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室内生测结果表明:氟硅菊酯对褐飞虱3龄若虫的LC50值为9.98mg/L,与吡蚜酮相比,氟硅菊酯对褐飞虱3龄若虫的LC50值是吡蚜酮的14.14倍;田间试验结果表明:氟硅菊酯具较好的速效性、持效性,药后3d,5%氟硅菊酯EC(制剂用量)1500～4500mL/hm2对褐飞虱的防治效果为76.39%～94.00%,药后21d,5%氟硅菊酯EC(制剂用量)3000～4500mL/hm2对褐飞虱的控制效果仍有73.88%～89.22%,因此从防效和经济的角度考虑,5%氟硅菊酯EC控制褐飞虱最佳制剂用量为3000～4500mL/hm2,防治适期宜在褐飞虱低龄若虫高峰期。
The indoor bioassay results showed that the LC50 value of silafluoside on the 3rd instar nymphs of BPH was 9.98mg / L, compared with pymetrozine, the LC50 value of silatrid for BPH instar nymphs was 14.14 times that of pymetrozine The results of field trials showed that Flos Grussene has good fast-acting and persistence efficiency. The control efficacy of 5% Flos Fragrant Ester 1500 ~ 4500mL / hm2 on BPH was 3d% 94.00% and 21 d after treatment, the control effects of 5% silafluofen EC (dosage) 3000 ~ 4500mL / hm2 on BPH were still 73.88% ~ 89.22%. Therefore, from the aspects of control effect and economy, The optimum dosage of inulin EC for controlling BPH was 3000-4,500mL / hm2, and the optimum stage for controlling BPH was at the peak of nymphs of N. lugens.