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Susceptibility of endemic and exotic North American ladybirds (Coleoptera: Coccinellidae) to endemic fungal entomopathogens

Key words. Coccinellidae, Beauveria bassiana, Olla v-nigrum, Coleomegilla maculata, Hippodamia convergens, Cycloneda munda, Harmonia axyridis, Coccinella septempunctata, entomopathogen, endemic

Abstract. We tested the laboratory susceptibility of four endemic and two exotic species of North American Coccinellidae to a single rate (2.5 × 10^sup 5^ conidia/ml) of Beauveria bassiana derived from different sources. The endemic species Olla v-nigrum, Cycloneda munda and Hippodamia convergens were susceptible to B. bassiana Isolate B which was originally isolated from O. v-nigrum and the rate assayed was known to represent the LC^sub 50^ against O. v-nigrum. However, neither the endemic C. ...

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