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通过室内和田间试验及抽样调查,初步探讨了马尾松毛虫卵密度对其三种主要寄生蜂——松毛虫赤眼蜂、松毛虫黑卵蜂和白跗平腹小蜂的寄生效率的影响以及各寄生蜂在卵块单位上的相互作用.研究发现,随着生境单位(这里为单株树)卵块数的增加,松毛虫赤眼蜂和松毛虫黑卵蜂的发现卵块数相应增加,但白跗平腹小蜂的这一反应不明显;随着卵块的增大,各蜂的卵块发现率和发现卵块寄生卵粒数亦相应增加,但发现卵块寄生率呈相反趋势;在卵块大小相同的情况下,白跗平腹小蜂的寄生卵数大于其它两蜂;在搜寻寄主卵块时,松毛虫赤眼蜂和松毛虫黑卵蜂有相互离异的趋势,而松毛虫赤眼蜂和白跗平腹小蜂有相互吸引的趋势。
The effects of eggs density of Masson pine caterpillar on the parasitic efficiency of three major parasitic wasps, Trichogramma dendrolimi, Dendrolimus punctatus and Coccinella septempunctata, were preliminary studied through laboratory and field tests and sampling surveys. As well as the interaction of parasitoids on egg blocks.The study found that the number of eggs found on Trichogramma dendrolimi and Dendrolimus punctatus increased with the increase of the number of eggs in the habitats With the increase of egg mass, the discovery rate of egg mass of each bee and the number of parasitic egg mass of egg mass also increased correspondingly, but the egg mass parasitism rate showed the opposite trend. When egg mass was the same , The number of parasitoid eggs was greater than that of the other two bees in the case of Baphicanthus asphodelus, while there was a trend of divergence between Trichogramma dendrolimi and Dendrolimus punctatus跗 flat belly wasps have mutual attraction trend.