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Susceptibility of Helicoverpa armigera to two Bt toxins, Cry1Ac and Cry2Ab, in northwestern China: toward developing an IRM strategy

文献类型： 外文期刊

作者： Wang, Panpan 1 ; Ma, Jihong 2 ; Head, Graham P. 5 ; Xia, Deping 3 ; Li, Jing 6 ; Wang, Huiqing 6 ; Yang, Minglu 7 ; Xie, 1 ;

作者机构： 1.Ningxia Univ, Key Lab Grassland Ecol Cultivat, Ningxia 750021, Peoples R China

2.CAS Res Ctr Ecol & Environm Cent Asia, Urumqi 830011, Peoples R China

3.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresource Arid Land, Urumqi 830011, Peoples R China

4.Xinjiang Univ, Coll Resources & Environm Sci, Urumqi 830046, Peoples R China

5.Monsanto Co, St Louis, MO 63167 USA

6.Plant Protect Stn Xinjiang Uyghur Autonomous Reg, Urumqi 830049, Peoples R China

7.Tarim Univ, Coll Plant Sci, Alar 843300, Peoples R China

8.Xinjiang Acad Agr & Reclamat Sci, Shihezi 832000, Peoples R China

9.Univ Queensland, Sch Biol Sci, Brisbane, Qld 4072, Australia

关键词： Bt cotton; Susceptibility; Farming type; Resistance management; Seed mix refuge

期刊名称：JOURNAL OF PEST SCIENCE （ 影响因子：5.918； 五年影响因子：5.955 ）

ISSN： 1612-4758

年卷期： 2019 年 92 卷 2 期

页码：

收录情况： SCI

摘要： Extensive unofficial planting of Bt cotton expressing Cry1Ac toxin has occured for the past two decades in northwestern China, and no mandatory refuge policy has been adopted. The status of Cry1Ac susceptibility of Helicoverpa armigera in this region has not been routinely monitored, nor has the susceptibility to Cry2Ab cotton which has not been released in China. The susceptibility of H. armigera populations to both toxins was assessed in 2014 and 2015 in two contrasting cotton farming systems across the region. Over the 2years, the response to Cry1Ac of the nine H. armigera field populations sampled ranged from 3.16 to 16.94gml(-1) for LC50 and 0.013 to 0.741gml(-1) for IC50, and the baseline susceptibility of these strains to Cry2Ab ranged from 3.43 to 19.05gml(-1) for LC50 and 0.16 to 3.81gml(-1) for IC50. There was no significant difference in susceptibility to either Cry1Ac or Cry2Ab between small-holder and broad-acre farming. The susceptibility to Cry1Ac toxin in northwestern China is higher than that in northern China, while there was no difference for Cry2Ab between northwestern China and northern China. With high levels of adoption of Bt cotton and relatively limited natural refuge for H. armigera, it is important to consider resistance management measures for Bt cotton in northwestern China.

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