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Effectiveness and chemical pest control of Bt-cotton in the Yangtze River Valley, China

文献类型： 外文期刊

作者： Xu, Naiyin 1 ; Fok, Michel 3 ; Bai, Lixin 4 ; Zhou, Zhiguo 1 ;

作者机构： 1.Nanjing Agr Univ, Key Lab Crop Growth Regulat, Minist Agr, Nanjing 210095, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Ind Crops, Nanjing 210014, Peoples R China

3.Ctr Int Cooperat Agron Res Dev CIRAD, F-34398 Montpellier, France

4.Jiangsu Acad Agr Sci, Inst Crop Protect, Nanjing 210014, Peoples R China

期刊名称：CROP PROTECTION （ 影响因子：2.571； 五年影响因子：3.11 ）

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收录情况： SCI

摘要： The paper determines what might be the factors beneath the limited or reduced effectiveness being observed in China. The analysis is based on the data collected for several years from many locations in the Yangtze River Valley Varietal Experiment Network. All varieties declared to be Bt-cotton were confirmed to have the Bt-gene, the expression of which was assessed in three ways: through the analysis of Bt-protein production and through indoor and outdoor bioassays. Gene expression varied substantially between varieties and between years for the few varieties which were tested in two subsequent years. The Bt-cotton varieties being sown cannot control bollworms totally and this led to spray chemicals regardless of the real infestation level. Farmers are hence paying high prices for varieties which are not totally resistant to bollworms and pest control costs are not reduced to the extent that they might expect, lowering the profitability of cotton production.

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