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Adult Exposure to Bt Toxin Cry1Ac Reduces Life Span and Reproduction of Resistant and Susceptible Pink Bollworm (Lepidoptera: Gelechiidae)

文献类型： 外文期刊

作者： Wang, Ling 1 ; Wan, Peng 2 ; Cong, Shengbo 2 ; Wang, Jintao 3 ; Huang, Minsong 2 ; Tabashnik, Bruce E. 4 ; Li, Xianchu 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China

2.Hubei Acad Agr Sci, Inst Plant Protect & Soil Fertil, Wuhan 430064, Peoples R China

3.Huazhong Agr Univ, Hubei Insect Resources Utilizat & Sustainable Pes, Wuhan 430070, Peoples R China

4.Univ Arizona, Dept Entomol, Tucson, AZ 85721 USA

关键词： Pectinophora gossypiella;Bacillus thuringiensis;adult life span;reproduction

期刊名称：JOURNAL OF ECONOMIC ENTOMOLOGY （ 影响因子：2.381； 五年影响因子：2.568 ）

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收录情况： SCI

摘要： Insecticidal proteins from Bacillus thuringiensis (Bt) are used widely in sprays and transgenic plants to control insect pests. Although much research has elucidated the effects of Bt toxins on larvae, relatively little is known about their effects on adults. Here, we evaluated the effects of exposing adults to Bt toxin Cry1Ac on the life span and reproduction of two strains of pink bollworm (Pectinophora gossypiella (Saunders)). In larval diet bioassays, the concentration of Cry1Ac killing 50% of larvae (LC50) was 640 times higher for the laboratory-selected resistant strain (AZP-R) than the susceptible strain (APHIS-S). In experiments with adults, the highest concentrations of Cry1Ac tested (160 and 640 mu g Cry1Ac per ml of 5% honey water) reduced life span for both strains. Treatments with 10, 40, and 160 mg Cry1Ac per ml reduced the duration of the oviposition period as well as the number of eggs laid by both strains, but did not affect the percentage of pairs producing eggs, the duration of the preoviposition period, or the percentage of eggs hatching for either strain. Adult life span did not differ between strains at low to moderate concentrations of Cry1Ac, but it was significantly greater for the resistant strain than the susceptible strain at the two highest concentrations of Cry1Ac tested. The reduced susceptibility to high concentrations of Cry1Ac in adults of the AZP-R strain relative to the APHIS-S strain provides the first evidence of expression of resistance to a Bt toxin in adult Lepidoptera.

  • 相关文献

[1]Emergence, Mating and Oviposition Behavior of the Chinese Population in Pink Bollworm, Pectinophora gossypiella (Lepidoptera: Gelechiidae). Wi Huai-heng,Wu Kong-ming,Wi Huai-heng,Huang Min-song,Wan Peng,Wyckhuys, Kris A. G.. 2013

[2]Insulin-like peptides regulate vitellogenesis and oviposition in the green lacewing, Chrysopa septempunctata. Zhang, G. C.,Zeng, F. F.,Mao, J. J.,Liu, C. Y..

[3]Thuringiensin: A Thermostable Secondary Metabolite from Bacillus thuringiensis with Insecticidal Activity against a Wide Range of Insects. Liu, Xiaoyan,Ruan, Lifang,Peng, Donghai,Li, Lin,Sun, Ming,Yu, Ziniu. 2014

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