillage adoption decisions by identifying key biophysical and socio-economic factors influencing no-till adoption by grain growers across four Australian cropping regions. The study is based on interviews with 384 grain growers using a questionnaire aimed at eliciting perceptions relating to a range of possible long- and short-term agronomic interactions associated with the relative economic advantage of shifting to a no-tillage cropping system. Together with other farm and farmer-specific variables, a dichotomous logistic regression analysis was used to identify opportunities for research and extension to facilitate more rapid adoption decisions. The broader systems approach to...

Tipo: Article

Palavras-chave: Adoption; Conservation tillage; Herbicide resistance; No-till; Perceptions; Weed management; Farm Management.

Ano: 2008

URL: http://purl.umn.edu/118537

RANCH OPERATORS' PERCEPTIONS OF LEAFY SPURGE MANAGEMENT AND EVALUATION OF THE TEAM LEAFY SPURGE PROJECT

Hodur, Nancy M.; Leistritz, F. Larry; Bangsund, Dean A..

Leafy spurge is an exotic, noxious, perennial weed which is widely established in the north central United States and is an especially serious problem in the northern Great Plains (Bangsund et al. 1999). In 1997, the Agriculture Research Service and the Animal and Plant Health Inspection Service, U.S. Department of Agriculture, initiated a major Integrated Pest Management (IPM) research and demonstration project to develop and demonstrate ecologically based IPM strategies that can produce effective, affordable leafy spurge control. In 1998 and 1999, a survey of ranchers and public land managers was conducted to evaluate managerial, institutional, and social factors that might affect the rate and extent of implementation of various control strategies....

PERCEPTIONS OF LEAFY SPURGE BY RANCH OPERATORS AND LOCAL DECISION MAKERS: AN UPDATE

Palavras-chave: Leafy spurge; Noxious weeds; Weed management; Rancher opinion; Crop Production/Industries.

Ano: 2002

URL: http://purl.umn.edu/23522

Sell, Randall S.; Bangsund, Dean A.; Leistritz, F. Larry.

A survey of 476 ranchers and 45 local decision makers (LDM) (521 total) was conducted to evaluate managerial, institutional, and social factors that may affect the rate and extent of implementation of various leafy spurge (Euphorbia esula L.) controls. The respondents represented a four-county region in Montana and North Dakota and are compared and contrasted to a group of ranchers and LDM from surrounding counties surveyed in 1998. The questionnaire focused on weed management in general and specifically on the perceptions and attitudes of ranchers and LDM who have been directly and indirectly affected by leafy spurge. Overall, the updated survey results reveal that ranchers and LDM had fewer problems with all noxious weeds, including leafy spurge than...

Dynamic general equilibrium analysis of improved weed management in Australia's winter cropping systems

Palavras-chave: Leafy spurge; Weed management; Rancher opinion; Local decision maker opinion; North Dakota; Montana; Noxious weeds; Farm Management; Resource /Energy Economics and Policy.

Ano: 1999

URL: http://purl.umn.edu/23097

Wittwer, Glyn; Vere, David T.; Jones, Randall E.; Griffith, Garry R..

A recent analysis indicated that the direct financial cost of weeds to Australia’s winter grain sectorwas approximately $A1.2bn in 1998–1999. Costs of thismagnitude represent a large recurring productivity loss in an agricultural sector that is sufficient to impact significantly on regional economies.Using amulti-regional dynamic computable general equilibrium model, we simulate the general equilibrium effects of a hypothetical successful campaign to reduce the economic costs of weeds. We assume that an additional $50m of R&D spread over five years is targeted at reducing the additional costs and reduced yields arising from weeds in various broadacre crops. Following this R&D effort, one-tenth of the losses arising from weeds is temporarily...

Tipo: Article

Palavras-chave: CGE modelling; Dynamics; Weed management; Crop Production/Industries.

Ano: 2005

URL: http://purl.umn.edu/118584

PERCEPTIONS OF LEAFY SPURGE AND EVALUATION OF THE TEAM LEAFY SPURGE PROJECT, BY PUBLIC LAND MANAGERS, LOCAL DECISION MAKERS, AND RANCH OPERATORS

Hodur, Nancy M.; Leistritz, F. Larry; Bangsund, Dean A..

Ecological, phytosanitary, and agronomic aspects of target weeds for biological control studies in Antioquia, Colombia

Palavras-chave: Leafy spurge; Noxious weeds; Weed management; Rancher opinion; Land Economics/Use.

Ano: 2002

URL: http://purl.umn.edu/23539

Acta Agron. (Palmira)

Mira Taborda,Yerly Dayana; Castañeda Sánchez,Darío Antonio; Morales Osorio,Juan Gonzalo; Patiño Hoyos,Luis Fernando.

ABSTRACT Biological control as part of integrated weed management represents an emerging and promising method to minimize the use and impact of herbicides on the environment. The objective of this research was to determine the ecological, phytosanitary, and agronomic status of weeds associated with crops in Antioquia, Colombia, and their potential to be chosen as candidates for biological control studies using pathogenic fungi. The research was carried out through a sampling of weeds in 35 agricultural farms, distributed in 11 municipalities and 10 different crops, on which population ecological variables such as frequency and dominance were evaluated; phytosanitary variables such as incidence and severity of foliar fungal symptoms; as well as some...

URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122022000200195

Palavras-chave: Biocontrol; Phytosociology; Weed ecology; Weed biology; Weed management.

