Consulta: subjectFacets:"Surfactant"
Registros recuperados: 9
Data/hora: 10/06/2024 16:59:57

SPRAY RETENTION ON COFFEE LEAVES ASSOCIATED WITH TYPE AND CONCENTRATION OF ADJUVANTS
Provedor de dados: 70
Autores: Cação,José E. da C. R.; Moreira,Bruno R. de A.; Raetano,Carlos G.; Carvalho,Fernando K.; Prado,Evandro P.
ABSTRACT Agricultural spray adjuvants (ASA) are widely used in pesticide applications to enhance the performance of pesticides. The aim of this research was to investigate the effects of ASA on static surface tension (SST) and foliar spray retention on coffee leaves. The SST of ASA at different concentrations was determined by the drop weight method. Spray retention on adaxial and abaxial coffee leaf surfaces was performed using a micro-sprayer at solution concentrations of 0, 0.01, 0.1, 0.5, and 1.0% v v−1. The ASA assessed were: polyether-polymethylsiloxane-copolymer (PPC); Nonylphenol ethoxylate; nonyl polyethylene glycol ether; mineral oil; nonylphenoxy polyethoxy ethanol; carboxyl copolymer of styrene and butadiene; primary aliphatic oxyalkylated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Surfactant; Run-off; Spreading area; Pesticide application technology.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000500623

SPRAY DEPOSITION AT TWO GROWTH STAGES OF CATTAIL
Provedor de dados: 70
Autores: Silva,João R. V.; Silva Junior,Antonio C. da; Pereira,Maria R. R.; Martins,Dagoberto.
ABSTRACT Surfactant use in spray solutions has a major advantage of reducing droplet surface tension and increasing deposition. We aimed to evaluate droplet deposition on cattail plants (Typha subulata) using food coloring (Brilliant Blue - FD &amp; C-1) as marker added to spray solution at two different growth stages: vegetative (4 leaves) and flowering (5 leaves). The treatments were arranged in a completely randomized design with four replications and five plants per plot (16.2-L tanks). Treatments consisted of adding into spray solutions Brilliant Blue alone (control), Brilliant Blue + 0.5% v/v Aterbane and Brilliant Blue + 0.01% v/v Silwet. Spraying was performed by a pressurized CO2 sprayer at 220 kPa using two Teejet XR 8002 nozzles at a spray...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aterbane; Droplet; Silwet; Surfactant; Typha subulata.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000100194

Potential of adjuvants to reduce drift in agricultural spraying
Provedor de dados: 70
Autores: Oliveira,Rone B. de; Antuniassi,Ulisses R.; Mota,Alisson A. B.; Chechetto,Rodolfo G.
The reduction of pesticide spraying drift is still one of the major challenges in Brazilian agriculture. The aim of this study was to evaluate the potential of different adjuvant products, such as surfactants, drift retardants, mineral oil and vegetable oil for reducing drift in agricultural spraying. The experiment consisted of quantifying drift of sprayings of 18 adjuvants dissolved in water under controlled conditions in a wind tunnel. Tests were performed in triplicates with spraying nozzles type Teejet XR8003 VK, pressure of 200kPa and medium drops. Solutions sprayed were marked with Brilliant Blue dye at 0.6% (m v-1). The drift was collected using polyethylene strips transversally fixed along the tunnel at different distances from the nozzle and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wind tunnel; Drift retardant; Mineral oil; Vegetable oil; Surfactant.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000500010

Effets létaux et sublétaux à long terme d'un nonylphénol polyéthoxyle, le NP 5 sur la civelle
Provedor de dados: 5
Autores: Bocquene, Gilles; Miossec, Laurence.
Studying different concentrations, we have determined LT 50 of a non-ionic surfactant on elver eel: the polyoxyethylated nonylphenol NP 5. Then we studied sorne sublethal effects on fish behaviour and histological effects on gills, during 21 days. We demonstrated primary effects on gills structure and we believe in an impairing of the central nervous system.
Tipo: Text
Palavras-chave: Anguille; Tensio-actifs; Effets subletaux; Branchies; Eel; Surfactant; Sublethal effects; Behaviour; Gills.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00156/26705/24780.pdf

Adjuvants to Improve Phenmedipham + Desmedipham + Ethofumesate Efficacy Against Weeds in Sugar Beet (Beta vulgaris)
Provedor de dados: 87
Autores: IZADI-DARBANDI,E.; ALIVERDI,A.; ANABESTANI,M.; SHAMSABADI,A.
ABSTRACT: The efficacy of reduced (411.5 and 617.2 a.i. ha-1) and recommended (823.0 g a.i. ha-1) rates of phenmedipham + desmedipham + ethofumesate on the control of Amaranthus retroflexus, Amaranthus blitoides, Chenopodium album, and Tribulus terrestris in sugar beet field was investigated when they were tank-mixed with and without Adigor (0.5% v/v), Ammonium sulphate (2% v/v), Citogate (0.2% v/v), D-Octil (0.3% v/v), Hydro-Max (0.5% v/v), and Volck (0.5% v/v). When the herbicide was applied alone, there was no significant difference between the rates of 617.2 and 823.0 g a.i. ha-1 for reduction of total weed density and biomass. Significantly, the adjuvants decreased total weed density and biomass. However, there was no significant difference among the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Activator adjuvant; Herbicide mixture; Surfactant.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100221

