《环境昆虫学报》

在室内条件下研究了圆果大赤螨对桑树害虫朱砂叶螨、桑蓟马和桑粉虱的捕食作用。结果表明，圆果大赤螨对3种猎物的捕食功能反应均符合Holling Ⅱ功能反应模型，经χ2检验，理论值与观测值差异不显著。捕食功能反应参数表明圆果大赤螨对桑蓟马、朱砂叶螨和桑粉虱捕食量差异显著，其最大日捕食量理论值分别为：416.67、222.22、97.09头。圆果大赤螨对猎物的搜寻效应均随猎物密度的增加而呈线性下降，且取食桑蓟马的搜寻效应明显高于朱砂叶螨和桑粉虱。Holling Ⅲ型功能反应新模型拟合得出，1头圆果大赤螨对桑蓟马、朱砂叶螨、桑粉虱的最佳寻找密度分别为77.54头、70.49头和27.27头。研究表明，圆果大赤螨对桑树害虫捕食能力依次为桑蓟马＞朱砂叶螨＞桑粉虱，且对3种害虫均具有较强捕食能力，是桑园害虫的重要天敌资源。

英文摘要:

Predatory function responses of Anystis baccarum adults to Pseudodendrothrips moriNiwa,Tetranychus cinnabarinus Boisduv andPealius mori (Takahashi)were measured in laboratory. Results showed that the functional responses ofA.baccarum adults to the three prey density fitted well with Holling Ⅱ model. And there were no significant differences between theoretic values and the observed values by Chi square test. The predatory capacities between A.baccarum and three prey species was significant differences and the maximum daily predatory capacities of A.baccarum adultsPs.mori,T.cinnabarinusand Pe.mori were 416.7, 222.2, 97.1 pests/day, respectively. Searching rate of A.baccarumdecreased with the increase in prey density and that was highest on Pseudodendrothrips mori than on Tetranychus cinnabarinus and the best seeking density was about 77.5, 70.5, 27.3 pests per predator according to Holling Ⅲ new functional response model.Altogether, the predatory capacities of A.baccarumto the prey was Ps.mori>T.cinnabarinus>Pe.mori. A.baccarumhas strong predation function to three species pests, and it was an important natural enemies of pests resource in mulberry field.

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