桑粉虱天敌—长跗浆角蚜小蜂的调查初报

Research and Preliminary Report on New Natural Enemy ( Eretmocerus longipe ) of Mulberry White Fly

通过多年的田间调查和研究 ,发现一种新的桑粉虱天敌———长跗浆蚜小蜂。该虫体细小 ,主要寄生桑枝第 3～ 7叶位上的桑粉虱幼虫 ,7月底至 9月中下旬田间寄生率达 2 5 5 %～ 81 4 % 。

Eretmocerus longipe ,a sort of new natural enemy of mulberry white fly ( Bemisia myricae ), has been discovered by field investigation and study in 1996 and 1997. It is thin in size, mainly parasitizes the mulberry white fly worm living on 3th～7th foliage of mulberry. The parasitizing percentage in the field from late July to middle and late September was 25.5%～81.4%. It can prevent mulberry white fly from breaking out effectively.