A chemical that kills pests when it touches them, instead of by ingestion. Also, soil that contains the minute skeletons of certain algae that scratch and dehydrate waxy-coated insects.
Is a product which affects the pest when the pest is directly exposed to the product. Contact pesticide is usually skin absorbed.
A pesticide which results in the death of target plants, animals, insects or other organisms either from direct contact at the time of application or contact by the pest to residual deposit.