模毒蛾的种群动态与生活史

Population Dynamics and Life History of Lymantria monacha

通过野外调查和室内饲养对模毒蛾的发生为害规律及生活史进行研究的结果表明:在阿尔山林区模毒蛾的寄主有兴安落叶松和樟子松。田间调查的结果表明:当地模毒蛾1年发生1代,其中以卵在枯枝落叶层下越冬为主,也有少量在树皮缝等处越冬;第2年5月下旬卵开始孵化为幼虫,幼虫期共5龄;老熟幼虫于7月初开始化蛹,7月9日为化蛹盛期;7月20日开始羽化为成虫,平均产卵量为110粒;雌雄蛾寿命分别为7天和5天。

The population dynsmics and life history of Lymantria monacha（ Linnaeus）（ Lepid opeara,Lymantridae）,a serious pest of Larix gmelinii（ Rupr.） in China were investigated at Aershan of the Great XinganMontain（ 47. 47° N,120. 24° E）,Inner Mongolia from 2011to 2013 to develop a sound forecast and management program. The results imdicated that Larix gmelinii and Pinus sylvestnis var.mongolica Litv,are host plants for L. monacha in this district. One generation occurred annually in the field of this district as investigated by filed surveys. The overwintering eggs usually under litter layer or in Bark seam. The eggs began to hatch into larvae in the second year in late may,larval stage are a total of five ages,and to establish various instars of table on L. monacha. Began to pupate matured larvae in early July,July 9 for pupation stage. Began on July 20,feather for adult,spawning an average of 110grains. Respectively longevity of male and female adults was 5days and 7days. Comprehensive observation,die moth was parasitic fly parasitic rate was 34% in pupal stage,larval stage in assassin bugs and natural enemies flies feeding rate was 5%.