Compatibility of Beauveria bassiana with insecticides and azadirachtin against Spodoptera litura

A white muscardine fungus Beauveria bassiana is an important biocontrol agent of many pests. Studies on bioefficacy of B. bassiana @ 1x10⁷ conidia/ml alone and in combination with recommended doses of insecticides viz., quinalphos, cypermethrin, lambda cyhalothrin, spinosad, indoxacarb, emamectin benzoate and azadirachtin against S. litura larvae by leaf dip method was carried out under laboratory conditions. The treatment of B. bassiana in combination with recommended doses of lambda cyhalothrin 5EC, cypermethrin 25EC and emamectin benzoate 5SG resulted in highest cumulative mortality effect against the pest.