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本文对新研制合成的吡啶类杀虫剂蚜虱净（Ｉｍｉｄａｃｌｏｐｒｉｄ）进行室内和田间防治棉蚜药效试验和毒力测定，结果表明，２５％蚜虱净可湿性粉剂对棉蚜有优异的防治效果。室内盆栽药效试验用０．６３ｐｐｍ药液防治棉蚜，治后５天防效可达９５％以上。江苏和山西两省的田间药效试验，每公顷用蚜虱净原药３７．５ｇ防治棉蚜，治后５天防效均达９５％以上，７～１０天可维持９０％以上效果。室内对棉蚜触杀毒力测定结果亦表明，蚜虱净对棉蚜具有较高的杀虫活性。处理后２４小时时棉蚜的触杀毒力ＬＣ５０为０．３８ｐｐｍ，比氧化乐果的ＬＣ５０１１０．０４ｐｐｍ高出２８９．６倍；处理后４８小时的触杀毒力ＬＣ５０为０．１９ｐｐｍ，比氧化乐果的ＬＣ５０６３．６ｐｐｍ高出３３４．７倍。
In this paper, the imidacloprid and imidacloprid insecticide imidacloprid (Imidacloprid), a newly developed pyridine pesticide, were tested both in indoor and field. The results showed that 25% of imidacloprid effect. Indoor potted efficacy test with 0.63ppm liquid aphid control, five days after the control effect of up to 95%. Jiangsu and Shanxi provinces field efficacy test, with hectares of aphid louse net original drug 37.5g control cotton aphid, five days after the control effect of more than 95%, 7 to 10 days to maintain the effect of more than 90%. Indoor toxicity test on cotton aphids also showed that the imidacloprid had a higher insecticidal activity. Toxoplasmosis LC50 of cotton aphid at 24 hours after treatment was 0.38ppm, 289.6 times higher than that of LC50110.04ppm of omethoate; The LC50 of contact toxicity 48 hours after treatment was 0.19ppm, The LC5063.6ppm is 334.7 times higher.