Optimization of spray operation parameters of unmanned aerial vehicle confers adequate levels of control of fall armyworm (Spodoptera frugiperda)

文献类型： 外文期刊

第一作者： Liu, Ying

作者： Liu, Ying;Liang, Xiao;Wu, Chunling;An, Xingkui;Wu, Mufeng;Chen, Qing;Liu, Ying;Liang, Xiao;Wu, Chunling;An, Xingkui;Wu, Mufeng;Chen, Qing;Liu, Ying;Liang, Xiao;Wu, Chunling;An, Xingkui;Wu, Mufeng;Chen, Qing;Liu, Ying;Liang, Xiao;Wu, Chunling;An, Xingkui;Wu, Mufeng;Chen, Qing;Zhao, Zihua;Li, Zhihong

作者机构：

关键词： unmanned aerial vehicle; fall armyworm; spray operation parameter; droplet deposition; control effect

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：4.8； 五年影响因子：5.7 ）

ISSN： 1664-462X

年卷期： 2025 年 16 卷

页码：

收录情况： SCI

摘要： Introduction The fall armyworm (FAW), Spodoptera frugiperda, is a serious threat to maize production. Unmanned aerial vehicles (UAVs) represent a promising method for controlling FAW outbreaks. Given that FAW larvae primarily feed inside the maize whorl, we hypothesized that the efficacy of insecticide application depends on droplet density and coverage rate on the upper maize canopy.Methods This study evaluated the effects of spray operation parameters-including three flight heights (2.0, 2.5, and 3.0 m), three spray volumes (30.0, 37.5, and 45.0 L ha-1), and two nozzle types (XR11001VS and XR110015VS)-on droplet deposition distribution in maize canopies. Additionally, the control efficacy of 35% chlorantraniliprole water dispersible granules (WDG) against FAW was assessed over three consecutive years (2019-2021) to determine its correlation with droplet deposition.Results Results indicated that flight height, spray volume, and nozzle type significantly influenced droplet deposition distribution. Two treatments-XR110015VS nozzle with 37.5 L ha-1 spray volume at 2.5 m flight height and XR110015VS nozzle with 45.0 L ha-1 spray volume at 2.5 m flight height-achieved the highest droplet density, optimal coverage rate on the upper maize canopy, and the lowest damage index, confirming our hypothesis. These treatments also demonstrated comparable FAW control efficacy to traditional electric air-pressure knapsack sprayers.Discussion The findings provide practical insights for optimizing UAV-based insecticide applications to improve FAW management in maize production systems.

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