Pathogenicity of Native Entomopathogenic Fungus Nomuraea rileyi Against Spodoptera litura | Zendy

Mahesh S. Padanad | Zendy; P. U. Krishnaraj | Zendy

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Pathogenicity of Native Entomopathogenic Fungus Nomuraea rileyi Against Spodoptera litura

Author(s) -

Mahesh S. Padanad,

P. U. Krishnaraj

Publication year - 2009

Publication title -

plant health progress

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.565

H-Index - 9

ISSN - 1535-1025

DOI - 10.1094/php-2009-0807-01-rs

Subject(s) - spodoptera litura , biology , instar , helicoverpa armigera , spore , entomopathogenic fungus , conidium , pathogenicity , veterinary medicine , entomopathogenic fungi , fungus , botany , larva , microbiology and biotechnology , biological pest control , beauveria bassiana , medicine

The entomopathogenic fungus Nomuraea rileyi was isolated from Spodoptera litura and Helicoverpa armigera insect cadavers collected from different sampling sites. Pathogenicity of ten N. rileyi isolates against Spodoptera litura was studied by exposing third instars to topical application of a spore concentration of 10⁸ conidia/ml. All ten isolates of N rileyi were active against third instars of S. litura, resulting in 85 to 97% mortality. However, there were statistically no significant differences among the isolates with respect to the pathogenicity levels. Median lethal time (LT₅₀) values of N. rileyi isolates against third instars of S. litura ranged from 5.5 to 6.6 days, which were not statistically different. This strongly suggests that the isolates from different geographical locations are equally pathogenic against S. litura.

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