STRAIN DIFFERENCES IN THE INDIAN MEAL MOTH, PLODIA-INTERPUNCTELLA, INRESPONSE TO A GRANULOSIS-VIRUS

Three strains of the Indian Meal Moth, Plodia interpunctella, were com pared in terms of their response to a granulosis virus under different environmental conditions. A significant difference in the relative su sceptibilities to the virus of the three laboratory strains was establ ished. Evidence of potential trade-offs with resistance was found in o verall fecundity, pupal size and mortality at adult emergence. There w as however little evidence that a reduction in resource level led to m ore trade-offs being apparent. No clear relationship was found between resistance to the lethal effects of the virus and susceptibility to t he sublethal effects of the virus.