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新疆南部转基因棉区棉铃虫种群长期动态研究

, PP. 520-526

Keywords: 棉铃虫(Helicoverpa,armigera),种群动态,灯光诱集,转基因抗虫棉,新疆

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Abstract:

(Bacillusthuringiensis)基因抗虫棉在新疆南部推广已超过10a,为探索Bt棉大面积种植对棉铃虫(Helicoverpaarmigera)种群动态的影响,于1999—2010年使用诱虫灯监测了Bt棉大面积种植区域(麦盖提)和非Bt棉大面积种植区域(阿瓦提)棉铃虫的种群动态。结果表明新疆南部地区20世纪90年代末发生棉铃虫害较重,2000—2004年种群数量保持较高水平;自2005年Bt棉大面积推广以后,Bt棉区棉铃虫的种群数量显著下降,棉铃虫种群数量随Bt棉种植比例的上升而下降(P<0.05);]随着Bt棉大面积推广年数的增加,Bt棉区棉铃虫各代种群数量均逐渐下降,第二代种群数量和高峰期蛾量下降速率均较越冬代和第一代快,且第二代棉铃虫种群相对丰富度也逐渐下降。因此,新疆地区Bt棉的大面积种植能较好地控制棉铃虫的种群数量,而且对第二代棉铃虫种群的控制效果最好。

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