果实套袋是改善鸭梨外观品质的主要技术措施,但套袋后诱发了梨黄粉蚜大发生,给梨主产区造成了巨大的经济损失。据此我们于1996～1998年对套袋鸭梨黄粉蚜的发生规律进行了田间调查,提出了梨黄粉蚜的综合防治技术。1.梨黄粉蚜的发生规律梨黄粉蚜俗称黄粉虫,一年发生8～10代,以卵 Fruit bagging is the main technical measure to improve the appearance quality of Yali pear. However, after bagging, large occurrence of pear yellow aphid was induced, which caused huge economic losses to the main producing areas of pear. Based on this, we conducted a field survey of the occurrence of bagged pear yellow aphids from 1996 to 1998 and put forward the comprehensive prevention and control technology of pear yellow aphid. 1. The occurrence of pear yellow aphid pear fruit aphid commonly known as Tenebrio, occurring 8 to 10 generations a year, with eggs