Endeavor insecticide belongs to a new class of chemistry that safely eliminates sap-sucking aphids and whiteflies with its unique mode of action. As the aphid begins to "tap" into a plant treated with Endeavor, its sucking mechanism is immediately and irreversibly paralyzed-the aphid pulls out its stylets. With no harm to beneficial insects or mites, and no further harm to the plants, the aphid dies within 2 to 4 days. Endeavor is also extremely effective against sap-sucking whiteflies.