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Virulence of several isolates of the entomopathogenic fungi  Beauveria bassiana  (Bals.) Vuill.,  Metarhizium anisopliae  (Metsch.) Sor. and  Paecilomyces fumosoroseus  (Wize) Brown &amp; Smith were evaluated on adult weevils of  Anthonomus fulvipes  Boheman at dose of 10 8  spores/mL under laboratory conditions. The study was complemented by testing one isolate each of  M. anisopliae  and  P. fumosoroseus  against adult weevils on organically grown Barbados cherry trees at dose of 2 × 10 15  spores/ha. All fungi species showed high virulence against  A. fulvipes  adults, with mortality ranging from 92% to 100%. LT 50  values varied 2.7 to 4.8 d. The  M. anisopliae  isolate 10, and the  P. fumosoroseus  isolate 1 were selected for field evaluation because laboratory insect cadavers presented the best sporulation. After applying the fungi to the trees, total weevil captures were 38, 56, and 100 for the  P. fumosoroseus, M. anisopliae,  and the check (untreated) plots, respectively. Statistical differences in fruit damage were detected among treatments:  M. anisopliae  and  P. fumosoroseus  treatments showed an average of 50% of undamaged fruits, whereas in the control plots presented 36% of undamaged fruits. Laboratory and field experiments suggest that entomopathogenic fungi have a potential as microbial control agents against the weevil  A. fulvipes  in organically grown Barbados cherry trees.

hortscience

008 Virulence of Entomopathogenic Fungi (Hyphomycetes) against Anthonomus fulvipes (Coleoptera:Curculionidae) in Organically Grown Barbados Cherry Trees: Laboratory and Field Trials