Welcome to Journal of Tea Science,Today is

Journal of Tea Science ›› 2021, Vol. 41 ›› Issue (2): 203-212.doi: 10.13305/j.cnki.jts.20210315.001

• Research Paper • Previous Articles     Next Articles

Feasibility Evaluation of the Appilcation of Unmanned Aerial Vehicle for Tea Plant Protection

CHU Bo1, LUO Fengjian1, LUO Zongxiu1, LIU Yan1, LOU Zhengyun1, CHEN Huacai2, CAI Xiaoming1,*   

  1. 1. Tea Research Institute of Chinese Academy of Agricultural Sciences, Hangzhou 310008, China;
    2. China Jiliang University, Hangzhou 310018, China
  • Received:2020-05-18 Revised:2020-06-24 Online:2021-04-15 Published:2021-04-13

Abstract: In order to evaluate the feasibility of unmanned aerial vehicle (UAV) for tea plant protection, the droplet deposition distribution, control effect on small green leafhoppers (Empoasca onukii), and pesticide residues between UAV and knapsack electric sprayer (KES) were tested and compared. The results show that nozzles and adjuvants of UAV had little effect on droplet deposition distribution. The droplet size, droplet density and droplet deposition of UAV were better than those of KES, but the uniformity of droplet deposition was worse. The coefficient of variation of droplet deposition by UAV was 2.44 times higher than that by KES with common spraying-water volumes. With the same amount of chlorfenapyr and common spraying-water volumes, the control efficacy to tea leafhopper by UAV was similar with that by KES. However, when the dosage of chlorfenapyr was reduced by 25%, the control efficacy by UAV was significantly declined. Under the same dosage and regular water consumption, the pesticide residues of 6 pesticides, including chlorfenapyr, deltamethrin, indoxacarb sprayed by UAV were 1.20-2.44 times higher than those by KES. Since significantly increasing the pesticide residues in tea, the application of UAV for tea plant protection should be treated with caution.

Key words: unmanned aerial vehicle, tea garden, droplet deposition distribution, control efficacy, pesticide residue

CLC Number: