通过对甘肃农业大学校园内合欢树羞木虱的调查，发现成虫、若虫均可刺吸为害，每片小叶平均虫口密度成虫1.5头，若虫4.8头，卵8.6粒。选用2%阿维菌素乳油、3%啶虫脒乳油、3%功夫乳油、25%氧乐氰乳油、50%抗蚜威可湿性粉剂、2.5%高渗高效氯氰菊酯乳油6种药剂，采用浸渍法和喷雾法对合欢羞木虱进行了室内毒力测定及防效试验。结果表明，2%阿维菌素乳油、25%氧乐氰乳油、2.5%高渗高效氯氰菊酯乳油3种药剂对合欢羞木虱的毒力较高，LC50值分别为55.3、13.3、41.8 μg/mL，3种药剂喷雾处理后3 d、7 d时，对合欢羞木虱的室内平均防治效果均高于59%。其中25%氧乐氰乳油防效最高，处理后3 d、7 d的防效分别为68.0%、81.4%；2%阿维菌素乳油防治效果次之，分别为60.7%、74.8%；2.5%高渗高效氯氰菊酯乳油防治效果最低分别为59.1%、72.7%，3种药剂的平均防效差异不显著。

Through the investigation of Acizzia jamatonica(Kuwayana) in gansu agricultural university campus， it was found that the tree of acacia could be damaged by the adults and nymphs sucking， and the average insect density of each leaflet was 1.5，4.8 nymphs and 8.6 eggs. Through the investigation on the campus of Gansu Agricultural University， the six kinds pesticides of 2% avermectin EC， 3% acetamiprid EC， 3% kungfu EC， 25% oxygen acylate EC， 50% anti-converse WP， 2.5% hypertonic beta-cypermethrin EC were used to test the toxicity and control of Acizzia jamatonica(Kuwayana) by dipping method and spray method. The indoor control test showed that the virulence of 2% avermectin EC， 25% oxygen acylate EC， 2.5% hypertonic beta-cypermethrin EC to Acizzia jamatonica(Kuwayana) were higher，the LC50 values were 55.3 μg/mL， 13.3 μg/mL， and 41.8 μg/mL，respectively. The average indoor control efficacy of the 3 insecticides was higher than that of 59% at 3 days and 7 days. Among them， control effect of 25% oxygen acylate EC was the highest， 68.0% and 81.4%， respectively， at 3 d and 7 d after spraying. Followed by 2% avermectin EC， were 60.7% and 74.8%， respectively， and 2.5% hypertonic beta-cypermethrin EC was the lowest， were 59.1% and 72.7% respectively. There was no significant difference in average control effect among the three agents.

S163.36