Spray nozzles, working pressures and use of adjuvant in reduction of 2,4-D herbicide spray drift

Abstract Background: The study of the interactions between equipment, application methods, and spray mixtures is fundamental to optimize the application of pesticides. The determination of the best combination of these factors can reduce the drift during the application of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D). Objective: The objective this paper is to study the influence of nozzle models, working pressures, and surfactant adjuvant in reducing the drift of 2,4-D. Methods: The spectrum of nozzle drops was determined for a conventional flat jet; flat jet with air induction; double plane jet with air induction; deflector flat jet with air induction; and an empty cone with air induction at pressures of 200, 300, 400, and 500 kPa. This was quantified in a wind tunnel with four drifts: water; water + surfactant adjuvant; water + 2,4-D; and water + 2,4-D + surfactant adjuvant, applied by the five nozzle models at four working pressures. The data was evaluated by analysis of variance and, when significant, by the Tukey test and regression at 5% significance level. Results: The interactions between the nozzle models, working pressure, and spray mixture directly influenced the 2,4-D drift. Conclusions: The use of surfactant adjuvant must be carried out carefully, according to the nozzle model, working pressure, and spray mixture. The conventional single fan jet nozzle is more sensitive to increased working pressure and has a high potential to cause drift compared with the models with air induction.

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Main Authors: Godinho Jr.,João D., C. Vieira,Lucas, A.A. Ruas,Renato, Carvalho Filho,Alberto, R. Faria,Vinícius, I.V.G. God,Pedro
Format: Digital revista
Language:English
Published: Sociedade Brasileira da Ciência das Plantas Daninhas 2020
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100320
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spelling oai:scielo:S0100-835820200001003202020-10-13Spray nozzles, working pressures and use of adjuvant in reduction of 2,4-D herbicide spray driftGodinho Jr.,João D.C. Vieira,LucasA.A. Ruas,RenatoCarvalho Filho,AlbertoR. Faria,ViníciusI.V.G. God,Pedro agricultural mechanization application technology quality control air induction droplet size wind tunnel Abstract Background: The study of the interactions between equipment, application methods, and spray mixtures is fundamental to optimize the application of pesticides. The determination of the best combination of these factors can reduce the drift during the application of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D). Objective: The objective this paper is to study the influence of nozzle models, working pressures, and surfactant adjuvant in reducing the drift of 2,4-D. Methods: The spectrum of nozzle drops was determined for a conventional flat jet; flat jet with air induction; double plane jet with air induction; deflector flat jet with air induction; and an empty cone with air induction at pressures of 200, 300, 400, and 500 kPa. This was quantified in a wind tunnel with four drifts: water; water + surfactant adjuvant; water + 2,4-D; and water + 2,4-D + surfactant adjuvant, applied by the five nozzle models at four working pressures. The data was evaluated by analysis of variance and, when significant, by the Tukey test and regression at 5% significance level. Results: The interactions between the nozzle models, working pressure, and spray mixture directly influenced the 2,4-D drift. Conclusions: The use of surfactant adjuvant must be carried out carefully, according to the nozzle model, working pressure, and spray mixture. The conventional single fan jet nozzle is more sensitive to increased working pressure and has a high potential to cause drift compared with the models with air induction.info:eu-repo/semantics/openAccessSociedade Brasileira da Ciência das Plantas Daninhas Planta Daninha v.38 20202020-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100320en10.1590/s0100-83582020380100070
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countrycode BR
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libraryname SciELO
language English
format Digital
author Godinho Jr.,João D.
C. Vieira,Lucas
A.A. Ruas,Renato
Carvalho Filho,Alberto
R. Faria,Vinícius
I.V.G. God,Pedro
spellingShingle Godinho Jr.,João D.
C. Vieira,Lucas
A.A. Ruas,Renato
Carvalho Filho,Alberto
R. Faria,Vinícius
I.V.G. God,Pedro
Spray nozzles, working pressures and use of adjuvant in reduction of 2,4-D herbicide spray drift
author_facet Godinho Jr.,João D.
C. Vieira,Lucas
A.A. Ruas,Renato
Carvalho Filho,Alberto
R. Faria,Vinícius
I.V.G. God,Pedro
author_sort Godinho Jr.,João D.
title Spray nozzles, working pressures and use of adjuvant in reduction of 2,4-D herbicide spray drift
title_short Spray nozzles, working pressures and use of adjuvant in reduction of 2,4-D herbicide spray drift
title_full Spray nozzles, working pressures and use of adjuvant in reduction of 2,4-D herbicide spray drift
title_fullStr Spray nozzles, working pressures and use of adjuvant in reduction of 2,4-D herbicide spray drift
title_full_unstemmed Spray nozzles, working pressures and use of adjuvant in reduction of 2,4-D herbicide spray drift
title_sort spray nozzles, working pressures and use of adjuvant in reduction of 2,4-d herbicide spray drift
description Abstract Background: The study of the interactions between equipment, application methods, and spray mixtures is fundamental to optimize the application of pesticides. The determination of the best combination of these factors can reduce the drift during the application of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D). Objective: The objective this paper is to study the influence of nozzle models, working pressures, and surfactant adjuvant in reducing the drift of 2,4-D. Methods: The spectrum of nozzle drops was determined for a conventional flat jet; flat jet with air induction; double plane jet with air induction; deflector flat jet with air induction; and an empty cone with air induction at pressures of 200, 300, 400, and 500 kPa. This was quantified in a wind tunnel with four drifts: water; water + surfactant adjuvant; water + 2,4-D; and water + 2,4-D + surfactant adjuvant, applied by the five nozzle models at four working pressures. The data was evaluated by analysis of variance and, when significant, by the Tukey test and regression at 5% significance level. Results: The interactions between the nozzle models, working pressure, and spray mixture directly influenced the 2,4-D drift. Conclusions: The use of surfactant adjuvant must be carried out carefully, according to the nozzle model, working pressure, and spray mixture. The conventional single fan jet nozzle is more sensitive to increased working pressure and has a high potential to cause drift compared with the models with air induction.
publisher Sociedade Brasileira da Ciência das Plantas Daninhas
publishDate 2020
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100320
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