草坪害虫淡剑袭夜蛾生物学及防治技术的研究

淡剑袭夜蛾（Sidemia depravata Butler)在山东草坪草上1年发生4－5代，危害盛期在7－8月。田间发生量以冷季型草托亚黑麦草上最多，猎狗高羊茅和午夜早熟禾次之，暖季型草牙根上最少。4种草坪草品种对其幼虫发育历期、雌雄蛹重、单雌产卵量和存活率均有影响,但对蛹期影响不大。管理措施对幼虫的发生量有显影响，以长势好、田间湿度大、刈草不及时的地块发生重。拟除虫菊酯类的夜蛾必杀和高效氯氰菊酯。有机磷类的敌百虫、辛硫磷和奎硫磷对该虫都很敏感，在常用浓度下防效均达95％以上。Bt乳剂和灭幼脲3号对低龄期幼虫防治效果高，但速效性差。

Study on biology and control techniques of lawn pest Sidemia depravata Butler

Sidemia depravata occured 4~5 generations one year in Shandong Province and the harmful peak period was about in July and August. Its population was the largest in the perenial ryegrass fields, followed in tall fescue and kentucky bluegress fields, and the smallest in Bermudagrass fields.The different grass varieties had evident effects on larval development duration, pupal weight of male and female, fecundity and survival rate, but only had little effect on pupal period. The management techniques had evident effect on the pest population, and the pest developed relatively larger population in the fields with grass growing well, higher humidity and not timely clipping. The pest was susceptible to synergistic alphacypermethrin, alphacypermethrin, trichlorphon, phoxim and quinalphos, with their control effect higher than 95%. Bt EO and mieyouniao had rather effective to the yang larvae, but their fast effect is not good.