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测定了沙蚕毒素类农药杀虫单、杀虫双、易卫杀、多噻烷、巴丹对美洲斑潜蝇各龄幼虫、雌成虫的毒力，进行了成虫取食忌避试验和田间小区试验结果表明：（１）美洲斑潜蝇１、２、３龄幼虫对杀虫单最敏感，其ＬＣ５０分别是０．１０６１、０．１２６４、０．１６００ｇ／Ｌ，其毒力回归曲线斜率分别是：７．９７８０、６．９５６１、５．１８６４美洲斑潜蝇幼虫对沙蚕毒素类农药以１龄最敏感，３龄幼虫对该类农药的ＬＣ５０是１龄的１．５～２倍田间用０．４５ｇ／Ｌ杀虫单喷雾第３和第６ｄ后，其校正虫口减退率分别为９２．０７％和９１．６６％，防治效果最显著；（２）沙蚕毒素类农药在施药前期３ｄ内对１龄幼虫有抑制作用，６ｄ后作用消失，说明其防效期不长，应与防效期较长的农药交替使用
The insecticidal single, insecticidal double, easy to kill, polythiazine, Badan were used to test the virulence of Nereidwort, The results showed that: (1) The first and second instar larvae of L. occidentalis were the most sensitive insecticides, with LC50 of 0.1061, 0.1264 and 0.1600 g / L, respectively. The slope of the virulence regression curve Respectively: 7.9780,6.9561,5.1864 A. americana leaf-larvae most sensitive to the first instar of nereistoxin pesticides, 3rd instar larvae of this pesticide LC50 is the first age of 1.5 to 2 Times field with 0.45g / L insecticide single spray on the 3rd and 6d, the corrected worm population reduction rates were 92.07% and 91.66%, the most significant control effect; (2) nereistoxin pesticides The first instar larvae were inhibited in the first three days of application and disappeared after 6 days, indicating that the control effect was not long and should be used interchangeably with pesticides with long-term control.