A new study has identified a scent receptor in mosquitoes that helps them sniff out and avoid trace amounts of pyrethrum, a plant extract used for centuries to repel biting insects. These findings ...

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The yellow center of the 'killer chrysanthemum' contains a natural toxin that is a powerful insecticide. This flower, the pyrethrum plant, contains a potent chemical that is made into an effective, ...

Berkeley -- A relatively benign compound contained in a widely used group of insecticides can mix with and increase the toxicity of existing pesticides in the environment, according to a new study led ...