草地贪夜蛾和斜纹夜蛾卵块表面鳞毛层对夜蛾黑卵蜂寄生效能的影响

Plant Protection(2020)

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Abstract
草地贪夜蛾Spodoptera frugiperda是近期入侵我国的重大迁飞性害虫.夜蛾黑卵蜂Telenomus remus是鳞翅目夜蛾科害虫卵期的重要寄生性天敌.本试验以有和无鳞毛层的草地贪夜蛾和斜纹夜蛾S.litura卵为寄主,揭示寄主卵块表面鳞毛层对夜蛾黑卵蜂寄生适应性的影响.结果 表明:两种寄主的卵块,无论有无鳞毛层,夜蛾黑卵蜂对卵块寄生率均达到100%,卵粒寄生率均超过95%;且对夜蛾黑卵蜂子代羽化率和个体大小均无显著影响.但无论有无鳞毛层,斜纹夜蛾卵中夜蛾黑卵蜂的羽化率均显著高于草地贪夜蛾.研究结果说明寄主卵块表面的鳞毛对夜蛾黑卵蜂的寄生作用无显著影响.
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