Evaluation on the Efficacy of Spraying Insecticide by UAV on the Larva of Dasychira axutha

In 2021, a trial area was established in the Pinus massoniana forest in Sha County, Fujian Province, 6 kinds of biological pesticides were applied by artificial spraying and UAV spraying, and the control effect, work efficiency and cost were compared.The results showed that the control effect of spraying by UAV was significantly better than that by manual spraying.The work efficiency of spraying by UAV was 1.33 hm²·h^-1, which was 8.87 times higher than that by manual spraying 0.15 hm²·h^-1, the labor cost of manual spraying operation is 5 times of that of UAV spraying operation.UAV spray application shows strong technical advantages, with high efficiency, low cost, easy to operate and other significant advantages, for a time-saving, labor-saving, cost-reduction method of application.