Inheritance of Methomyl Resistance in the Tobacco Budworm (Lepidoptera: Noctuidae)

Abstract
A methomyl-resistant strain of Heliothis virescens (F.) was collected from cotton in Mexico during 1981. After one generation of laboratory selection, this strain showed about 41,000- to 65,000-fold resistance, depending on the weight of the third instars tested. Larvae that weighed 12–21 mg were harder to kill than those weighing 22–29 mg at the doses tested. Resistance appears to be due to a single autosomal incompletely dominant gene.