Asian rust is responsible for significant reductions in soybean yield. The application of fungicide is the main method of control of this disease, and to maintain the efficiency of phytosanitary treatment it is necessary to know several features of the application technology. Spray tips are fundamental for the quality of phytosanitary products application and exert a direct influence on spraying efficiency. The objective of this study was to evaluate the efficiency of different spray tips in spray deposition and leaf cover in the lower, middle and upper thirds of soybean plants in three distinct phenological stages. Another objective was to evaluate the efficiency of the commercial mixture trifloxystrobin + prothioconazole (FOX®), applied by different spray tips, in the control of Asian rust and soybean yield. The experiment was conducted for two agricultural years, and six spray tips were evaluated: TT 11001, TTJ60 11002, TXA 8003, 30HCX 12, GRD120 02 and GAT11002 in three fungicide applications with intervals of 15 days, in the phenological stages V6–V7, R1 and R4, using the working pressure of 5 bar and spray volume of 200 L ha⁻¹. The coverage and deposition of spray promoted by all spray tips, in the three phenological stages of soybeans, were sufficient to provide satisfactory control of rust, with means of disease severity ranging from 1.69 to 4.70%, compared to the control (mean severity of 54.34%), without significant loss of yield in the sprayed plots. All evaluated spray tips can be recommended for use in spraying FOX® fungicide (trifloxystrobin + prothioconazole) in soybean crop for Asian rust control, when the spray volume applied is 200 L ha⁻¹.

亚洲锈病是造成大豆产量显着下降的原因。杀菌剂的应用是防治该病害的主要方法，为了保持植物检疫处理的效率，有必要了解应用技术的几个特点。喷头是植物检疫产品应用质量的基础，直接影响喷洒效率。本研究的目的是评估不同喷头的效率三个不同物候阶段大豆植株下、中、上三分之一的喷雾沉积和叶盖。另一个目的是评估通过不同喷头施用的商业混合物嘧菌酯 + 丙硫菌唑 (FOX®) 在控制亚洲锈病和大豆产量方面的效率。该实验进行了两个农业年，评估了六个喷雾尖端：TT 11001、TTJ60 11002、TXA 8003、30HCX 12、GRD120 02 和 GAT11002，在三种杀菌剂应用中间隔 15 天，在物候阶段 V6-V7， R1 和 R4，使用 5 bar 的工作压力和 200 L ha ^-1的喷雾量. 在大豆的三个物候阶段，所有喷头促进的喷雾覆盖和沉积足以提供令人满意的锈病控制，与对照相比，病害严重程度范围为 1.69% 至 4.70%（平均严重程度为 54.34 %)，在喷洒的地块中没有明显的产量损失。^{当喷洒量为 200 L ha -1}时，所有评估过的喷头均可推荐用于在大豆作物中喷洒 FOX® 杀菌剂（杀虫酯 + 丙硫菌唑）以控制亚洲锈病。