烟草粉斑螟幼虫在烟垛上分布的调查

Investigation on Larvae Distribution of Ephestia elutella Hubner on Stacks of Stored Tobacco Leaves in Warehouse

在郑州卷烟厂仓库调查了烟草粉斑螟幼虫在烟垛上的分布情况。结果表明，同一烟库、不同货位、不同层次的虫量没有明显差异；同一货位，越冬幼虫在烟包表面的数量比内部多；不同烟库、不同货位、同一层次同种烟叶上的幼虫数量没有显著差异；同一货位、不同龄期的烟草粉斑螟幼虫在烟包不同部位分布数量有明显差异，低龄幼虫与老熟越冬幼虫多分布在烟包表面与包内表层，而中、高龄幼虫多分布在烟包内部。

An investigation was carried out to study the larvae distribution of Ephestia elutella Hubner on stacks of stored tobacco leaves in Zhengzhou Cigarette Factory warehouse.The results showed that there were no significant differences in larvae number at different layers on different stacks in the same warehouse.The larvae were significantly more abundant on the surface than in the inner of tobacco sacks at the same stack.No significant difference was found in larvae number at the same layer of different stacks in different warehouses.At the same stack,significant difference was found in the larvae distribution at different positions,most of the young and aged larvae distributed on the surface layer of the sacks,while the middleaged larvae were mostly in the inner of the sacks.