Bioefficacy of entomopathogenic fungi against Fruit fly, Bactrocera dorsalis (Hendel) infesting Pear in Uttarakhand

The highest concentration of Beauveria bassiana (7.6x 10⁸ conidia ml⁻¹) and Metarhizium anisopliae (2.3x 10⁸ conidia ml⁻¹) showed 20.0 and 26.7% mortality of maggots of Bactrocera dorsalis, respectively after ten days of treatment in laboratory condition. However, maximum % reduction in adult emergence of fruit fly was obtained in chlorpyriphos 20EC followed by the highest concentration of M. anisopliae @ 2 x 10¹⁰ conidia ml⁻¹ after 15 days of spraying in Pear orchard.