为探析20%环丙氟虫胺悬浮剂飞防早稻二化螟的效果，笔者于2023年选用极飞P100PRO型植保无人机，设定了作业参数，开展了不同单位面积药液用量和商品制剂用量的试验。结果表明，在单位面积喷施额定商品制剂用量的前提下，对二化螟的防效并不随着药液用量的增加而提高，最佳药液用量为39.00 L/hm²；在单位面积喷施额定药液用量的前提下，对二化螟的防效随着单位面积商品制剂用量的增加而上升，其单位面积最优商品制剂用量为378.69 mL/hm²，施用1次后的持效期在15 d左右。

In order to explore the aerial control efficacy of 20% Cyproflanilide suspension concentrate against Chilo suppressalis in early rice, a field experiment was conducted using P100PRO plant protection unmanned aircraft as control tools, with different application rate per unit area and the commercial formulation dosage and set operating parameters in 2023. The results showed that, under the premise of applying the rated commercial formulation dosage per unit area, the control efficacy on Chilo suppressalis did not always increase with the increase of liquid dosage, and the optimal liquid dosage was about 39.00 L/hm². Under the premise of applying the rated liquid dosage per unit area, the control effect on Chilo suppressalis increased with the increase of the commercial formulation dosage per unit area, and the optimal commercial formulation dosage per unit area was about 378.69 mL/hm². The control efficacy after one application could last for about 15 days.