Comparison of field and model percentage drift using different types of hydraulic nozzles in pesticide applications

Yarpuz-Bozdogan, Nigar; Bozdoğan, Ali

doi:10.1007/bf03327621

Cited by 21 publications

(23 citation statements)

References 24 publications

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“…The treatments can be placed in this order: GMV>GMG>GMO>MKM>ULVA. Results of the present study are comparable to results reported by YarpuzBozdogan et al, 12) who found that the initial residues of dicofol on strawberries after treatment with different spraying techniques ranged from 0.005 to 0.14 mg/kg. Data in Table 3 show that there is a clear positive relation of bifenthrin deposits on leaves with the spray volume applied.…”

Section: Deposit Of Bifenthrin After Applicationsupporting

confidence: 91%

Effect of spray application techniques on spray deposits and residues of bifenthrin in peas under field conditions

Hanafi

Hindy

Ghani

2016

Journal of Pesticide Science

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Five spraying techniques were evaluated for the coverage of bifenthrin on peas under open field conditions. Ultra-low volume sprayer (ULVA) and Ground hydraulic motor with conventional spray gun (GMG) gave number mean diameters (NMDs) from 27 to 68 and from 33 to 73 N/cm 2 with volume mean diameter (VMD) from 50 to 120 and from 320 to 508, respectively. Homogeneity factor values were 2, 2, 2.5, 2.8, and 13.5 in ULVA, Domestic modification of the ground hydraulic motor sprayer with one nozzle (GMO), Ground hydraulic motor sprayer with vertical boom (GMV), Motorized knapsack mist blower sprayer (MKM) and GMG. The percentages of the lost spray in the ground were 23, 39, 21, 24, and 36% for ULVA, MKM, GMG, GMO and GMV, respectively. An analytical method was developed using QuEChERS and GC-ECD to determine the initial deposit of bifenthrin in pods and leaves. Initial deposits were from 0.006 to 0.05 mg/kg in pods and from 0.03 to 0.66 mg/kg in leaves. The most efficient technique was single nozzle Twinjet, followed by the motorized knapsack sprayer.

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Section: Deposit Of Bifenthrin After Applicationsupporting

confidence: 91%

Effect of spray application techniques on spray deposits and residues of bifenthrin in peas under field conditions

Hanafi

Hindy

Ghani

2016

Journal of Pesticide Science

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“…That result was expected because it is well known from the literature that drift can be reduced by increasing the droplet size (Cross et al 2001;Yarpuz-Bozdogan and Bozdogan 2009). The ground deposits inside the orchard (BR-between rows) during coarse spraying were higher for both sprayer types, travel speeds and tree training systems when compared to fine spraying (compare BR data from Tables 5, 6).…”

Section: Results Of Drift Assessment During Spring Applicationssupporting

confidence: 53%

Interactions between spray drift and sprayer travel speed in two different apple orchard training systems

Stajnko

Vajs

2014

Int. J. Environ. Sci. Technol.

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Trials were carried out in apple orchards of two different training systems to assess the relationship between spray drift and parameters of spraying with an emphasis on the sprayer's travel speed when applying different solutions, such as pesticides or fertilizers, onto the apple trees. The assessments were based on the following factors: per cent of spay drift, two sprayers (axial-and radial-fan sprayer), two training systems (super spindle and modified slender spindle), spray droplet size (fine or coarse droplets) and the sprayer's travel speed (5 vs. 10 km h -1 ). The studies were conducted in the spring and summer seasons under similar external weather conditions to test any seasonal effects that might occur. In this paper, all tested factors and interactions were found to have a significant effect on the spray drift during spray application. For instance, the increase in sprayer speed reduced the spray drift percentage. Other factors, such as sprayer type (axial fan and radial fan) and tree training system, had an impact on spray drift as well.

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“…This pattern was also observed by Yarpuz-Bozdogan & Bozdogan (2009), who obtained largest drift values at a distance of 1 m from the crop, using an application rate of 200 L ha -1 on grassland. Beyond 20 m, the drift percentage was less than 1%.…”

Section: Resultssupporting

confidence: 76%

Field data and prediction models of pesticide spray drift on coffee crop

Alves

Cunha

2014

Pesq. agropec. bras.

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-The objective of this work was to generate drift curves from pesticide applications on coffee plants and to compare them with two European drift-prediction models. The used methodology is based on the ISO 22866 standard. The experimental design was a randomized complete block with ten replicates in a 2x20 split-plot arrangement. The evaluated factors were: two types of nozzles (hollow cone with and without air induction) and 20 parallel distances to the crop line outside of the target area, spaced at 2.5 m. Blotting papers were used as a target and placed in each of the evaluated distances. The spray solution was composed of water+rhodamine B fluorescent tracer at a concentration of 100 mg L -1 , for detection by fluorimetry. A spray volume of 400 L ha -1 was applied using a hydropneumatic sprayer. The air-induction nozzle reduces the drift up to 20 m from the treated area. The application with the hollow cone nozzle results in 6.68% maximum drift in the nearest collector of the treated area. The German and Dutch models overestimate the drift at distances closest to the crop, although the Dutch model more closely approximates the drift curves generated by both spray nozzles.Index terms: Coffea arabica, drift curves, environmental contamination, hydropneumatic sprayer, nozzles. Dados de campo e modelos de estimação de deriva nas aplicações de agrotóxicos na cultura do caféResumo -O objetivo deste trabalho foi gerar curvas de deriva a partir de aplicações de agrotóxicos em cafeeiro e compará-las a dois modelos europeus de simulação de deriva. A metodologia utilizada baseia-se na norma ISO 22866. Utilizou-se o delineamento experimental de blocos ao acaso, com dez repetições, em arranjo fatorial 2x20 com parcelas subdivididas. Os fatores avaliados foram: dois tipos de pontas de pulverização (cone vazio com e sem indução de ar) e 20 distâncias paralelas à linha de cultivo fora da área-alvo, espaçadas em 2,5 m. Foram colocados papéis filtrantes como alvo, em cada uma das distância avaliadas. A calda foi composta por água+corante fluorescente rodamina B na concentração de 100 mg L -1 , para detecção por fluorimetria. Aplicou-se volume de calda de 400 L ha -1 , por pulverizador hidropneumático. A ponta com indução de ar reduz a deriva até 20 m de distância da área tratada. A aplicação com ponta de jato cônico resulta em deriva máxima de 6,68% no ponto de coleta mais próximo da área tratada. Os modelos Alemão e Holandês superestimam a deriva nas distâncias mais próximas à cultura, embora o modelo Holandês se aproxime mais das curvas de deriva geradas por ambas as pontas de pulverização.Termos para indexação: Coffea arabica, curvas de deriva, contaminação ambiental, pulverizador hidropneumático, pontas de pulverização.

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Comparison of field and model percentage drift using different types of hydraulic nozzles in pesticide applications

Cited by 21 publications

References 24 publications

Effect of spray application techniques on spray deposits and residues of bifenthrin in peas under field conditions

Effect of spray application techniques on spray deposits and residues of bifenthrin in peas under field conditions

Interactions between spray drift and sprayer travel speed in two different apple orchard training systems

Field data and prediction models of pesticide spray drift on coffee crop

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