New designer toxins kill Bt-resistant insect pests

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Holding a cotton boll with a pink bollworm caterpillar inside. Credit: Timothy Dennehy
Holding a cotton boll with a pink bollworm caterpillar inside. Credit: Timothy Dennehy

A new way to combat resistant pests stems from discovering how the widely used natural insecticide Bt kills insects. Figuring out how Bt toxins punch holes in the cells of an insect's gut was the key to designing the new toxins, according to a Mexico-U.S. research team.


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