转Bt基因玉米对田间主要捕食性天敌安全性的影响

Effect of Transgenic Bt Corn on Safety of Main Predatory Natural Enemies in the Field

以MC2884(转Bt基因玉米杂交种)、2884(受体玉米)和东农250等3种玉米品种为试验材料,探讨转Bt基因玉米对田间瓢虫、蜘蛛、草蛉等田间天敌安全性的影响。结果表明:当地品种东农250对照区、东农250化防区、MC2884区和2884区4种田间天敌的种群动态变化趋势基本一致。方差分析表明,4个处理区之间天敌数量差异不显著。说明转Bt玉米对田间4种天敌数量及其种群消长动态没有影响,转Bt玉米对上述几种田间天敌安全。

With corns MC2884 （Bt corn）,2884 （receptor corn） and Dongnong250 as materials, the effect of transgenic Bt corn on the safety of natural enemy insects including ladybug, spider, lacewing and Orius minutus was studied in corn field. The result showed that the population dynamics of natural enemies was similar among these treatment plots of Dongnong250, Dongnong250 chemical control, MC2884 and 2884. The result of variance analysis showed that no significant differences were observed among the density of natural enemies in the four treatment plots,indicating that transgenic Bt corn had no effect on the density and population dynamics of the natural enemy insects and was safe to the above-mentioned natural enemy insects.