柿长绵粉蚧的生物学特性及药剂防效
周 琳1*；马俊青2；王俊超3
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作者单位：1河南农业大学植物保护学院 郑州 450002；2 河南省林业科学研究院 郑州450008；3 河南省兰考县农业局 兰考 475300
中文关键词：柿长绵粉蚧， 生活史， 生活习性， 田间防效
英文关键词：Phenacoccus pergandei, life cycle, living habit, controlling efficacy
中文摘要：柿长绵粉蚧Phenacoccus pergandei Cockrell是近年来严重危害柿树的重要害虫。该虫在河南省郑州地区1 年发生1 代，以3 龄若虫在枝条上和树皮缝中越冬。每年3 月上旬越冬若虫开始为害，4月中旬雌成虫继续为害。4 月下旬开始产卵，卵期约20 d。5 月上旬卵开始孵化，5 月中旬为卵孵化盛期。幼虫有3 个龄期，以3 龄若虫于10 月下旬开始越冬。7种药剂对柿长绵粉蚧的田间药效试验结果表明，40％杀扑磷乳油1 000倍液、3%高渗苯氧威乳油1 000倍液、25%噻嗪酮可湿性粉剂2 000倍液对柿长绵粉蚧具有良好的防效，药后7 d和药后15 d的防效均达90%以上。
英文摘要：Phenacoccus pergandei Cockrell, a pest of persimmon trees occurred seriously lately. It has one generation per year in Zhengzhou, Henan Province, overwintered as 3rd instar nymphs in branches and crevices in the raw bark. The overwintered nymphs begin to damage the trees in early March. The adults occur in midApril. The female adults start to lay eggs in late April and the oviposition lasts for about 20 days. Eggs begin to hatch in early May with peak in mid-May. The nymphs have 3 instars. The 3rd instar overwinters in late October. The experimental results with 7 pesticides against P. pergandei showed that 40% methidathion EC (1 000-fold dilution), 3% high rmeation fenoxycarb EC (1 000-fold dilution), 25% buprofezin WP (2 000-fold dilution) has excellent result with over 90% effectiveness within 7 d and 15 d after the treatment.