茶毛虫天敌的研究

本明确了茶毛虫天敌种类及其优势种：寄生性天敌中寄生卵的有赤眼蜂和茶毛虫黑卵蜂，其中茶毛虫绒茧蜂是优势种；寄生幼虫的有茶毛虫绒茧蜂、茶毛虫瘦姬蜂、小孢瘦姬蜂、日本黄茧蜂和寄蝇等，其中茶毛虫绒茧蜂是优势种；捕食性天敌有步行虫、蠼螋、蜘蛛和青蛙等，其中蜘蛛是优势类群，白斑猎蛛为优势种。研究了茶毛虫主要寄生性天敌的寄生率和寄生动态：茶毛虫黑卵蜂的寄生率为１５－２０％，越冬卵可高达４５％左右；茶毛虫绒茧蜂

A study on natural enemies of Euproctis pseudoconspersa Strand

By investigation and experiments, the natural enemies of tea caterpillar (Euproctis pseudoconspersa Strand) and their dominant species were verified. The egg parasitoids were Trichogramma sp. and Telenomus euproctidis Wilcox, and T. euproctidis was the dominant one. The larvae parasitoids was Apanteles conspersae Fiske, Henicospilus pseudoconspersae Sonan, Hymenobosimina sp., Holocremnus sp., Meteorus japonicus Ashmead, Tachina sp. and Exorista sp., and A. conspersae was the dominant one. Predacious enemies were Darabidae, Dermaptera, spider and fog, the spiders were the dominant population and Evarcha albaria was the dominant one. The study of the parasitism rate of major parasitical enemies show that the parasitism rate of T. euproctidis was 15-20% in general, up to 45% in the wintering egg, that of A. conspersae was about 20%, that of M. japonicus, Tachina sp. and Exorista sp. were 5-10%, respectively. The niche breadth of tea caterpillar and its natural enemies were estimated by means of investigating their single dimensional temporal and spatial niches. On temporal niches, the sequence of breadth was E. pseudoconspersa> E. albaria > A. conspersae >T. euproctidis > Tachina sp. and Exorista sp; On spatial niches, the sequence of breadth was E. pseudoconspersa > E. albaria > A. conspersae > Tachina sp. and Exorista sp.> T. euproctidis .