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本文研究了常用农用化学品对褐飞虱及其捕食性天敌的影响。结果表明，在常规浓度处理下，扫氟特对褐飞虱、尖钩宽邑蝽、黑肩绿盲蝽成虫的杀伤作用大，丁草胺对褐飞虱和草间小黑蛛成虫杀伤小，但对尖钩宽邑蝽、黑肩绿官蝽成虫杀伤大；乙草胺仅对黑肩绿盲蝽成虫有较大的杀伤作用。快杀稗、苄磺隆、金秋、稻福星、杜邦农得时对上述害虫和天敌无明显致死作用。异稻瘟净对褐飞虱２、３龄若虫、尖钩宽邑蝽、黑肩绿盲蝽成虫的杀伤作用显著，但百菌清、叶枯灵、多菌灵、井岗霉素、三环唑、叶青双的杀伤不明显。尿素的杀虫作用也不明显。同时，还测定了扫氟特、丁草胺、乙草胺、异稻瘟净对褐飞虱及其上述天敌的毒性，并计算出毒力回归方程和ＬＣ５０值。
In this paper, the effects of common agrochemicals on BPH and their predatory natural enemies were studied. The results showed that, under the conventional treatment, the insecticidal effect of Swept on adults of N. lugens, G. occidentalis and Apodemus agrarius was greater than that of butachlor, Acrocephalus larvae, black shoulders Green Bugs adults kill large; acetochlor only Larva of green-shouldered Larva adults have a greater killing effect. Fast barnyard grass, metsulfuron-methyl, golden autumn, rice Fuxing, DuPont farmer on the pests and natural enemies no significant lethal effect. The effects of isolates of rice blast on the 2nd instar nymphs of N. lugens, N. cuspidatus and L. giganticola adults were significant, but the killing effects of chlorothalonil, levofloxacin, carbendazim, , Ye Qing double killing is not obvious. Insecticidal effect of urea is not obvious. At the same time, the toxicities of clobetasine, butachlor, acetochlor and isogenic rice blast to BPH and their natural enemies were also determined, and the virulence regression equations and LC50 values were calculated.