The LC_(50)(24h after spraying)of chemical, IBP, pretilachlor and butachlor on WBPH female adults were 643.55mg/L, 1906.00 mg/L and 12390.16 mg/L, respectively.

• 异稻瘟净、扫氟特和丁草胺对白背飞虱雌成虫 24h的LC(50)分别是643.；55 mg/L，1906