Evaluation of the efficacy of a commercial formulation of beauveria bassiana for the control of the invasive fruit fly bactrocera dorsalis (Diptera: Tephritidae)
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Date
2016
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Koul Research Foundation
Abstract
Evaluation of the efficacy of a commercial formulation of Beauveria bassiana (Botanigard® ES) for the control of the oriental fruit fly, Bactrocera dorsalis (Diptera: Tephritidae) was carried out on three developmental stages. Botanigard® ES containing 11.3% Beauveria bassiana GHA strain was applied to larvae, pupae and adults at concentrations of 106, 53.0, 26.5, 13.3 and 6.65 (× 106 spores/mL). The effect of B. bassiana on B. dorsalis was dose dependent, increasing with fungal spore concentration. The results showed that an optimum dose of 26.5 × 106 spores/mL killed 50% of adult flies within 4-5 days and 99% within 8-9 days. The same dose reduced adult emergence from infected pupae from 97% in the control to 46% in the treated groups. Fungal treatment at 26.5 × 106 spores/mL also killed almost all adults emerging from pupae and adults treated directly. Comparing methods of fungal application in the field, the result indicated that applying the fungus in fruit fly traps in mango canopies is a better method for fruit fly control in the field as compared to soil surface spray method. However, both methods could be used simultaneously for better results. © 2016 (KRF).
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Keywords
Bactrocera dorsalis, Beauveria bassiana, Biological control, Entompathogenic fungi;, Formulation