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从美国引进的榆角尺蠖卵跳小蜂(Ooencyrtus ennomophagus Yoshimoto)在杭州一年发生7—8代,以老熟幼虫在寄主卵内越冬。能成功地寄生于马尾松毛虫(Dendrolimus punctatus Walker)和其它18种森林昆虫的卵。它的成虫发生期和马尾松毛虫各代卵发生期相配合。能顺利越冬和越夏。有许多中间转换寄主。在浙江定居和建立群落颇有希望,并可能成为马尾松毛虫的有效天敌。室内可利用茶黑毒蛾(Dasychira baibarana Matsumura)、松茸毒蛾[D. axutha (Collette)]和白点足毒蛾(Redoa cygnopsis Collenette)人工繁殖。
Ooencyrtus ennomophagus Yoshimoto, introduced from the United States, occurs in Hangzhou for 7-8 generations a year, with mature larvae overwintering in host eggs. Successfully parasitized eggs from Dendrolimus punctatus Walker and 18 other forest insects. The occurrence of its adult and Dendrolimus punctatus all generations of eggs coincide. Can successfully wintering and summer. There are many intermediate transformation hosts. It is promising in settling and establishing communities in Zhejiang and may become an effective predator of Dendrolimus punctatus. Indoors Dasychira baibarana Matsumura, D. axutha (Collette) and Redoa cygnopsis Collenette can be used for artificial breeding.