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对绣球花Hydrangea macrophylla、茄子Solanum melongena和玉米Zea mays3种植物上朱砂叶螨Tetranychus cinnabarinus天敌昆虫种类及发生数量进行调查,并采用优势度指数评价其优势种,结果表明,3种寄主植物上天敌的种类及其优势种有所不同,绣球花上有深点食螨瓢虫Stethorus punctillum、塔六点蓟马Scolothrips takahash-ii、食螨瘿蚊Acaroletes sp.和食螨隐翅虫Oligota sp.4种天敌,塔六点蓟马和深点食螨瓢虫为优势种;茄子上有塔六点蓟马、微小花蝽Orius minutus、食螨瘿蚊和深点食螨瓢虫4种天敌昆虫,塔六点蓟马为优势种;玉米上有深点食螨瓢虫、塔六点蓟马和食螨瘿蚊3种天敌昆虫,深点食螨瓢虫为优势种。通过测定各种天敌成虫和幼虫对朱砂叶螨成螨、若螨、幼螨和卵的日捕食量,并引入相对差距和法评价优势种天敌昆虫,结果表明,深点食螨瓢虫和微小花蝽是朱砂叶螨的优势种天敌。
The species and the number of natural enemies of Tetranychus cinnabarinus on Hydrangea macrophylla, Solanum melongena and Zea mays were investigated, and the dominance index was used to evaluate their dominant species. The results showed that the predators of three host plants Species and their dominant species are different, there are depths on hydrangea ladybug Stethorus punctillum, tower six-point thrips Scolothrips takahash-ii, Acaroletes sp. And Clostridium molitor Oligota sp.4 kinds of natural enemies , Tower six thrips and deep point mites ladybugs as the dominant species; eggplant on the tower six o’clock thrips, micro-stink bug Orius minutus, food mites and mosquito mites ladybug deep four kinds of natural enemies of insects, tower six Point thrips as the dominant species; corn on the depth of food mites ladybug, tower six thrips and food mite mites mosquito 3 kinds of natural enemies of insects, deep mites ladybugs for the dominant species. By measuring the predation rates of adult mites and larvae of adult natural enemies on adult mites, nymphs, larvae and eggs of the Tetranychus cinnabarinus and introducing relative differences and methods to evaluate the dominant species of natural enemies, the results showed that the deep- Is the dominant species of verbena spider mites.