Vol. 12, Issue 2 (2024)
Studies on sources of disease infection of foliar fungal pathogens of cowpea
Author(s): KH Patil, Mina Koche, SS Lande and RB Kothikar
Abstract: Foliar diseases of cowpea includes Myrothecium leaf spot (Myrothecium roridum), Anthracnose (Colletotrichum lindemuthianum and C. dematium), stem and leaf blight (Macrophomina phaseolina) and web blight (Rhizoctonia solani). Macrophomina phaseolina, Colletotrichum dematium and Dreschlera tetramera were isolated from infected leaves of cowpea collected from Akola, Amravati and Washim districts of Vidarbha region of Maharashtra. Among these fungi, Macrophomina phaseolina, Myrothecium roridum and Colletotrichum dematium were found pathogenic to cowpea. To know the possible sources of diseases infection, these fungi were used for further studies by leaf, soil and seed inoculation methods. 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 21.07 per cent. Hence, it is concluded that, seed and soil borne inoculum of these fungi are responsible for causing the diseases in cowpea. All the three foliar pathogens of cowpea were found transmissible from seed to plant showing the symptoms on cotyledons and true leaves. Blackgram, green gram and pigeonpea were infected by all the fungal pathogens whereas, Colletotrichum dematium could infect all leguminous hosts with varied range of intensity (1.19 to 4.32%). However, Macrophomina phaseolina was found non-pathogenic to lentil, pea, lathyrus and chickpea while, Myrothecium roridum was found non-pathogenic to pea and chickpea.
Pages: 12-15 | 81 Views 41 Downloads
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How to cite this article:
KH Patil, Mina Koche, SS Lande, RB Kothikar. Studies on sources of disease infection of foliar fungal pathogens of cowpea. Int J Chem Stud 2024;12(2):12-15.
