Influence of Host
Plants on Insecticide Metabolism and Management of Variegated Cutworm¹ ²
R. E. BERRY, S. J. YU, AND L. C. TERRIERE
Department of Entomology, Oregon State University, Corvallis, OR 97331
© Entomological Society of America
J. Econ. Entomol. 73: 771-774 (1980)
Midgut microsomal aldrin epoxidase of Peridroma saucia (Hübner), when fed
peppermint leaves Mentha piperita L., was up to 9 times more active than larvae
that were fed leaves of other host plants, such as, alfalfa, Medicago sativa L.,
bush snap beans, Phaseolus vulgaris L., garden beets, Beta vulgaris L.,
or a weed host, curly dock, Rumex crispus L. Epoxidase levels in larvae fed
peppermint leaves were ca. 6 times more active than those fed a semi-defined artificial
diet. Larvae collected from peppermint fields had higher levels of the enzyme than
laboratory-reared cutworms, and activity was much higher in instars 5-6 than in instar 4.
Larvae fed peppermint leaves were more tolerant of acephate, methomyl, and malathion than
larvae fed bush snap bean leaves.