INHERITANCE OF CARBARYL RESISTANCE AND MICROSOMAL OXIDASES IN THE FALL ARMYWORM (LEPIDOPTERA, NOCTUIDAE)

A strain of the fall armyworm, Spodoptera frugiperda (J.E. Smith), col lected from cornfields in Gainesville, FL, developed high levels of re sistance to carbaryl. Resistance was inherited as a single, incomplete ly dominant, autosomal gene. The resistance was associated with increa sed microsomal oxidase activities. Aldrin epoxidase and biphenyl hydro xylase activities were inherited in an intermediate or dominant manner in the two reciprocal F1 progeny, indicating the important role of th ese detoxification enzymes in carbaryl resistance.