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紫茎泽兰提取物对米象、玉米象、绿豆象和蚕豆象等 4种储粮害虫成虫具有强烈的熏杀活性 ,用 4 4.4 4mg L的浓度熏蒸处理 4 8小时后 ,每种成虫死亡率均达到 1 0 0 .0 0 %。熏蒸毒力测定结果表明 ,紫茎泽兰提取物对上述 4种成虫 2 4小时的LC50 分别为 1 4 .65,1 2 .80 ,2 5.0 7和 1 2 .2 0mg L ,4 8小时的LC50 分别为 1 1 .79,9.67,1 3 .2 9和 9.76mg L。
Eupatorium adenophorum extract had a strong smoked activity against four kinds of stored grain insect pests, such as rice, corn, mung bean and broad bean, with the concentration of 4,4 4 mg L fumigated for 48 hours, each adult died The rates reached 100.0%. The results of fumigation virulence showed that the LC50 of Eupatorium adenophorum extract on the above 4 adult adults for 24 hours were 14.65,1.280, 25.07 and 22.0 mg L, 48 h LC50 were 11.79, 9.67, 13.29 and 9.76 mg L, respectively.