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The joint action between Beauveria bassiana (Balsamo) Vuillemin and synthetic pyrethroids was tested against third instar larvae of Helicoverpa armigera (Hubner) on different hosts. Combined application of B. bassiana + pyrethroids at LC₂₅ + LC₂₅ on different hosts proved effective as the mortality was 2.67-16.99 and 7.17-26.00 per cent more than the expected mortality at LC₅₀ of B. bassiana alone and LC₅₀ of pyrethroids alone respectively.

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Joint action of Beauveria bassiana (Balsamo) Vuillemin and synthetic pyrethroids against Helicoverpa armigera (Hubner) (Noctuidae: Lepidoptera)

Abstract