Varying Susceptibility to Methomyl and Permethrin in Widely Separated Cabbage Looper (Lepidoptera: Noctuidae) Populations within Eastern North America
نویسندگان
چکیده
J. Econ.Entomol.76: 987-989 (1983) ABSTRACT Cultures of Trichoplusia ni (HUbner), collected during 1980 from II eastern states and California, were assessed for susceptibility to methomyl and permethrin. T. ni were more susceptible to permethrin than methomyl, and the ratio of LD", values (methomylto permethrin) within each location ranged from 28:1 to 691:1. LDsovalues for permethrin varied by a factor of 15 between locations, compared with 8.2 for methomyl. LDsovalues for the California culture were similar to those of its eastern counterparts. There was no significant trend indicating that susceptibility to methomyl influenced susceptibility to permethrin. Although susceptibility to methomyl varied between geographic strains, there was no consistent pattern of increased tolerance in northern populations due to migration during a single growing season.
منابع مشابه
Genetic analysis of cabbage loopers, Trichoplusia ni (Lepidoptera: Noctuidae), a seasonal migrant in western North America
Long-range migrations of many wind-borne noctuid moths will have been influenced by the expansion of agriculture that provides greater availability of food plants along the migratory route. The migratory, agricultural pest, Trichoplusia ni (cabbage looper) over-winters in southern California and each summer migrates as far north as British Columbia. We explored the degree of genetic connectivit...
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