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采用浸叶法,测定了昆明地区十字花科蔬菜3种蚜虫田间种群对8种杀虫剂的敏感性.结果表明,这3种蚜虫种群对苦参碱、除虫菊素、印楝素、啶虫脒、吡虫啉、氯氰菊酯、敌敌畏、乙酰甲胺磷的敏感性差异明显.其中,这3种蚜虫对乙酰甲胺磷高度不敏感,其对甘蓝蚜、萝卜蚜和桃蚜的LC50值分别为4868.68,2440.53和6379.34 mg/L;这3种蚜虫对敌敌畏也不敏感,其对甘蓝蚜、萝卜蚜和桃蚜的LC50值分别为259.76,95.24和567.59 mg/L;3种蚜虫对其它6种药剂的敏感性也存在差异,但相对较为敏感.
By using the leaf dipping method, the sensitivity of three kinds of aphids in cruciferous vegetables to the eight insecticides in Kunming was determined. The results showed that the three kinds of aphids were sensitive to matrine, pyrethrin, azadirachtin, The sensitivity of amifosine, imidacloprid, cypermethrin, dichlorvos and acephate was significantly different, among them, the three kinds of aphids were highly insensitive to acephate, and the LC50 values of the three aphids to cabbage aphid, radish aphid and green peach aphid were 4868.68, 2440.53 and 6379.34 mg / L, respectively. The three aphids were also insensitive to dichlorvos with LC50 values of 259.76, 95.24 and 567.59 mg / L for cabbage aphid, radish aphid and Myzus persicae, respectively. There are also differences in sensitivity, but relatively sensitive.