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烟草粉斑螟是烟叶及卷烟贮存期的重要害虫。本工作研究了烟草粉斑螟的生活史、习性及影响消长的主要因子。在湖北省该虫一年发生2～3代,在26～30℃,相对湿度70～90％对,卵历期5～7天,幼虫期29～50天,幼虫5～6龄,蛹期6～18天。幼虫蚕食烟叶成孔洞,老熟幼虫在烟叶表面或麻袋及仓库隐蔽处吐丝结茧化蛹。烟叶从收购入库至贮存各环节均可遭受为害,以卷烟厂贮存过程受害最甚。通常高、中档烟叶受害重于低挡烟叶,其烟草粉斑螟种群密度随着贮存期的延长呈线性增加。烟叶含水量达13％时,幼虫发育迅速,为害重;含水量低于10％时,幼虫发育受到明显影响。
Tobacco leaf blotch is an important pest of tobacco and cigarette storage. This work studied the life history and habits of the tobacco leaf blotch and the main factors that affect the growth and decline. In Hubei Province, the pests occur 2-3 generations per year in 26-30 ℃, relative humidity 70-90%, egg period 5-7 days, larval period 29-50 days, larva 5-6 and pupal stage 6 to 18 days. Larva nibbling tobacco into holes, mature larvae in the tobacco leaves or sacks and warehouse shelter spit silk cocoon pupation. Tobacco leaves from the acquisition and storage to all aspects of life can be harmed, the worst victims of cigarette factory storage process. Usually high and mid-range tobacco leaves suffer more damage than low-speed tobacco leaves, and the population density of the tobacco leaf blotch increases linearly with the prolongation of storage period. The tobacco larvae developed rapidly when the water content of tobacco reached 13%, and the damage was heavy; when the water content was less than 10%, the larvae development was significantly affected.