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11.06.2019 |

First Canadian case of insect resistance to GM Bt corn discovered

Farmers in Nova Scotia have found that the European corn borer has developed resistance to the GM trait designed to kill it

In Nova Scotia, corn farmers are observing that the European corn borer, an insect pest, has developed resistance to the genetically engineered (genetically modified or GM) trait designed to kill it.

This is the first report in the world of the European corn borer (ECB) developing resistance to a genetically engineered trait used to confer insect resistance. It is also the first report in Canada of any insect pest developing resistance to a genetically engineered trait. The development of resistance in other insect pests targeted by Bt (Bacillus thuringiensis) traits in corn has been observed in the US, South Africa and Brazil. Additionally, in the US and other countries, some cotton pests have also developed resistance to Bt cotton traits.

“This is an important reminder that nature can adapt to and overcome genetically engineered traits,” said Lucy Sharratt of the Canadian Biotechnology Action Network.

The Canadian Corn Pest Coalition reported that some ECB populations have developed resistance to the Cry1F protein, which is one of at least eight genetically engineered Bt proteins used in Canada in genetically engineered insect-resistant corn.

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