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棉花学报  2014 

湖南省部分地区棉田牛筋草(Eleusineindica)对高效氟吡甲禾灵的抗药性

DOI: 1002-7807(2014)03-0279-04, PP. 279-282

Keywords: 牛筋草,高效氟吡甲禾灵,抗药性,谷胱甘肽-S-转移酶

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Abstract:

为制定棉田恶性杂草牛筋草的防除策略和延缓抗性种群发展,采用整株测定法测定了湖南省部分地区棉田杂草牛筋草(Eleusineindica)对高效氟吡甲禾灵的抗药性水平,并通过测定谷胱甘肽-S-转移酶(GST)活力研究了牛筋草对高效氟吡甲禾灵的代谢抗性机制。整株法测定结果显示,相对于敏感的鼎城区种群,不同地区牛筋草种群对高效氟吡甲禾灵均产生了不同程度的抗药性,抗药性指数在2.4~18.4。其中汉寿牛筋草种群的抗性水平最高,其次是大通湖、湘阴种群。汉寿抗性牛筋草种群GST活力明显高于鼎城区敏感种群,表明GST对高效氟吡甲禾灵代谢能力的差异是牛筋草对高效氟吡甲禾灵产生抗药性的一个重要原因。

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