茶园3种害虫与蜘蛛天敌种群动态的关系

Relationships among three main pests and their natural enemies of spiders in tea garden

采用灰色系统分析法、生态位分析法和空间格局聚集强度指标分析方法,分析了茶园3种鳞翅目主要害虫与蜘蛛天敌在数量、时间和空间上的关系。结果表明:茶尺蠖(Ectropis obliquaProut)的主要天敌是八点球腹蛛(Theridion octomaculatum)、斑管巢蛛(Clubiona reichini)、草间小黑蛛(Erigonidium graminicolum)、鞍型花蟹蛛(Xysticus ephippiatus)和茶色新圆蛛(Neosconatheisi),茶叶斑蛾(Eterusia aedeaL.)的主要天敌是斑管巢蛛、鞍型花蟹蛛、八点球腹蛛、茶色新圆珠和三突花蟹蛛(Misumenops tricuspidatus),茶卷叶蛾(Homona coffearia Nieter)的主要天敌是三突花蟹蛛、斑管巢蛛、鞍型花蟹蛛、茶色新圆珠和八点球腹蛛;3种害虫及其天敌种群聚集均数λ均小于2,且聚集是由环境因子所致。

Analysis on the quantity,time and spatial patterns of threet pests of Lepidoptera and their natural enemies were conducted with grey system analysis,ecological niche analysis and collective intention analysis of spatial framework in order to protect and use the natural enemies of spiders rationally. The three pests of Lepidoptera were Ectropis obliqua,Eterusia aedea and Homona coffearia. The synthetic ranking results indicated that the dominant natural enemies of Ectropis obliqua were in order of Theridion octomaculatum,Clubiona reichini,Erigonidium graminicolum,Xysticus ephippiatus and Neoscona theisi in order; the dominant natural enemies of Eterusia aedea were in order of Clubiona reichini,Xysticus ephippiatus,Theridion octomaculatum,Neoscona theisi and Misumenops tricuspidatus in order;the dominant natural enemies of Homona coffearia were in order of Misumenops tricuspidatus,Clubiona reichini,Xysticus ephippiatus,Neoscona theisi and Theridion octomaculatum in order.Gathering averages of the three pests and their natural enemies were less than two due to the environmental factors.