文献类型： 外文期刊

作者： Cui, Zongyin ¹ ; Cui, Li ² ; Yan, Xiaojing ² ; Han, Yifang ¹ ; Yang, Weiguang ¹ ; Zhan, Yilong ¹ ; Wu, Jiapei ¹ ; Qin, Yingdong ¹ ; Chen, Pengchao ¹ ; Lan, Yubin ¹ ;

作者机构： 1.South China Agr Univ, Natl Ctr Int Collaborat Res Precis Agr Aviat Pesti, Guangzhou 510642, Peoples R China

2.Chinese Acad Agr Sci CAAS, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China

3.South China Agr Univ, Coll Elect Engn, Coll Artificial Intelligence, Guangzhou 510642, Peoples R China

4.South China Agr Univ, Ctr Int Cooperat & Disciplinary Innovat Precis Agr, 111 Ctr, Guangzhou 510642, Peoples R China

5.Texas A&M Univ, Dept Biol & Agr Engn, College Stn, TX 77845 USA

关键词： Panonychus citri; unmanned aerial spraying system; spray performance; control effect

期刊名称：AGRICULTURE-BASEL （ 影响因子：3.6； 五年影响因子：3.8 ）

ISSN：

年卷期： 2025 年 15 卷 12 期

页码：

收录情况： SCI

摘要： In mountainous citrus orchards, the application of conventional ground sprayers for the control of citrus red mite (Panonychus citri) is often constrained by complex terrain and low operational efficiency. The Unmanned Aerial Spraying System (UASS), due to its low-altitude, low-volume, and high-maneuverability characteristics, has emerged as a promising alternative for pest management in such challenging environments. To evaluate the spray performance and field efficacy of different UASS types in controlling P. citri, five representative UASS models (JX25, DP, T1000, E-A2021, and T20), four mainstream pesticide formulations, and four novel tank-mix adjuvants were systematically assessed in a field experiment conducted in a typical hilly citrus orchard. The results showed that T20 delivered the best overall spray deposition, with upper canopy coverage reaching 10.63%, a deposition of 3.01 mu g/cm2, and the highest pesticide utilization (43.2%). E-A2021, equipped with a centrifugal nozzle, produced the finest droplets and highest droplet density (120.3-151.4 deposits/cm2), but its deposition and coverage were lowest due to drift. Nonetheless, it exhibited superior penetration (dIPR 72.3%, dDPR 73.5%), facilitating internal canopy coverage. T1000, operating at higher flight parameters, had the weakest deposition. Formulation type had a limited impact, with microemulsions (MEs) outperforming emulsifiable concentrates (ECs) and suspension concentrates (SCs). All adjuvants improved spray metrics, especially Yimanchu and Silwet, which enhanced pesticide utilization to 46.8% and 46.4% for E-A2021 and DP, respectively. Adjuvant use increased utilization by 4.6-11.9%, but also raised ground losses by 1.5-4.2%, except for Yimanchu, which reduced ground loss by 2.3%. In terms of control effect, the rapid efficacy (1-7 days after application, DAA) of UASS spraying was slightly lower than that of ground sprayers-electric spray gun (ESG), while its residual efficacy (14-25 DAA) was slightly higher. The addition of adjuvants improved both rapid and residual efficacy, making it comparable to or even better than ESG. E-A2021 with 5% abamectinetoxazole ME (5AE) and Yimanchu achieved 97.4% efficacy at 25 DAA. Among UASSs, T20 showed the rapid control, while E-A2021 outperformed JX25 and T1000 due to finer droplets effectively targeting P. citri. In residual control (14-25 DAA), JX25 with 45% bifenazateetoxazole SC (45BE) was most effective, followed by T20. 5AE and 45BE showed better residual efficacy than abamectin-based formulations, which declined more rapidly. Adjuvants significantly extended control duration, with Yimanchu performing best. This study demonstrates that with optimized spraying parameters, nozzle types, and adjuvants, UASSs can match or surpass ground spraying in P. citri control in hilly citrus orchards, providing valuable guidance for precision pesticide application in complex terrain.