Rhizoctonia solani Kühn [teleomorph :Thanatephorus cucumeris (Frank) Donk] is the most destructive and widely distributed soil borne pathogenic fungus causing black scurf of Potato. Cultural and morphological variability was studied in eleven potato isolates of R. solani collected from different potato growing areas including Haryana, Punjab, Uttarakhand, Rajasthan and Maharashtra etc. Based on the radial colony growth rate, all the isolates were categorised into 3 groups as slow, medium and fast growing. Majority of isolates showed slow colony growth rate. | Characterization of cultural and morphological variability in rhizoctonia solani isolates associated with black scurf of potato
