Influência de pontas de pulverização e adjuvantes no potencial de redução de deriva em túnel de vento

Chechetto, Rodolfo Glauber; Antuniassi, Ulisses Rocha; Mota, Alisson Augusto Barbieri; Carvalho, Fernando Kassis; Silva, Anne Caroline Arruda e; Vilela, Caroline Michels

doi:10.5433/1679-0359.2013v34n1p37

Cited by 18 publications

(13 citation statements)

References 3 publications

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“…For, the smaller tensions in the solutions with addition of the mineral oil promoted the greater spreading. Similar results were also found by Chechetto et al (2013) to study various adjuvants.…”

Section: Journal Of Agricultural Sciencesupporting

confidence: 87%

Organic Fungicides with Adjuvants in the Prevention of Diseases at Wheat

Ferreira¹,

Salvalaggio²,

Barbosa³

et al. 2017

JAS

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The efficiency of fungal solutions, without wheat in organic systems, can be improved with the use of adjuvants. The objective of this study was to evaluate the dispersion of fungal droplets of organic fungicides with adjuvants in wheat leaves and disease control efficiency. The experimental design used was the completely randomized design in factorial scheme 2 × 3, with 6 repetitions. The first factor corresponded to fungal solutions bordeaux syrup (200 g L ) and second factor to the adjuvants: mineral oil and vegetable oil (0.5% v v -1 ) and one Witness without application.. On the adaxial side, the use of the mineral oil provided scatter of drop 111.8 and 25.7% higher, to the grouts without adjuvants and vegetable oil, respectively. The greater spreading of the droplets on the two foliar faces and a lower incidence of the diseases with the product of the lime sulfur syrup + mineral oil. The use of the adjuvants in the syrups evaluated with positive results in the production components, standing out the mineral oil.

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Section: Journal Of Agricultural Sciencesupporting

confidence: 87%

Organic Fungicides with Adjuvants in the Prevention of Diseases at Wheat

Ferreira¹,

Salvalaggio²,

Barbosa³

et al. 2017

JAS

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“…Os resultados obtidos no presente trabalho corroboram com aqueles encontrados por Chechetto et al (2013) os quais concluíram, avaliando a deriva em túnel de vento, que a ponta com indução de ar proporcionou menores valores de porcentagem de deriva em comparação a outros modelos de pontas de pulverização.…”

Section: Resultsunclassified

“…Algumas pesquisas demonstram o potencial dos adjuvantes na diminuição do risco de deriva das pulverizações de produtos fitossanitários (Iost, 2008;Cunha et al, 2010;Chechetto et al, 2013).…”

Section: Introductionunclassified

Interação pontas-adjuvantes na estimativa do risco potencial de deriva de pulverizações

Madureira

Raetano

Cavalieri

2015

Rev. bras. eng. agríc. ambient.

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R E S U M OÉ crescente a preocupação com os riscos da deriva em pulverizações com produtos fitossanitários e seus efeitos sobre o ambiente, sendo cada vez mais importante a utilização de tecnologias que forneçam maior segurança. Objetivou-se avaliar pontas de pulverização de jato plano inclinado e jato plano com indução de ar empregadas na pulverização com diferentes adjuvantes de uso agrícola na estimativa do risco potencial de deriva por meio dos depósitos e espectro das gotas. Os tratamentos consistiram de quatro soluções combinadas a duas pontas de pulverização. Os depósitos foram medidos em diferentes distâncias e alturas, em túnel de vento. Os indicadores relativos ao espectro de gotas foram: porcentagem do volume de gotas com diâmetro menor ou igual a 100 μm, diâmetro da mediana volumétrica (DMV) e a amplitude relativa, determinados em um medidor de partículas a laser. A adição do adjuvante polímero vegetal à água propiciou diminuição dos depósitos, redução da porcentagem do volume de gotas com diâmetro menor ou igual a 100 μm e DMV maiores, indicando redução do risco potencial de deriva. Depósitos maiores foram obtidos com a ponta de jato plano inclinado sem adição de adjuvantes à calda, representando maior risco potencial de deriva em pulverização.Interaction spray nozzle-adjuvant to estimate potential risk of spray drift A B S T R A C TThere is increasing concern about the risk of pesticide spray drift and their effects on the environment, becoming increasingly important to use spray technologies that provide greater security. This study aimed to evaluate flat angled fan nozzle and the air induction flat fan nozzle combined to different spray adjuvant for agricultural use to estimate the potential risk of spray drift through deposits and spectrum of drops. The treatments were four spray solutions combined with two spray nozzles. Spray deposits were measured at different distances and heights into a wind tunnel. Indicators of droplet spectrum were: percentage of droplets volume smaller than or equal to 100 µm of diameter, volume median diameter (VMD), and relative span factor, obtained in a laser particle analyser. The addition of vegetal polymer adjuvant to water resulted in lower levels of spray deposits, reducing the percentage of droplets volume smaller than or equal to 100 µm of diameter and showed larger VMD, indicating low potential risk of spray drift. Higher deposit levels were obtained under angled flat fan nozzle without addition of adjuvant to the spray solution, which represents a greater potential risk of spray drift. Palavras

