They’re green. They’re flowery. And to many of the insects that ravage crops in Africa, they’re deadly.

Call it a “back to nature” approach to pest management: With infestations still threatening the food security of many smallholder farmers in Africa and global demand growing for produce free of synthetic pesticides, researchers say it is high time to tap African farmers’ knowledge of naturally occurring pesticides to make such botanical solutions efficient, affordable and accessible.

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