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2025, Vol. 5, Issue 1, Part B

Studies on sources of infection and efficacy of bioagents against foliar fungal pathogens of cowpea


Author(s): Ketan Patil, Mina Koche, Rajkumar Kothikar and Samir Lande

Abstract: Fungal foliar diseases of cowpea include Myrothecium leaf spot (Myrothecium roridum), Anthracnose (Colletotrichum lindemuthianum and C. dematium), stem and leaf blight (Macrophomina phaseolina) and web blight (Rhizoctonia solani). The present study was undertaken to know the possible sources of disease infection and to test the efficacy of bioagents against foliar fungal pathogens of cowpea. Test fungi were isolated from infected leaves of cowpea collected from Akola, Amravati and Washim districts of Vidarbha region of Maharashtra, India. To know the possible sources of disease infection, these fungi were used for further studies by leaf, soil and seed inoculation methods. Efficacy of four bioagents, Pseudomonas fluorescens, Bacillus subtillis, Aspergillus niger and Trichoderma viride were tested against foliar fungal pathogens Macrophomina phaseolina, Myrothecium roridum and Colletotrichum dematium by dual culture technique at Department of Plant Pathology, Post Graduate Institute, Dr. Panjabrao Deshmukh, Krishi Vidyapeeth, Akola, M.S., India. Among the isolated fungi from infected leaves of cowpea, Macrophomina phaseolina, Myrothecium roridum and Colletotrichum dematium were found pathogenic to cowpea. Under leaf inoculation method, symptoms were produced on leaves after 12 to 15 days from the date of inoculation. Maximum infection (80%) was observed in Colletotrichum dematium. Seed and soil inoculation method were observed to be more or less similar in both cases. Seed rot was observed in the range of 24 to 43 per cent, pre and post-emergence damping off 17.33 to 34.21 per cent and seedling blight 14.29 to 29.07 per cent. Among the treatments of bioagents, Bacillus subtilis was found more efficient against Macrophomina phaseolina, Myrothecium roridum and Colletotrichum dematium followed by Pseudomonas fluorescens, Aspergillus niger and Trichoderma viride by dual culture technique.

Pages: 120-124 | Views: 32 | Downloads: 14

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International Journal of Plant Pathology and Microbiology
How to cite this article:
Ketan Patil, Mina Koche, Rajkumar Kothikar, Samir Lande. Studies on sources of infection and efficacy of bioagents against foliar fungal pathogens of cowpea. Int J Plant Pathol Microbiol 2025;5(1):120-124.
International Journal of Plant Pathology and Microbiology
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