在吉林省通化市郊区,常怯寄蝇(Phryxe vulgaris)对菜粉蝶(Pieris rapae)蛹的寄生率平均为41.8％,有时高达60.7％,是开展生物防治有利用前途的天敌。现将该蝇的发生情况及人工饲养繁殖方法报道如下: 一、田间发生情况 经1980～1985年多年观察,最后一代常怯寄蝇产卵子越冬代老龄菜青虫体表,并很快钻入 In the suburbs of Tonghua City, Jilin Province, the parasitic rate of Phryxe vulgaris to Pieris rapae pupae was 41.8% on average, sometimes up to 60.7%. It is a natural enemy for the future development of biological control. Now the occurrence of the fly and artificial breeding methods are reported as follows: First, the occurrence of the field After many years of observation from 1980 to 1985, the last generation often flies the eggs of the flies overwintering on behalf of the old cabbage body surface and quickly drill into