紫薇绒蚧的生物学特性与药剂防效
Biological characteristic and control efficacy of Eriococcus lagerstroemiae
贺冬英1**；程 建1；赵 胡2；陈水生3
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作者单位：1阜阳师范学院绿化科； 2阜阳师范学院生物系； 3阜阳师范学院化学系 安徽 阜阳 236041
中文关键词：紫薇绒蚧， 生物学特性， 致死中量， 毒力测定
英文关键词：Eriococcus lagerostroemiae, biological characteristic, median lethal concentration, toxicological test
中文摘要：紫薇绒蚧Eriococcus lagerostroemiae Kuwana是皖北地区严重危害紫薇(Lagerstroemia indice L.)的虫害之一。该虫年发生2代，以第2代2龄若虫和蛹在寄主枝条缝隙内越冬。翌年4月下旬，成虫出现、羽化、交配、产卵。周年虫口变动出现2个高峰(中/6～下/6和下/8～上/9)；相对其它参照药剂， 2.5%高效氯氰菊酯的毒力最佳、其防效与其它3种药剂防效差异显著，对紫薇绒蚧致死中量（LC50）为4.981 8 mg/L，有效成分为16.7 mg/L时的校正防效为94.52%。据此，在6月上旬和8月中旬若虫孵化盛期，施用有效成分为16.7 mg/L 的2.5%高效氯氰菊酯乳油能得到良好的防治效果。
英文摘要：Eriococcus lagerstroemiae Kuwana is one of the most important insect pest on Lagerstroemia indice L. in the northern Anhui Province. It has two generations per year and overwinters as second instar nymphs and pupa in the host twigs. The adults emerge, mate, and lay eggs from late April. There are two peaks of population fluctuation each year from the middle June to late June and late August to early September. Of the three pesticides, the Beta-cypermethrin 2.5% EC is the best against E. lagerstroemiae with its LC504.9818 mg/L and corrected mortality 94.52% at the concentration of 16.7 mg/L. The optimum result can be gotten if the Beta-cypermethrin 2.5% EC (16.7mg/L) is sprayed at the egg hatching peak (early June and mid August).