By Jamie Martin
A new study highlights the risks of overreliance on (Bacillus Thuringiensis) Bt maize, showing that excessive planting has reduced its effectiveness in controlling corn rootworms in the U.S. Corn Belt. This has led to higher pest resistance, increasing economic losses for farmers.
Research over 12 years from 10 states shows that overuse of genetically modified maize targeting corn rootworms has reduced its effectiveness, resulting in financial losses for farmers.
Bt maize was introduced to minimize the need for chemical pesticides, but excessive planting has allowed pests to develop resistance, reducing its benefits. Data suggests that farmers often plant more Bt maize than necessary, particularly in the eastern Corn Belt, where crop rotation naturally lowers pest pressure.
The study indicates that an overreliance on Bt maize without alternative pest management strategies has worsened resistance issues. Instead of solely relying on Bt technology, experts suggest diversifying seed supplies and integrating sustainable pest control methods.
“Farmers generally planted more Bt maize than the optimum across the US Corn Belt, suggesting misperceptions of the costs and benefits,” researchers noted.
To preserve the effectiveness of Bt crops, experts recommend a balanced approach, including crop rotation, non-Bt maize planting, and improved pest monitoring. Sustainable farming practices will be essential to maintaining long-term agricultural productivity and avoiding further economic losses in the industry.
Photo Credit: gettyimages-yasonya
Categories: National