STUDIES ON CULTURAL AND MORPHOLOGICAL CHARACTERISTICS OF USTILAGINOIDEA VIRENS (COOKE) IN HILLY AND COASTAL ZONES OF KARNATAKA

M. BANASODE¹, G.N. HOSAGOUDAR²*
¹Department of Plant Pathology, College of Agriculture, University of Agricultural and Horticultural Sciences, Shivamogga, 577204, Karnataka, India
²Junior Rice Pathologist, AICRIP on Rice, Agricultural and Horticultural Research Station, Ponnampet, Kodagu, 571216, Karnataka, India
* Corresponding Author : gnhosagoudar@rediffmail.com

Received : 02-04-2020     Accepted : 17-04-2020     Published : 30-04-2020
Volume : 12     Issue : 8       Pages : 9715 - 9718
Int J Agr Sci 12.8 (2020):9715-9718

Keywords : Cultural, Morphological, Medium and pathogen
Academic Editor : Dmello Basil Rudolph, Gowher Gull Sheikh, Prema M. Shanmuga
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to AICRIP on Rice, Agricultural and Horticultural Research Station, Ponnampet, Kodagu, 571216, Karnataka, India. Authors are also thankful to Department of Plant Pathology, College of Agriculture, University of Agricultural and Horticultural Sciences, Shivamogga, 577204, Karnataka, India
Author Contribution : All authors equally contributed

In the laboratory, in order to culture the fungi, essential elements and compounds are needed for growth and other metabolic processes. Those elements are supplied in the medium; sometimes all media are not equally good for all fungi or an artificial medium on which all fungi can grow. Hence different media were tested in the present investigation, to select the best medium suitable for the growth of the pathogen. Among eight different semisolid media, potato sucrose agar (PSA) medium showed the maximum colony diameter with a mean of 76.25 mm, followed by oat meal agar (OMA) medium which recorded a mean growth of 70.49 mm, while YPPDA medium showed colony diameter of 68.50 mm, followed by CMA medium (65.38 mm). CDA showed very poor colony growth (20.27 mm). Mycelium colour of the fungus varied from bright white, white to cream white. The growth pattern varies from flat to raised. With respect to morphological characters it was observed that whitish coloured colony produced in the PDA, RA, CDA and RYDA, whereas the YPPDA, CMA and OMA produced the Cream white and Bright Whitish in PSA. Fungus showed the good growth on the YPPDA, PSA, CMA and OMA, however in the medium like PDA and RYDA moderate growth and poor growth was observed in the RA and CDA media. Raised mycelium growth was observed in the YPPDA, RYDA and PSA media whereas PDA, RA, CDA, CMA and OMA which produced flat mycelium growth with circular margin whereas on PSA colony shape was irregular.

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