Rhizophagus grandis(Coleoptera: Rhizophagidae) is an important predator of Dendroctonus valens which is an invasive alien pest attacking pine trees in *** was first introduced into China in 2000 and mass rearing techn...
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Rhizophagus grandis(Coleoptera: Rhizophagidae) is an important predator of Dendroctonus valens which is an invasive alien pest attacking pine trees in *** was first introduced into China in 2000 and mass rearing techniques had been developed by the authors since *** paper dealed with the study on the developmental threshold temperature and the effective accumulated temperature of *** result showed that the developmental threshold temperatures of egg,larva and pupae were 3.59±2.92 ℃,1.96±0.73 ℃ and 9.27±1.19 ℃ respectively,and the effective accumulated temperatures were 98.32±16.26 degree-day,296.94±12.45 degree-day and 449.67±53.19 degree-day ***,the total effective accumulated temperature from egg to pupa was 844.93 degree-day.
栗山天牛Massicus raddei(Blessig)是我国东北危害栎树的重要害虫。在对其进行生物防治研究中,通过功能反应实验方法探讨了利用寄生蜂白蜡吉丁肿腿蜂Sclerodermus pupariae Yang et Yao对栗山天牛低龄幼虫的寄生作用。结果表明:白蜡吉...
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栗山天牛Massicus raddei(Blessig)是我国东北危害栎树的重要害虫。在对其进行生物防治研究中,通过功能反应实验方法探讨了利用寄生蜂白蜡吉丁肿腿蜂Sclerodermus pupariae Yang et Yao对栗山天牛低龄幼虫的寄生作用。结果表明:白蜡吉丁肿腿蜂在取食寄主补充营养的过程中,对栗山天牛1～2龄小幼虫的致死作用随着寄主密度的增加而显著提高,功能反应符合HollingⅡ型方程,平均每日最大致死量为0.53头。寄生作用功能反应符合HollingⅠ型方程,寻找时间21d内的寄主密度阈限为4头。当该肿腿蜂密度固定为1头时,对栗山天牛致死作用和寄生作用的寻找效率均随寄主密度的上升而降低。当寄主密度固定不变时,随着寄生蜂密度的增加寄主的死亡数量线性升高,被寄生的寄主数量也上升,但该肿腿蜂对栗山天牛低龄幼虫致死作用和寄生作用的寻找效应均显著下降,表明白蜡吉丁肿腿蜂是防治栗山天牛低龄幼虫的良好天敌。研究结果对于合理评价白蜡吉丁肿腿蜂在生产上的控害能力和制定寄生蜂的林间释放应用技术规程提供了依据。
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