Susceptibility of Ceratitis capitata Wiedemann (Diptera: Tephritidae) to Entomopathogenic Fungi and Their Extracts

By M. Castillo, P. Moya, E. Hernández, Eduardo Primo-Yúfera. 2000

176 citations recorded by the source corpus.

Abstract The effectiveness of seven strains of entomopathogenic fungi against Ceratitis capitata adults was evaluated in the laboratory. Adults were susceptible to five of seven aqueous suspensions of conidia. Metarhizium anisopliae and strain CG-260 of Paecilomyces fumosoroseus were the most pathogenic fungi, with 10-day LD 50 values of 5.1 and 6.1 × 10 3 conidia/fly, respectively, when applied topically. Sublethal effects on fecundity and fertility of the fungal-exposed females were also studied. The most effective fungus in reducing fecundity was P. fumosoroseus CECT 2705, with reductions on the order of 65% at 1 × 10 6 conidia/fly. M. anisopliae and Aspergillus ochraceus also showed significant reductions of fecundity (40–50% for most of the assayed concentrations). Fertility was moderately affected by the fungi. M. anisopliae at 1 × 10 6 conidia/fly was the most effective fungus, showing egg eclosion reduction of over 50% compared with the control. In addition, culture broth dichloromethane extracts from the entomopathogenic fungi were tested for insecticide activity against C. capitata, including effects on fecundity and fertility. The extract from M. anisopliae was the most toxic, resulting in about 90% mortality at a concentration of 25 mg/g of diet; under these conditions, fecundity and fertility of treated females were reduced by 94 and 53%, respectively, compared with untreated controls.

Subfields: Insect Science, Plant Science

View Paper: https://www.semanticscholar.org/paper/13c65a7288971a981bf087727ed25788bfcbcf2f

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Citations in the corpus

Evaluation of Beauveria bassiana and B. brongniartii strains and four wild-type fungal species against adults of Bactrocera oleae and Ceratitis capitata (2005, background): “The fungal species M. anisopliae strain CG-260, and P. fumosoroseus were reported to be pathogenic to C. capitata adults (Castillo et al., 2000).”
Effect of constant temperatures on germination, radial growth and virulence of Metarhizium anisopliae to three species of African tephritid fruit flies (2004, background): “Entomopathogenic fungi are being developed as alternatives to chemical pesticides for the control of fruit flies (García et al., 1984; Castillo et al., 2000; Lezama-Gutierrez et al., 2000; Ekesi et al., 2002).”