Resistance of Cotton Bollworm to Bt Cotton in China
Author Information
Author(s): Zhang Haonan, Yin Wei, Zhao Jing, Jin Lin, Yang Yihua, Wu Shuwen, Tabashnik Bruce E., Wu Yidong
Primary Institution: Nanjing Agricultural University
Hypothesis
Does intensive planting of Bt cotton lead to resistance in cotton bollworm populations in northern China?
Conclusion
The study found that cotton bollworm populations in northern China have developed resistance to the Bt toxin Cry1Ac due to intensive planting of Bt cotton.
Supporting Evidence
- Laboratory bioassays showed significantly lower susceptibility to Cry1Ac in northern China compared to northwestern China.
- Resistance ratios for Cry1Ac were calculated, showing a significant increase in resistance in northern populations.
- Survival rates at diagnostic concentrations indicated higher resistance in northern China populations.
Takeaway
Farmers in northern China have planted a lot of Bt cotton, and now the pests that eat it are becoming resistant to the poison it produces.
Methodology
The study involved collecting and testing cotton bollworm larvae from various locations in northern and northwestern China to assess their susceptibility to Bt toxins.
Limitations
The study primarily focused on two regions in China and may not represent resistance patterns in other areas.
Participant Demographics
The study involved cotton bollworm populations from northern and northwestern China.
Statistical Information
P-Value
0.0095
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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