Effects of Crop Protection Unmanned Aerial System Flight Speed, Height on Effective Spraying Width, Droplet Deposition and Penetration Rate, and Control Effect Analysis on Wheat Aphids, Powdery Mildew, and Head Blight

As a new type of crop protection machinery, the Crop Protection Unmanned Aerial System (CPUAS) has developed rapidly and been widely used in China; currently, how to use CPUAS scientifically become top priority. However, relationships between operating parameters effective spraying width (ESW), droplet distribution characteristics, control effects insect pests diseases are not clear yet. Therefore, three levels flight speed (FS) as 3, 4, 5 m/s, height (FH) 1.5, 2.0, 2.5 m, volume 2.0 L/min experiments were carried out investigate FS FH on ESW, deposition uniformity (DDU), penetration rate (DPR) by using an electric single-rotor CE20. Based obtained results, combined with occurrence agronomic laws, optimal operation selected wheat aphids, powdery mildew, head blight. The results showed that ESW CE20 was consistent, maximum value 5.78 minimum one 2.51 m. had highly significant impact (p = 0.0033 < 0.01), while interaction no ESW. coefficients variation (CV) 23.3% 34.4%, which meant good uniformity. 0.0019) 0.02) impacts DDU. aphids 78.71% (1 day), 84.88% (3 days), 90.42% (7 mildew 77.17% days) 82.83% (14 effect blight 88.32% (20 days). This study proved optimization combination agronomy, for could be achieved CPUAS. research would provide some technical supports application.