| 部分GK系列Bt棉对棉铃虫抗性的田间评价 |
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| 引用本文： | 吴孔明,郭予元,王武刚.部分GK系列Bt棉对棉铃虫抗性的田间评价[J].植物保护学报,2000,27(4):317-321. |
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| 作者姓名： | 吴孔明 郭予元 王武刚 |
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| 作者单位： | 中国农业科学院植物保护研究所,北京 |
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| 基金项目： | 国家科委863计划资助(Z17-02-06) |
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| 摘 要： | １９９７～１９９８年在河北省廊坊市和１９９８年在河南省新乡市分别研究了转ＣｒｙＩＡ Ｂｔ抗虫基因棉花ＧＫ－２、ＧＫ－５和ＧＫ－１２对棉铃虫的抗性水平。研究结果表明，ＧＫ－２和ＧＫ－１２在整个生育对棉铃虫皆保持极高的抗性，在对照普通棉花品种棉铃虫高峰期百株幼虫２代４４～１３８头，３代１１３～１３８头和４代１４４头密度下，对棉铃虫的控制效果分别达８８．７１％～９５．４５％、９２．７５％～９７．６５％和
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| 关 键 词： | CK Bt棉 棉铃虫 种群密度 抗虫性 |
FIELD RESISTANCE EVALUATIONS OF BT TRANSGENIC COTTON GK SERIES TO COTTON BOLLWORM |
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| Wu Kongming,Guo Yuyan and Wang Wugang.FIELD RESISTANCE EVALUATIONS OF BT TRANSGENIC COTTON GK SERIES TO COTTON BOLLWORM[J].Acta Phytophylacica Sinica,2000,27(4):317-321. |
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| Authors: | Wu Kongming Guo Yuyan and Wang Wugang |
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| Institution: | Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100094,Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100094 and Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100094 |
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| Abstract: | The resistance levels to cotton bollworm Helicoverpa armigera (Hubner) of Bt transgenic cotton GK series developed by the Biotechnology Research Center, CAAS were evaluated in Lang-fang of Hebei Province from 1997 to 1998 and in Xinxiang County, Henan Province in 1998. The results showed that GK-2 and GK-12 strains possessed high resistance to cotton bollworm in the whole growing season. The control efficiencies to the second, third and fourth generation cotton boll-worms were up to 88.71% - 95.45% , 92.75% - 97.65% and 93.33% , in comparison with the larval numbers per hundred plants of corresponding non-transgenic cotton varieties: were 44 -138, 113 - 138 and 144, respectively. The damage rates of the second and third generation boll-worms to cotton squares were controlled under 6.53 % , which resulted in 97.05 % - 393.77 % yield increases. The investigation in Bt cotton field also indicated that the major organs damaged by the first instar and second instar larvae were squares, and squares (41. 94 % ) and flowers (45.16%), as they got to the third instar, most of them mainly fed cotton bolls. It was indicated that there was no significant difference between feeding behavior of cotton bollworm to Bt cotton and common cotton. |
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| Keywords: | GK Bt transgenic cotton Helicoverpa armigera population dynamics cotton resis-tance |
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