Researchers have discovered how certain flavonoids — a type of metabolic product from plants and other organisms — can kill yellow fever mosquito larvae. These compounds inhibit an enzyme, called Nobo, which is used to synthesize ecdysone, a key hormone in the life cycle of insects. The most efficient flavonoid tested, desmethylglycitein (DMG), could be used to make new types of insecticides to replace current ones, to which mosquitoes are becoming resistant.

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