Biodiversity of Entomopathogenic Fungi Naturally Infecting Cabbage Aphid, Brevicoryne brassicae. L.

Abstract

Ten entomopathogenic fungi were recorded naturally associated with cabbage aphid. They were five hyphomycetes and five Zygomycetes (four Entomophthorales & one Mucorales). Six genera showed good epizootic beside their safety to plants. They were: Panadora neoaphidis, Conidiobolus obscurus, Neozygites fresenii, Entomophthora planchoniana, Cladosporium cladosporioides and Verticillium lecanii. Efficiency of these entomopathogenic fungi against Brevicoryne brassicae was evaluated under laboratory conditions. P. neoaphidis was the most efficient with LC 50 : 2.5417x 10 2 conidia/ml then, V. lecanii which showed LC 50 of 3.052x10 2 conidia/ml followed by C. obscurus which showed LC 50 of 3.161×10 2 conidia/ml, then, N. fresenii which recorded LC 50 of 8.536×10 2 conidia/ml. Then, C. cladosporioides showed LC 50 of 23.271×10 2 conidia/ml, then at last comes E. planchoniana with LC 50 of 70.593×10 2 .