Virulence of Beauveria bassiana (Deuteromycetes) Strains Against the Coffee Berry Borer (Coleoptera: Scolytidae)

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The virulence of 9 strains of the fungus Beauveria bassiana (Balsamo) Vuillemin against the coffee berry borer, Hypothenemus hampei (Ferrari), was determined under laboratory conditions. Results show that B. bassiana is a potential microbial agent suitable for incorporation into a program of integrated control directed against H. hampei. The 3 most aggressive strains were Bb-4 (Ecuador), Bb-25 (Mexico), and Bb-26 (Mexico) with LC50s of 0.003,0.004, and 0.006%, respectively, which are equivalent to 2.2 X 106,4.1 X 106, and 5.9 X 106 conidia per milliliter of suspension. Mean lethal times (TL50) were between 4.3 and 7.5 d. The maximum percentage of cadavers that sporulated was obtained with strain Bb-25 at 90%, with 81.9% registered for Bb-17 and 81.9% for Bb-26. The lowest percentage of sporulation was observed for Bb-14 at 62%.

Document Type: Research Article

Publication date: December 1, 1997

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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