Air-assisted boom sprayer and spray deposition on bean plants

Bauer, Fernando César; Raetano, Carlos Gilberto

doi:10.1590/s0103-90162003000200002

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…It was observed that the XR nozzle at a spray volume of 200 L ha -1 promoted drifts of 28.2, 26.7 and 22.5% higher than the XR, TX and TJ60 nozzles, respectively, at a spray volume of 150 L ha -1 . According to Bauer and Raetano (2003) and Raetano and Bauer (2004), the use of fans to inject air in spray bar to 26 days after emergence (DAE) of bean plants can provide up to 60% loss of volume applied to plants.…”

Section: Resultsmentioning

confidence: 99%

Spray deposition on weeds of common bean crops

et al. 2011

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The results showed that the loss of the spray solution on the soil occurred mainly within the bean rows and with a high intensity when using a nozzle spraying 200 L ha -1 . At 30 days after sowing, the TX (150 L ha -1 ) nozzle was the only nozzle that promoted deposits of less than 210.0 µL g -1 of dry mass. The spray nozzles showed a good performance in the deposition of the spray solution on the weeds that occurred both within and between the rows. However, for both species there was great variation in individual deposits depending on their location in relationship to the plants.

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Section: Resultsmentioning

confidence: 99%

Spray deposition on weeds of common bean crops

et al. 2011

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“…De modo geral, os tratamentos com maiores volumes de aplicação obtiveram níveis significativamente maiores de depó-sitos, ao se comparar os obtidos com o menor volume aplicado na planta toda. Essa constatação também foi feita por BAUER e RAETANO (2003), aos 48 DAE de feijoeiro (cultivar Carioca), utilizando o mesmo equipamento pulverizador, com volumes de calda variando de 60 L a 210 L.ha -1 , porém na rotação máxima do ventilador.…”

Section: Resultsunclassified

Deposição e perdas da calda em feijoeiro em aplicação com assistência de ar na barra pulverizadora

Raetano

Bauer

2004

Bragantia

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RESUMOCom o objetivo de avaliar a influência da assistência de ar na deposição da calda de pulverização, em plantas de feijoeiro (Phaseolus vulgaris) aos 26 dias após a emergência (DAE), com pontas de pulverização de jato cônico vazio (JA-0,5 e JA-1) e jato plano (AXI-110015), e volumes de calda, foi realizado um experimento em delineamento inteiramente casualizado, utilizando como traçador o íon cobre. Alvos coletores (papel de filtro com 3 x 3 cm) foram afixados nas superfícies adaxial e abaxial de folíolos posicionados nas partes superior e inferior das plantas. Para aplicar a solução traçadora, utilizou-se pulverizador com barras de 14 metros, com e sem assistência de ar, volumes de 60 e 100 L.ha -1 , e velocidade do ar correspondente a 50% da rotação máxima do ventilador. Após a aplicação, os coletores foram lavados individualmente em solução extratora de ácido nítrico a 1,0 mol.L -1 , e a quantificação dos depó-sitos através de espectrofotometria. A assistência de ar não influenciou na deposição da calda tanto a 60 quanto a 100 L.ha -1 . O maior volume proporcionou maiores depósitos, sendo constatadas elevadas perdas para o solo (mais de 60%).Palavras-chave: tecnologia de aplicação, assistência de ar, pulverizador de barra, depósitos, Phaseolus vulgaris. ABSTRACT SPRAY DEPOSITION AND SPRAY LOSS USING AIR-ASSISTANCE BOOM ON BEAN PLANTSAiming to evaluate the effect of air-assistance in spray deposition on bean plants (Phaseolus vulgaris) with hollow nozzles (JA-0,5 and JA-1) and flat fan nozzle type (AXI-110015), and volume rates by airassisted and non-assisted sprayers, a completely randomized experiment was carried out using copper ion as a tracer to the evaluation of the deposits. At 26 days after emergence, artificial targets were positioned on the upper and under-side of the leaflets, on the top and bottom parts of the same plants under spray boom. For the application of tracer solution it was used a fourteen meter boom sprayer with and without air-assistance at 60 and 100 L.ha -1 of volume rates. The air flow was 50% of the maximum fan rotation. After application, targets were individually washed with an extracting solution of nitric acid (1.0 mol L -1 ), and the tracer deposition was quantified by spectrofotometry. The air-assistance did not influence spray deposition at rates of 60 as well as 100 L.ha -1 . The higher the volume was the higher the deposit levels as well as the spray losses to soil (above 60%).

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