Stink bugs are one of the most relevant pest affecting soybean yields beyond the physiological and sanitary quality of the soybean seeds. The aim of the present study was to evaluate the effect of spray nozzles and droplet size on spray deposits into soybean canopy and the biological efficacy of insecticide used to control stink bugs. Field experiments were conducted at the São Paulo State University, Brazil, comparing the effects of spray nozzles: hollow cone TXA 8002 VK (very fine droplet), extended range flat fan XR 8003 (fine/medium droplet), twin flat fan TTJ 6011002 (medium droplet), air induction flat fan AIXR 110025 (very/extremely coarse droplet) and drift guard twin flat fan DGTJ 11002 (fine droplet) using for all treatments an application rate of 218 L ha −1 . Spray deposits on soybean leaves taken from the bottom, middle and top canopy tiers were quantified with insecticide associated with Brilliant Blue dye. In general, the amount of spray deposits on soybean canopy had little difference regardless the spray nozzle type. The mortality of stink bugs shows no significant difference regardless the spray nozzle type on the treatments applied insecticide. The stink bugs provide reduction on soybean yield on the treatment only without insecticide application.

中文翻译：

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巴西圣保罗州西部地区喷雾喷嘴和液滴尺寸对大豆冠层沉积物和臭虫控制的影响

臭虫是影响大豆产量的最相关害虫之一，超出了大豆种子的生理和卫生质量。本研究的目的是评估喷嘴和液滴大小对大豆冠层喷雾沉积的影响以及用于控制臭虫的杀虫剂的生物功效。现场实验在巴西圣保罗州立大学进行，比较了喷雾喷嘴的效果：空心锥形 TXA 8002 VK（极细液滴）、大范围扁平风扇 XR 8003（细/中液滴）、双扁平风扇 TTJ 6011002（中等液滴）、空气感应扁平风扇 AIXR 110025（非常/极粗的液滴）和漂移防护双扁平风扇 DGTJ 11002（细液滴）用于所有处理，施用率为 218 L ha -1 。在从底部取出的大豆叶子上喷洒沉积物，使用与亮蓝染料相关的杀虫剂对冠层中层和顶层进行量化。一般来说，无论喷嘴类型如何，大豆冠层上的喷雾沉积物量几乎没有差异。无论喷洒喷嘴类型如何，在施用杀虫剂的处理中，臭虫的死亡率均无显着差异。仅在不使用杀虫剂的情况下，臭虫会降低大豆产量。