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Approval of New Chemical-Resistant GMOs Likely to Prompt ... · The “pesticide treadmill” occurs when insects “become resistant to the effects of pesticides, requiring farms to adopt new and more potent poisons, to which pests eventually become resistant.”. DDT was greeted as a war hero when it was used to combat malarial mosquitoes in World War II, but only a few years after it was introduced in ... Opinion | Approval of New Chemical-Resistant GMOs Likely ... · The "pesticide treadmill" occurs when insects "become resistant to the effects of pesticides, requiring farms to adopt new and more potent poisons,…