用转基因棉籽作平菇培养料时平菇主要害虫的发生动态

为了评估转基因棉籽对平菇害虫发生的影响，利用转Bt基因棉籽及其亲本对照棉籽配制平菇培养的菌棒，在菇棚中自然感虫，观察了平菇厉眼菌蚊、粪蚊、蚤蝇和螨类的发生情况。结果表明，含对照棉籽菌棒中平菇厉眼菌蚊和螨类发生量高于含转基因棉籽菌棒， 随着棉籽浓度的增加，对照棉和转Bt基因棉对平菇厉眼菌蚊均表现出抑制作用。对照棉籽对粪蚊的抑制作用比转Bt基因棉籽强，但随着棉籽浓度的增加，含对照棉籽菌棒中粪蚊发生量呈递增趋势。随着棉籽浓度的增加，含对照棉籽菌棒中蚤蝇发生量呈递增趋势，含转Bt基因棉籽菌棒中蚤蝇发生量递减；低含量时对照棉籽对蚤蝇的抑制作用强，而高含量时转Bt基因棉籽对蚤蝇的抑制作用强。

Population dynamics of main pests in the culture containing transgenic Bt cottonseeds for the mushroom Pleurotus ostreatus

For evaluating the effects of transgenic Bt cottonseeds, the population dynamics of main dipteran and mite pests in the cultures containing transgenic Bt cottonseeds and non-transgenic cottonseeds for the mushroom Pleurotus ostreatus planted in the cage were investigated. The results showed that the population of Lycoriolla pleuroti and mites in the culture containing non-transgenic cottonseeds was higher than in the culture containing transgenic cottonseeds. With the increase of both transgenic and non-transgenic cottonseed content in the culture, the occurrence of L. pleuroti decreased. But for Scatopse spp., the effect of non-transgenic cottonseeds was stronger than that of transgenic cottonseeds, and the population of Scatopse spp. showed a clear decreasing tendency with the increase of the non-transgenic cottonseed content. With the increase of cottonseed content, the population of Megaselia spp. increased in the culture containing non-transgenic cottonseeds, but decreased in the culture containing transgenic cottonseeds. The effect of transgenic cottonseeds on Megaselia spp. was stronger than that of the non-transgenic cottonseeds when the content of cottonseed was low, while this tendency was in contrary when the content of cottonseed was high.