College of Information and Electrical Engineering, Shenyang Agricultural University, Shenyang, China.
Liaoning Engineering Research Center for Information Technology in Agriculture, Shenyang, China.
Pest Manag Sci. 2022 Aug;78(8):3564-3575. doi: 10.1002/ps.6999. Epub 2022 Jun 15.
Aerial spray is one of the most important applications of unmanned aerial vehicles (UAVs) in agriculture. This work aimed to promote the use of UAVs as an alternative to knapsack electric sprayers in pesticide application in Nanguo pear orchards planted in mountain terraced orchard scenarios. The spray deposition of four types of nozzles (SX110015, XR80015, IDK90015 and TR80015), two spray volume rates (45 and 90 L ha ) and with or without a commercial surfactant adjuvant were evaluated based on the spot spray mode.
The air- assisted IDK90015 nozzle showed significantly higher deposition and penetration, and its large droplet size also reduced the risk of drift. Increasing the spray volume rate can increase the amount of droplets deposition. The adjuvant showed excellent potential to improve spray technology in Nanguo pear trees, with a mean deposition of 0.175-0.574 μL cm and penetration of 3.09-66.73%. The droplet size also increased significantly, with volume median diameter (D ) of 469 μm.
The nozzle type, spray volume rate and adjuvant should be well considered when using the spot spray in orchard. Compared with increasing spray volume rate, the use of air-induction nozzles and surfactant-based adjuvants can improve the spray deposition better. © 2022 Society of Chemical Industry.
航空喷雾是无人机（UAV）在农业中最重要的应用之一。本工作旨在促进在山地梯田果园种植的南国梨树果园中，用无人机替代背负式电动喷雾器进行农药喷洒。本研究采用点喷模式，评估了四种喷嘴（SX110015、XR80015、IDK90015 和 TR80015）、两种喷雾体积率（45 和 90 L/ha）以及是否添加商品化表面活性剂助剂的喷雾沉积效果。
空气辅助式 IDK90015 喷嘴具有显著更高的沉积和穿透效果，且其较大的液滴尺寸还降低了飘移风险。增加喷雾体积率可以增加雾滴沉积量。助剂在南国梨树的喷雾技术中表现出极好的应用潜力，沉积均值为 0.175-0.574 μL/cm，穿透为 3.09-66.73%。雾滴尺寸也显著增大，体积中值直径（D ）为 469 μm。
在果园采用点喷时，应充分考虑喷嘴类型、喷雾体积率和助剂。与增加喷雾体积率相比，采用空气诱导喷嘴和基于表面活性剂的助剂可以更好地提高喷雾沉积效果。 © 2022 英国化学学会。
