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Nitika Kumari*, A.K. Meena, Vijay Shree Gahlot, Vinay Kumar Kardam and Hansraj Dhakar
Department of Plant Pathology, College of Agriculture, Swami Keshwanand Rajasthan Agricultural University, Bikaner-334006, Rajasthan, India.
Email:nitikakumari0505@gmail.com
Received-30.04.2022, Revised-15.05.2022, Accepted-27.05.2022
Abstract: The charcoal rot of cowpea (Vigna unguiculata (L.) Walp) is caused by Macrophominaphaseolina. It affects many crops worldwide causing devastatingly high yield losses. No single control measures are found to be much effective owing to its soil-borne nature. In order to manage the disease, a field experiment was conducted to determine the effectiveness of biocontrol agentsviz., Trichodermaharzianum and Pseudomonas fluorescens and fungicides viz., tebuconazole 2DS, tebuconazole 50% + trifloxystrobin 25% WG, carbendazim 12% + mancozeb 63% WP and captan 70%WP were used alone as well as in combinations. When fungicides were applied as seed treatment and soil drench together, tebuconazole 50%+ trifloxystrobin 25% WG was proved to be most effective against charcoal rot by decreasing disease incidence and increasing grain yield followed by carbendazim 12% + mancozeb 63% WP.Seed treatment and foliar spray when applied alone, were found to be effective against M. phaseolina but the results revealed that they were less effective than combination treatment of fungicides. Bio-agents minimized the incidence of disease but to a lower extent than fungicides. A relatively more disease control was observed by T. harzianum followed by P. fluorescens.
Keywords: Charcoal rot, Macrophominaphaseolina,Pseudomonas fluorescens, Soil-borne, Trichoderma harzianum
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