Madras Agricultural Journal
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Research Article | Open Access | Peer Review

Field Evaluation of Microbial Consortia Mediated Resistance against Okra Shoot and Fruit borer, Earias vittella

Volume : 99
Issue: Jan-mar
Pages: 102 - 106
Published: May 03, 2023
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Abstract


A field experiment was conducted during Kharif 2009 to evaluate the microbial consortia mediated resistance against okra shoot and fruit borer, Earias vittella (Fab.) in okra variety, Arka Anamika and hybrid, CoBhH1. The microbial consortium Pseudomonas fluorescens Pf1 + Beauveria bassiana B2 isolate (Pf1 + B2) was effective in reducing the shoot and fruit borer infestation through seed treatment, soil application and foliar spray. Pf1 + B2 recorded minimum shoot damage during vegetative and reproductive phases (3.99 and 14.33 %) as against untreated check (13.58 and 24.16 %). Fruit infestation was less in Pf1 +B2 consortia treatments on weight and number basis (4.22 and 2.83%), whereas it was 13.59 and 17.96 per cent in untreated check. Phenol content was high in Pf1+B2 consortia treated plants in Arka Anamika (0.94 mg/g) and CoBhH1 (1.39 mg/g), as against untreated check (0.20 and 0.41 mg/g, respectively). There was significant negative correlation between the shoot and fruit borer infestation and phenols (r=-0.937**), defensive enzymes viz., peroxidase (r=-0.909*), poly phenol oxidase (r=-0.993**), and phenyl alanine ammonia lyase (r=-0.960**).

DOI
Pages
102 - 106
Creative Commons
Copyright
© The Author(s), 2025. Published by Madras Agricultural Students' Union in Madras Agricultural Journal (MAJ). This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited by the user.

Keywords


Okra Earias vittella Pseudomonas fluorescens Beauveria bassiana microbial consortia.
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