蜚蠊卵啮小蜂生物学研究

Study on the Bionomics of Tetrastichus hagenowii Ratzeturg

黑胸大蠊是湖北省蜚蠊科中最主要的种类。蜚蠊卵啮小蜂是黑胸大蠊卵荚内寄生蜂，该蜂在湖北年发生３～４代，以预蛹或蛹在卵荚内越冬，翌年初夏开始羽化出蜂。在卵荚内发育历期各代不尽相同，主要与温度有关，随着气温升高发育历期渐短，成虫寿命６～１０ｄ。该蜂对黑胸大蠊卵荚自然寄生率３１．３１％～７２．３０％，平均为４９．４６％。成蜂雌雄性比为１∶０．８４～１∶０．１０，平均为１∶０．３３。蜚蠊卵啮小蜂对黑胸大蠊的发生危害有较强的控制作用，其生物防治利用前景广阔。

Periplaneta fuliginasa Serville is a dominant species of Blatidae in Hubei Prouince.Tetrastichus hagenowii,an endoparawitoid of the cockroach ,accurs for 3￣4 generation a year and overwinters with prepupae or pupae in cockroach ootheca.The adults emerge next early summer. The development stages of different generations of this wasp in cockroach ootheca vary negatively with temperature. Adult′s life-span ranges from 6￣10 days. Natural parasitiseal ratio of the cockroach by this female wasp varies from 31.31￣72.30% with an average of 49.46% . Sex ratio of adult wasps ranges from 1∶0.84 to 1∶0.10 with an average of 1∶0.33 .This wasp can effectively control the damage by the cockroach and has a broad prospect for application in biological contral of the cockroach