Influence of working pressure and spray nozzle on the distribution of spray liquid in manual backpack sprayers

Arquivos do Instituto Biologico Pub Date : 2019-01-01 DOI:10.1590/1808-1657000442018

Alcides Marangoni Junior, Marcelo da Costa Ferreira

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Abstract

ABSTRACT Manual backpack sprayers are widely used in rural properties in Brazil. However, studies that assess their working characteristics, especially spray tip models and working pressure conditions, are scarce. Thus, the aim of this study was to assess how much the working pressure and spray tips influence the distribution quality of phytosanitary spray solutions in manual backpack sprayers. Four spray nozzles (standard flat-fan Magnojet TP11002, turbo flat-fan TeeJet TT11002, hollow-cone TeeJet TXA8002, and disc-core) were assessed in a patternator table at 1, 2, 3, and 4 bar. Analyses of spray distribution profile were performed by symmetry and the coefficient of variation (CV) analysed by the Tukey’s test (p < 0.05). Spray tip models and working pressure influenced in more than 100% the distribution uniformity values of spray solution and in about 50% the useful range of the phytosanitary treatment. Among the models assessed in this study, the turbo flat-fan spray nozzle presents the best set of characteristics to be indicated for manual backpack sprayers aiming at field phytosanitary treatments.

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工作压力和喷嘴对手动背负式喷雾器喷雾液分布的影响

手动背包喷雾器在巴西的农村物业中广泛使用。然而，评估其工作特性，特别是喷嘴模型和工作压力条件的研究很少。因此，本研究的目的是评估工作压力和喷雾头对手动背负式喷雾器中植物检疫喷雾溶液分布质量的影响程度。在1、2、3和4 bar的模式表中评估4种喷嘴(标准平面风扇型Magnojet TP11002、涡轮平面风扇型TeeJet TT11002、空心锥型TeeJet TXA8002和圆盘型)。喷雾分布曲线采用对称性分析，变异系数采用Tukey检验(p < 0.05)。喷头型号和工作压力对喷雾溶液分布均匀性值的影响超过100%，对植物检疫处理有效范围的影响约为50%。在本研究评估的模型中，涡轮平扇喷雾喷嘴具有最佳的一组特性，可用于针对野外植物检疫处理的手动背包喷雾器。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Arquivos do Instituto Biologico

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审稿时长

48 weeks