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研究了稻田常用的７种除草剂和７种杀菌剂对白背飞虱成虫的直接杀伤作用和毒力大小。杀伤试验表明，扫氟特、丁草胺和异稻瘟净的常规推荐浓度对白背飞虱雌成虫的杀伤作用显著。三环唑、多菌灵、百菌清和叶青双在处理后第１，３ｄ对白背飞虱成虫有一定的杀伤力，但在第５，７ｄ无杀伤效果。乙草胺、苄磺隆、快杀稗、金秋、稻福星、井冈霉素和叶枯灵的杀伤作用不明显。毒力试验表明，白背飞虱雌成虫对异稻瘟净最敏感。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，１９０６．００ ｍｇ／Ｌ和 １２ ３９０．１６ｍｇ／Ｌ。
The direct killing effect and virulence of 7 herbicides and 7 fungicides on whitebacked planthopper adults were studied. Killing tests showed that the conventional recommended concentrations of clobetasine, butachlor and iso-rice blast inhibited the virulence of female whitebacked planthoppers. Tricyclazole, Carbendazim, Chlorothalonil and Yeqing Shuang had certain lethality to adult BPPH adults on the 1st and 3rd day after treatment, but had no lethal effect on the 5th and 7th day. The killing effects of acetochlor, metsulfuron, barnyardgrass, autumn, rice Fuxing, Jinggangmycin and Yeku Ling were not obvious. Virulence tests showed that female whitebacked planthoppers were the most sensitive to the different blast nets. The results showed that LC (50) of isolates of rice blast, clobetasine and butachlor to female white-backed planthoppers were 643.55 mg / L, 1906.00 mg / L and 12 390.16 mg / L, respectively.