对Bt玉米产生田间进化抗性的草地贪夜蛾（J.E. 史密斯）对Bt杀虫剂敏感。
Spodoptera frugiperda (J.E. Smith) with field-evolved resistance to Bt maize are susceptible to Bt pesticides.
作者信息
Jakka S R K, Knight V R, Jurat-Fuentes J L
机构信息
Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN 37996, USA.
Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN 37996, USA.
出版信息
J Invertebr Pathol. 2014 Oct;122:52-4. doi: 10.1016/j.jip.2014.08.009. Epub 2014 Sep 8.
Field-evolved resistance to maize event TC1507 expressing the Cry1Fa toxin from Bacillus thuringiensis (Bt) was detected in populations of Spodoptera frugiperda from Puerto Rico. We tested for cross-resistance to purified Cry1A toxins and commercial Bt pesticides in susceptible (Benzon) and TC1507-resistant (456) strains of S. frugiperda. Larvae from the 456 strain exhibited cross-resistance to Cry1Ab and Cry1Ac toxins, while no differences in susceptibility to XenTari WG and DiPel ES pesticides were detected. These data support cross-resistance to toxins that share binding sites with Cry1Fa and no cross-resistance to Bt pesticides in S. frugiperda with field-evolved resistance to Bt maize.
在来自波多黎各的草地贪夜蛾种群中检测到了对表达苏云金芽孢杆菌（Bt）Cry1Fa毒素的转基因玉米事件TC1507产生的田间进化抗性。我们测试了草地贪夜蛾敏感品系（Benzon）和TC1507抗性品系（456）对纯化的Cry1A毒素和商业化Bt杀虫剂的交叉抗性。456品系的幼虫对Cry1Ab和Cry1Ac毒素表现出交叉抗性，而对XenTari WG和DiPel ES杀虫剂的敏感性未检测到差异。这些数据支持对与Cry1Fa共享结合位点的毒素存在交叉抗性，而对具有Bt玉米田间进化抗性的草地贪夜蛾中的Bt杀虫剂不存在交叉抗性。
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