文献类型： 外文期刊

作者： Guo, Jianguo ¹ ; Yang, Fei ² ; Brown, Sebe ⁴ ; Kern, David ³ ; Head, Graham P. ⁵ ; Price, Paula A. ⁵ ; Niu, Ying ² ; Huan ¹ ;

作者机构： 1.Gansu Acad Agr Sci, Inst Plant Protect, Lanzhou 730070, Gansu, Peoples R China

2.Louisiana State Univ Agr Ctr, Dept Entomol, 404 Life Sci Bldg, Baton Rouge, LA 70803 USA

3.Texas A&M Univ, Dept Entomol, College Stn, TX 77843 USA

4.Louisiana State Univ Agr Ctr, Northeast Reg, Winnsboro, LA 71295 USA

5.Monsanto Co, St Louis, MO 63167 USA

关键词： Bt maize; Resistance management; Seed blend refuge; Corn earworm; Fecundity; Fitness

期刊名称：CROP PROTECTION （ 影响因子：2.571； 五年影响因子：3.11 ）

ISSN： 0261-2194

年卷期： 2019 年 124 卷

页码：

收录情况： SCI

摘要： Seed blend, also called 'refuge-in-the-bag (RIB)', has been used as a refuge strategy to generate susceptible insect populations for Bt maize resistance management in the U.S. Corn Belt. A major concern related to the use of RIB is the cross-pollination of maize plants that cause Bt protein expression in the kernels of refuge ears. Bt protein expression in the refuge ears can negatively affect the insect populations on refuge plants, especially for ear feeders such as the corn earworm, Helicoverpa zea (Boddie). The current study investigated the reproduction of three populations of H. zea collected from a pure stand of non-Bt maize and the refuge ears of 90:10% (Bt:non-Bt seeds) and 80:20% RIBs, as well as the growth, development and reproduction of the F-1 offspring of the three populations. The biological parameters measured for the F-1 offspring included neonate-to-pupa developmental time, pupal weight, neonate-to-adult survival rate, egg production, and net reproductive rate of the adults on meridic diet. Reproduction of the parents and the fitness of the F-1 offspring were similar among the three populations and were not significantly affected by the seed blending patterns. Information generated from this study will be useful in assessing if RIB is a suitable method for Bt maize resistance management in the southern U.S.