Ano: 2022

Influência da decomposição de diferentes resíduos vegetais submetidos a lâminas de irrigação no comportamento da vegetação espontânea - DOI: 10.4025/actasciagron.v32i2.3732

Agronomy

Souza, Adilson Pacheco de; UNESP - Faculdade de Ciências Agronômicas; Lima, Márcio Emanoel de; Programa de Pós-Graduação em Fitotecnia, UFRRJ, Seropédica; Carvalho, Daniel Fonseca de; UFRRJ, Seropédica; Guerra, José Guilherme Marinho; Embrapa Agrobiologia, Seropédica; Andrade, Irineu Pedro de Sousa; UFRRJ, Seropédica; Rocha, Hermes Soares da; UFRRJ, Seropédica.

Este trabalho objetivou avaliar o comportamento da vegetação espontânea com relação às taxas de decomposição de diferentes coberturas do solo submetidas à variação de lâminas de irrigação. Foram utilizados resíduos vegetais de Gliricídia (Gliricidia sepium), feijão-guandu (Cajanus cajan), capim Cameroon (Pennisetum purpureum) e Bambu (Bambusa vulgaris ‘vitata’). As lâminas irrigadas foram caracterizadas como T5, T4, T3, T2 e T1, correspondendo a aproximadamente 117, 100, 72, 59 e 38% da ETo. A decomposição dos resíduos vegetais foi analisada por meio de covered litter, em 2, 4, 7, 15, 30, 60, 90, 120 e 150 dias após instalação (DAI). Foram realizadas amostragens da vegetação espontânea aos 26, 64, 92, 124 e 152 DAI, em uma área de 0,0625 m²

Palavras-chave: 5.01.03.00-8 Palhada; Manejo da irrigação; Manejo de plantas daninhas Fitotecnia Straw; Irrigation management; Weed management.

Ano: 2010

URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3732

Hormesis with glyphosate depends on coffee growth stage

Anais da ABC (AABC)

CARVALHO,LEONARDO B. DE; ALVES,PEDRO L.C.A.; DUKE,STEPHEN O..

Weed management systems in almost all Brazilian coffee plantations allow herbicide spray to drift on crop plants. In order to evaluate if there is any effect of the most commonly used herbicide in coffee production, glyphosate, on coffee plants, a range of glyphosate doses were applied directly on coffee plants at two distinct plant growth stages. Although growth of both young and old plants was reduced at higher glyphosate doses, low doses caused no effects on growth characteristics of young plants and stimulated growth of older plants. Therefore, hormesis with glyphosate is dependent on coffee plant growth stage at the time of herbicide application.

Germination test as a fast method to detect glyphosate-resistant sourgrass

Palavras-chave: Coffea arabica L.; Weed management; Herbicide; Spray drift; Stimulatory effect.

Ano: 2013

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200813

Bragantia

Dias,Marcos Altomani Neves; Obara,Flavio Eduardo Botelhos; Arruda,Natalia; Cursi,Patricia Ribeiro; Gonçalves,Navara Roberto; Christoffoleti,Pedro Jacob.

The occurrence of weed species with different levels of resistance to glyphosate has increasingly spread in agricultural areas. In Brazil, sourgrass is among the main species presenting issues in this regard. Thus, fast and reliable methods to detect glyphosate resistance are of special interest for this specie, either for research or rational management purposes. This study was carried out to verify the feasibility of using the germination test to detect glyphosate resistance in sourgrass. The experiment was conducted with two sourgrass biotypes, with different levels of susceptibility to glyphosate. The seeds were previously imbibed in solutions composed of 0, 0.1875%, 0.25%, 0.75%, 1.5%, 3% and 6% of glyphosate during two periods, five and ten minutes,...

Residual herbicides in Roundup Ready soybean: A case study in multiple years and locations with Ipomoea triloba

Palavras-chave: Digitaria insularis (L.); Herbicide resistance; Weed management; Seed analysis.

Ano: 2015

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000300307

Ciência e Agrotecnologia

Ovejero,Ramiro Fernando Lopez; Picoli Junior,Gilmar José; Takano,Hudson Kagueyama; Palhano,Matheus; Westra,Philip.

ABSTRACT The evolution of glyphosate-resistant and -tolerant weeds has caused changes in weed management around the world. Residual herbicides are crucial tools for weed management, but the rate of adoption by soybean growers remains very low in Brazil. In this research, we used glyphosate tolerant Ipomoea triloba as a model weed species to evaluate the advantages of using residual herbicides on soybeans in multiple years and locations of transition and Cerrado regions of Brazil, rather than relying only on post-emergence control. Most residual herbicides provided enough residual activity to allow a longer application window in post-emergence. Treatments with residual herbicides increased overall weed control, preventing weed interference and increasing...

Water retention and s index of an oxisol subjected to weed control methods in a coffee crop

Palavras-chave: Pre-emergence; Weed management; Glyphosate resistance; Crop yield; Weed interference..

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100206

Ciência e Agrotecnologia

Siqueira,Raphael Henrique da Silva; Ferreira,Mozart Martins; Alcântara,Elifas Nunes de; Silva,Bruno Montoani; Silva,Raphael Comanducci.

Weed control in different crops affects the chemical, physical, and biological properties of the soil and consequently its structural quality. The objective of this study was to evaluate, using water retention characteristics and the S index, the physical quality of an Oxisol (Red-Yellow Latosol), subjected to weed control during the cultivation of coffee. The following weed control methods were evaluated: harrowing, brushcutting, residue crushing, manual weeding, post-emergence herbicide application, pre-emergence herbicide application, and maintenance of soil cover with peanut forage, Brachiaria grass, and spontaneous vegetation (no weed treatment). The following properties were determined for physical characterization of the soil: bulk density, total...