Masters Thesis

Indian meal moth, Plodia interpunctella (Hübner): a study of malathion resistance in some California populations.

Three out of five wild populations and a laboratory- population of Indian meal moth, Plodia interpunctella (Hubner), were found resistant to malathion. A malathion-susceptible Indian meal moth population, stressed with malathion, showed a 110-fold increase in resistance after five generations. Reciprocal crosses of malathion—resistant and -susceptible Indian meal moth populations showed that malathion—resistance was not a sex—linked character and the genes, while not simple, allowed for the rapid selection of resistance.