筛豆龟蝽及其2种卵寄生蜂若干生物学特性的初步研究

A Preliminary study on some biological characters of globular stink bug, Megacopta cribraria and its two egg parasitoids

筛豆龟蝽(M egacopta cribraria)是福建福州菜用大豆的主要害虫,该虫1 a发生3代,以成虫越冬,3月中下旬越冬成虫出来活动.以成虫、若虫吸食为害菜用大豆茎秆、叶片和豆荚,为害高峰期分别是:5-6月份为害春种菜用大豆,9-10月份为害夏种菜用大豆.筛豆龟蝽有2种卵寄生蜂:黑蝽卵跳小蜂(Ooencyrtus nezaraeIsh ii)和蝽小缘腹细蜂[Asolcus m inor(W atanabe)](中国新记录).其中黑蝽卵跳小蜂是优势种,对筛豆龟蝽种群的控制起主要作用.

Globular stink bug, Megacopta cribraria （Fabricius） （Hemiptera： Plataspidae） is an important pest of vegetable soybean in Fuzhou, Fujian. The pest annually develops 3 generations. It overwinters with the adult. The adults break hibernation in middle or late March. Both the adults and the nymphs feed on the stem, leaves or pods of soybean. The peak of population density in the fields of this pest was found from May to June or from September to October. Two species of egg parasitoids, Ooencyrtus rtezarae Ishii （Hymenoptera： Encyrtidae） and Asoleus minor （Watanabe） （Hymenoptera： Scelionidae）, were found in M. cribraria. A. minor is a new record from Chfna. Both parasitoids can be found from middle May to late October. O. nezarae is a dorminant natural enemy while A. minor has lower parasitism in fields.