Department of Agroecology, Aarhus University, Flakkebjerg, Slagelse, Denmark.
Pest Manag Sci. 2013 May;69(5):602-6. doi: 10.1002/ps.3410. Epub 2012 Oct 9.
The effect of transgenic maize (Zea mays L.) containing a lepidopteran-specific Bt toxin on a stored-product pest, Sitophilus zeamais Motschulsky, and its parasitoid, Lariophagus distinguendus Förster, was examined in the laboratory to test the impact of transgenic maize on stored-product pests and their biological control.
Weevils were not harmfully affected by transgenic Bt maize in their development characteristics (development time, body mass), and females emerging from transgenic maize kernels were larger. However, significantly fewer parasitoid females emerged from weevils that developed in transgenic kernels, although parasitoids did not develop more slowly and were not different in size or mass from their conspecifics emerging from hosts in non-transgenic maize kernels.
The emergence of female parasitoids was reduced in transgenic Bt maize, and this effect cannot be explained by the known lepidopteran-specific toxicity of Bt Cry1Ab toxin.
为了检验转 Bt 基因玉米对仓储害虫及其天敌的影响，研究人员在实验室中对转 Bt 基因玉米对仓储害虫和其生物防治的效果进行了研究。
转 Bt 基因玉米对玉米象的发育特征（发育时间、体重）没有不良影响，而且从转 Bt 基因玉米中孵出的雌虫更大。然而，从转 Bt 基因玉米中孵出的玉米象中寄生蜂的雌虫数量明显减少，尽管寄生蜂的发育速度没有变慢，而且在体型或体重方面与从非转 Bt 基因玉米中孵出的同种寄生蜂没有差异。
在转 Bt 基因玉米中，雌性寄生蜂的出现减少了，而这一现象不能用 Bt Cry1Ab 毒素对鳞翅目昆虫的特异性毒性来解释。
