Susceptibility of Spodoptera exigua to UVA Insecticides Using Agricultural Multi-copter on Cabbage Field
2019
Park, B.Y., National Institute of Agricultural Sciences, Wanju, Republic of Korea | Lee, S.K., National Institute of Agricultural Sciences, Wanju, Republic of Korea | Jeong, I.H., National Institute of Agricultural Sciences, Wanju, Republic of Korea | Park, S.K., National Institute of Agricultural Sciences, Wanju, Republic of Korea | Lee, S. B., National Institute of Agricultural Sciences, Wanju, Republic of Korea | Kim, G.H., Chungbuk National University, Cheongju, Republic of Korea
We investigated the control efficacy and phytotoxicity of unmanned aerial vehicle-applied pesticides against the insect Spodoptera exigua, a major emerging pest in Chinese cabbage. Phytotoxicity was investigated in cabbage and 7 crops cultivated in the perconducted on 8 surrounding crops including Chinese cabbage at 1 to 2 times the recommended pesticide dosage. We treated cabbage fields with spinetoram suspension concentrate (16×), methoxyfenozide, sulfoxaflor suspension concentrate (16×). Then, we used water-sensitive paper to measure the distribution pattern of falling pesticide particles and the degree of coverage. Two of the pesticides showed 97% control efficacy, however, control efficacy might differ in resistant populations. Phytotoxicity was not observed in Chinese cabbage and the 7 surrounding crops treated with 1 to 2 times the recommended pesticide dosage. Analysis of the distribution pattern of falling pesticide particles revealed that breeze caused particle diffusion. Thus, wind is an important factor affecting the uniform treatment and diffusion of multicopter-applied pesticides. It follows that setting optimal conditions is necessary for effective control and treatment.
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