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“…Although real drift conditions might only be obtained in field experiments, the wind tunnel experiments have a great advantage over those, once wind tunnels determine the potential drift risk of different application systems. These experiments could not be repeated and compared under field conditions due to weather variations (NUYTTENS et al, 2009;CHECHETTO et al, 2013;GANDOLFO et al, 2013;FRITZ et al, 2014;GANDOLFO et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Spraying produces drops of different sizes and, therefore, it is required technical criteria to analyze and quantify comparing droplet sizes produced by other equipment. Thus, many researchers have used the laser diffraction method to study and analyze the droplet spectrum of different equipment (MOTA et al, 2010;CHECHETTO et al 2013;BUENO et al, 2013;OLIVEIRA et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Spray adjuvant characteristics affecting agricultural spraying drift

2015

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This study defined the main adjuvant characteristics that may influence or help to understand drift formation process in the agricultural spraying. It was evaluated 33 aqueous solutions from combinations of various adjuvants and concentrations. Then, drifting was quantified by means of wind tunnel; and variables such as percentage of droplets smaller than 50 μm (V50), 100 μm (V100), diameter of mean volume (DMV), droplet diameter composing 10% of the sprayed volume (DV 0.1 ), viscosity, density and surface tension. Assays were performed in triplicate, using Teejet XR8003 flat fan nozzles at 200 kPa (medium size droplets). Spray solutions were stained with Brilliant Blue Dye at 0.6% (m/ v). DMV, V100, viscosity cause most influence on drift hazardous. Adjuvant characteristics and respective methods of evaluation have applicability in drift risk by agricultural spray adjuvants.KEYWORDS: droplet size, wind tunnel, experimental methods, correlations, multivariate analysis. CARACTERÍSTICAS DOS ADJUVANTES QUE INFLUENCIAM NA DERIVA DE PULVERIZAÇÕES AGRÍCOLASRESUMO: Neste estudo, foram definidas as principais características dos adjuvantes que influenciam e que podem contribuir para compreender o processo de formação de deriva nas pulverizações agrícolas. O experimento avaliou a pulverização de 33 soluções aquosas obtidas das combinações de adjuvantes e concentrações, e quantificou dos mesmos a deriva em túnel de vento e as variáveis denominadas de percentual de gotas menores que 50 µm (V50), percentual de gotas menores que 100 µm (V100), diâmetro mediano volumétrico (DMV), diâmetro de gota tal que 10% do volume do líquido pulverizado é constituído de gotas de tamanho menor que esse valor (DV 0,1 ), viscosidade, densidade e tensão superficial. Os ensaios foram realizados em triplicatas, com pontas de pulverização Tejeet XR8003 VK, pressão de 200 kPa (gotas médias). As soluções pulverizadas foram marcadas com o corante Azul Brilhante a 0,6% (m v -1 ). O DMV, V100 e a viscosidade causam maior influência no potencial risco de deriva. As características avaliadas e suas respectivas metodologias de determinação apresentam aplicabilidade na avaliação de adjuvantes quanto ao potencial risco de deriva. PALAVRAS-CHAVE: tamanho de gotas, túnel de vento, métodos experimentais, correlações, análise multivariada.

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Influência de pontas de pulverização e adjuvantes no potencial de redução de deriva em túnel de vento

Cited by 18 publications

References 3 publications

Organic Fungicides with Adjuvants in the Prevention of Diseases at Wheat

Organic Fungicides with Adjuvants in the Prevention of Diseases at Wheat

Interação pontas-adjuvantes na estimativa do risco potencial de deriva de pulverizações

Spray adjuvant characteristics affecting agricultural spraying drift

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