Cotton Bollworm Adapting to Bt Cotton in China via Diverse Mutations
Bruce E. Tabashnik and Yidong Wu ISB, Oct 2012
Monitoring data from China have provided an early warning of resistance to Bt cotton in the cotton bollworm, Helicoverpa armigera, a major lepidopteran pest of cotton. Bioassays show that the frequency of cotton bollworm resistance to Cry1Ac is higher in northern China, where Bt cotton has been grown intensively, than in areas of northwestern China where Bt cotton planting has been limited. Baseline data show that before Bt cotton was introduced in China, cotton bollworm susceptibility to Cry1Ac was not lower in northern China than in north-western China, which implies that exposure to Bt cotton in northern China selected for resistance to Cry1Ac.
2012-10-31 15:03:39
Source: http://gmopundit.blogspot.com/2012/11/cotton-bollworm-adapting-to-bt-cotton.html
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