Susceptibilities of the Invasive Fall Armyworm (Spodoptera frugiperda) to the Insecticidal Proteins of Bt maize in China

文献类型： 外文期刊

第一作者： Wang, Wenhui

作者： Wang, Wenhui;Zhang, Dandan;Zhao, Shengyuan;Wu, Kongming;Wang, Wenhui;Zhao, Shengyuan;Zhang, Dandan

作者机构：

关键词： invasive fall armyworm; transgenic insect-resistant maize; Cry1Ab; Vip3Aa; susceptibility baseline; resistance management

期刊名称：TOXINS （ 影响因子：5.075； 五年影响因子：5.305 ）

ISSN：

年卷期： 2022 年 14 卷 8 期

页码：

收录情况： SCI

摘要： To control the fall armyworm (FAW), Spodoptera frugiperda (Smith), a serious threat to maize production in China, the Chinese government has issued biosafety certificates for transgenic insect-resistant maize expressing Bt (Bacillus thuringiensis) toxins including Bt-Cry1Ab maize (crop event DBN9936), Bt-Vip3Aa maize (event DBN9501), Bt-(Cry1Ab+Vip3Aa) maize with superimposed traits (event DBN9936 x DBN9501) and Bt-(Cry1Ab+Vip3Aa) maize with superimposed traits (event Bt11 x MIR162), but the susceptibility baselines of geographically distinct FAW populations to these events, which form the basis for managing resistance development in the pest to these events, are not clear. We used the diet-incorporated bioassays method to detect the susceptibilities of the seven FAW populations collected from Yunnan, Henan and Hubei provinces in China in 2021 to the insecticidal proteins of the four Bt maize events. The result showed that the susceptibilities of different geographical populations to Bt insecticidal proteins were significantly different. In the seven populations, the range in median lethal concentrations (LC50) of Cry1Ab expressed in DBN9936 was 0.87-2.63 mu g/g, 0.14-0.30 mu g/g for Vip3Aa expressed in DBN9501, 0.78-1.86 mu g/g for Cry1Ab+Vip3Aa expressed in DBN9936 x DBN9501, and 0.36-1.42 mu g/g for CryAb+Vip3Aa expressed in Bt11 x MIR162. The growth inhibition responses also showed that the susceptibilities varied with the different median growth inhibitory concentration (GIC(50)) ranges (0.38-1.22, 0.08-0.28, 0.28-0.87, and 0.24-0.78 mu g/g, respectively). The variations in the ranges of the susceptibility baselines of the geographical populations of fall armyworm in China to the insecticidal proteins expressed in the four events provide a scientific basis for monitoring FAW population resistance to Bt maize and managing the populations using different Bt maize events.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序