Photograph of Dichlorvos under the microscope

Dichlorvos is used primarily to control household pests such as flies, aphids, spider mites, caterpillars, and thrips. The chemical is also used therapeutically against parasitic worm infections in dogs, livestock, and humans. The mechanism of action appears to be a contact poison and stomach poison in insects caused by interference with cholinesterase, a neurological enzyme that is important to nerve transmissions.

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