Effectiveness of Transgenic Bt Cottons against Noctuids in the Lower Rio Grande Valley of Texas
Effectiveness of Transgenic Bt Cottons against Noctuids in the Lower Rio Grande Valley of Texas
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DOI：
10.3958/059.035.0406
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发表时间：
2010-12-01
影响因子：
0.4
通讯作者：
Adamczyk, J. J.
中科院分区：
文献类型：
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作者：
Greenberg, S. M.;Adamczyk, J. J.
2004-2008年在德克萨斯州下里奥格兰德河谷评价了苏云金芽孢杆菌Bollgard、Bollgard II、Wide Strike和非转Bt基因棉对棉铃虫Helicoverpa zea(Boddie)、秋粘虫Spotoptera rugiperda(J.E.Smith)、甜菜夜蛾Spotoptera exigua(Hubner)和卷心菜环纹夜蛾Trichoplsia ni(Hubner)的防治效果。当夜蛾数量较多时，在整个生长季节，Bollgard II棉花的叶片或果实受到的伤害明显较小，与非Bt棉花相比，存活幼虫较少。由于鳞翅目昆虫很少到中等程度，具有这两个Bt性状之一的棉花也有类似的危害。在具有Bollgard、Bollgard II、Wide Strike或非Bt性状的棉花上使用一种杀虫剂，与未处理的棉花相比，棉铃虫和甜菜粘虫幼虫显著减少，对果实结构的损害也较小。甜菜夜蛾幼虫在非转Bt基因棉上的存活率和对叶片的危害比Bollgard II或广枯棉高3.6倍，比具有Bollgard特性的棉花品种高1.5倍。
The comparative efficacy of Bacillus thuringiensis (Berliner) Bollgard, Bollgard II, Wide Strike, and non-Bt expressing cotton, Gossypium hirsutum L., for control of the noctuid complex of bollworm, Helicoverpa zea (Boddie); fall armyworm, Spodoptera frugiperda (J. E. Smith); beet armyworm, Spodoptera exigua (Hubner); and cabbage looper, Trichoplusia ni (Hubner); was evaluated in the Lower Rio Grande Valley of Texas during 2004-2008. When noctuids were abundant, leaves or fruit were significantly less damaged and fewer live larvae were found on Bollgard II cotton compared with non-Bt cotton throughout the growing season. With few to moderate Lepidoptera, cotton with either of the two Bt traits had similar damage. One insecticide application to cotton with Bollgard, Bollgard II, Wide Strike, or non-Bt traits resulted in significantly fewer bollworm and beet armyworm larvae and less damage on fruiting structures compared to nontreated cotton. Beet armyworm larval survival and damage to leaves on non-Bt cotton were 3.6-fold greater than on Bollgard II or Wide Strike cotton and 1.5-fold greater than on cotton varieties with the Bollgard trait.