果实套袋是改善鸭梨外观品质的主要技术措施,但套袋后梨黄粉虫为害严重,给果农造成巨大的经济损失。梨黄粉虫一年发生8—10代,以卵在果台残橛、树皮裂缝、剪锯口周围或枝干上的残附物内越冬。4月中旬羽化的成虫开始产卵,以后卵、虫均有,世代重叠。5月中下旬成虫陆续出蛰转枝危害,6月上旬以后陆续入袋危害梨果。由于梨果套袋后纸袋遮阴,诱发梨黄粉虫大发生,且整个梨生长季节均有梨黄粉虫入袋 Fruit bagging is the main technical measure to improve the appearance quality of Yali pear, however, the damage of pear mealworm after bagging is serious, causing huge economic losses to the growers. Pear Tenebrio occurs 8-10 generations a year, with eggs in the fruit residue, bark cracks, scissors around the mouth or branches of the debris in the winter. In mid April, the feathered adults begin to spawn. Afterwards, the eggs and insects are both stacked and overlapped. May late in succession out of insects stung Zhizu injury, after early in June into the bag one after another hazards pears. Pear fruit bagging after the shadow of paper bag, pear pear mealworm induced large occurrence, and throughout the pear growing season have pear into the bag