Vol. 12, Issue 4 (2023)

Author(s):
Shubham Singh, Ramesh Singh, Neha Gupta, Saurabh Yadav and Yogesh Kumar

Abstract:
The experiment was conducted to observe the effect of different media on the radial growth of Alternaria ricini causing leaf spot in castor. The present investigation was conducted in the laboratory of department of plant pathology T.D.P.G., College, Jaunpur. In year 2022-23 the most effective culture media over which maximum growth in (cm.) and sporulation was recorded on Potato Dextrose Agar Media (8.00) followed by Maltose Extarct Media (6.70), Corn Meal Media (6.50), Wheat Extract Media (5.50), Oat Meal Agar Media (5.00), Standard Nutrient Agar Media (4.70), Kirchaff’s Media (3.50) and minimum were found in Leaf Extract Media (3.00). An experiment was conducted to evaluate the hydrogen-ion concentration on vegetative and reproductive growth of the fungus Seven pH level viz., 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, and 8.0 were used in the present studies, the maximum weight of dry mycelium was found on pH 7.0 (720.00 mg) and the minimum was found on 8.0 (150.20 mg).