Biosurfactant production by Phialemonium sp. using agroindustrial wastes: influence of culture conditions
Provedor de dados: 3
Autores: Camerini, Felipe Vieira; Chanin, Carlo do Amaral; Borba, Carina Molins; Costa, Jorge Alberto Vieira; Burkert, Carlos André Veiga; Burkert, Janaína Fernandes de Medeiros.
Biosurfactant are surface active compounds with emulsifying capacity and are produced by microorganisms, and they may be affected by factors related to microbial cultivation, such as pH, salinity, incubation time, carbon and nitrogen sources. The aim of this work was to study the influence of the culture conditions on the production of biosurfactants by Phialemonium sp using agroindustrial wastes. The processing parameters of temperature, humidity and pH produced the most significant effects on the production of biosurfactant and emulsifying activity. The maximum concentration of biosurfactant obtained in this study was equivalent to a surface tension reduction of 8.5 mg L-1 surfactin commercial solution using wheat bran, pH of 4.5, and 0.5% of soybean oil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.07.01.00-2 fermentation; Fungi; Surfactin; Rice; Wheat; Surfactant; Lipase. 2.12.02.02-8.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/43484

FACTORS INFLUENCING THE RESPONSES OF Tetranychus urticae Koch (ACARINA: TETRANYCHIDAE) TO THURINGIENSIN
Provedor de dados: 113
Autores: Vargas,Robinson; Chapman,Bruce; Penman,David R.
The effects of temperature, host plant, active ingredient mobility, surfactant, residue age and larval age on the response of Tetranychus urticae Koch to thuringiensin were evaluated in laboratory bioassays. T. urticae larvae were significantly more susceptible to thuringiensin at 13°C than at 28°C. A significantly different response of T. urticae larvae to thuringiensin residues was found on peach and apple leaves. Older T. urticae larvae were significantly more susceptible than younger larvae when exposed to thuringiensin residues. No systemic or translaminar effects of thuringiensin were detected; the leaf surface (upper or lower) and the addition of Silwet L-77 surfactant did not affect the efficacy of thuringiensin. The use of thuringiensin in spider...
Tipo: Journal article
Palavras-chave: Beta -exotoxin; Miticide; Bioassay; Pesticide; Residue age; Surfactant; Translocation.
Ano: 2002
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072002000100001

In vitro and in vivo evaluation of sodium dodecyl sulfate (SDS) as an inactivator of caprine lentivirus (CLV) in colostrum and milk
Provedor de dados: 45
Autores: Sousa,A.L.M.; Pinheiro,R.R.; Araújo,J.F.; Santos,V.W.S.; Azevedo,D.A.A.; Peixoto,R.M.; Souza,V.; Andrioli,A.; Damasceno,E.M.; Dantas,T.V.M.; Teixeira,M.F.S.
ABSTRACT The aim of this study was to evaluate in vitro and in vivo the effect of sodium dodecyl sulfate (SDS) on the caprine lentivirus (CLV) in colostrum and milk. This was performed to develop a practical and efficient method of blocking the lactogenic transmission of the virus. In the in vitro experiment, colostrum and milk were treated with 0.25%; 0.50% and 1% SDS. Then, somatic cells of colostrum and milk were submitted to co-culture with caprine synovial membrane cells (CSM). In the in vivo test, goats were fed with colostrum and milk provided from CLV-positive goats treated with SDS in the same concentrations used in the in vitro experiment. Animals were tested by nested polymerase chain reaction (nPCR) and Western blot (WB) assays. In the in vitro...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Monocyte-phagocytic system; Viral inactivation; Surfactant; Small ruminant lentiviruses.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000501459

Effect of surfactants and temperature on germination and vegetative growth of Beauveria bassiana
Provedor de dados: 58
Autores: Mwamburi,Lizzy A.; Laing,Mark D.; Miller,Ray M.
Three non-ionic surfactants: Tween20, Tween80 and Breakthru® were screened for their effects on spore germination and mycelial growth rates and for their influence on three isolates of Beauveria bassianaspore germination at various temperatures. Tween20 and Tween80 were compatible with all the B. bassiana isolates in the germination studies, but inhibited germination at higher surfactant concentrations, irrespective of the conidial concentrations. Breakthru® had an inhibitory effect on germination even at the lowest concentration of 0.1% on all the B. bassiana isolates. The effects of the surfactants on spore germination did not correspond with their effects on colony growth. Conidial viability within the same formulation declined significantly with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beauveria bassiana; Surfactant; Temperature; Conidia germination; Mycelial growth.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000100067