白跗平腹小蜂对松毛虫卵的寄生率及控制作用

Parasitic Rate and Control Effeet of Anastatus albitarsis on Dendrolimus punctatus

白跗平腹小蜂(Anastatus albiparsis Ashmead)在浙江省为松毛虫、柳杉毛虫、水青蛾等主要森林害虫的卵期寄生蜂。为了更好地发挥该蜂对害虫的抑制作用,有必要搞清其在林间的活动情况。1987～1989年,分别在浙江丽水(半山区)和金华(丘陵区)两地同时进行该峰林间种群动态的研究,所得结果一致。现以丽水点的试验情况,报道如下。

Anastatus albitarsis Ashmead is an important egg parasite for Dendrolimus punctatus Walker and is distributed in various types of pine forests in Zhejiang Province. There are two peaks of adult emergence in a year. May-June and September^October, which synchronize with the oviposition period of D.punctatus in Zhejiang province.Its parasitic rate is 22.9%.The body of the wasp is relatively big with a longer life-span and a powerful searching ability. Besides, it can be bred easily in large numbers with tussah eggs and is a useful parasite for control.