Methomyl-40%WP is a formulation of Insecticide.Methomyl is a broad-spectrum insecticide that is used to kill insect pests.[6] Methomyl is registered for commercial/professional use under certain conditions on sites including field, vegetable, and orchard crops; turf (sod farms only); livestock quarters; commercial premises; and refuse containers. Products containing 1% Methomyl are available to the general public for retail sale, but more potent formulations are classified as restricted-use pesticides: not registered for homeowner or non-professional application.[6] However, Heliothis virescens developed a resistance to methomyl within 5 years.[7] Other species like Helicoverpa assulta also developed resistance after exposure.