Efficacy of White Muscardine Fungus Beauveria bassiana (Balsamo) Vuillemin against Fruit borer Earias vitella (Fabricius) in Okra (Abelmosculus esculentus)

Abstract

The White Muscardine fungus Beauveria bassiana  was tested against second, third and fourth instar larvae of Bhendi fruit borer Earias vitella  with conidial suspension mass multiplied in Sabouraud’s Dextrose Broth under invitro  conditions. Of which the second instar larvae showed the maximum mortality with a LC, LD and LT 50 of 2.1 x 10⁷, 4 g/lit of water and 72 h. The Bioassay of the third and fourth instar larvae of Earias vitella for their susceptibility to Beauveria bassiana showed that susceptibility decreased with increase in age of the larvae and required higher concentrations to  kill the larvae which indicated that susceptibility to culture  depends on the age of the larvae.

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¹Perunthalaivar Kamaraj Krishi Vigyan Kendra, Puducherry, Tamilnadu, India

²Retd. Senior Grade Deputy Director, Vector Control Research Centre, Puducherry, Tamilnadu, India

³Department of Microbiology, Faculty of Agriculture, Annamalai University, Annamalai Nagar, Tamilnadu, India

*Corresponding Author, Email: [email protected]

Cite This Article As: N. Manimekalai, N. Vijayakumar, K. Balaraman, M. Deiveekasundaram and A. Ramamourthi. 2010. Efficacy of White Muscardine Fungus Beauveria bassiana (Balsamo) Vuillemin against Fruit borer Earias vitella (Fabricius) in Okra (Abelmosculus esculentus). J. Ecobiotechnol. 2(2): 65-68