International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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Original Research Articles                      Volume : 7, Issue:7, July, 2018

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : /
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(7): 2438-2445

Characterization of Cultural and Morphological Variability in Rhizoctonia solani Isolates Associated with Black Scurf of Potato
N.P. Gurav1*, Surjeet Singh1, K. Basavaraj1, Naresh Mehta1 and A.J. Madane2
1Department of Plant Pathology, CCS Haryana Agricultural University, Hisar-125 004, India
2Department of Agronomy, Banaras Hindu University, Varanasi-221 005, India
*Corresponding author

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. Hyphal width in all the isolates ranged between 6 to 10.5 μm. Most of the isolates produced appressed or raised and pale yellow to very pale brown, mycelium with varied patterns of sclerotial formation. Majority of isolates had sclerotia that aggregated at the centre of the colony. Isolates produced brown to dark brown sclerotia which were either present in the form of concentric ring at the centre or periphery or scattered throughout the colony. Studies on cultural and morphological characterization of R. solani isolates showed that isolates were highly variable both in mycelial and sclerotial parameters, with no consistent characters related geographic origin.

Keywords: Potato, Rhizoctonia solani, Black Scurf, cultural variability, Morphological variability

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How to cite this article:

Gurav, N.P., Surjeet Singh, Basavaraj K., Naresh Mehta, and Madane, A.J. 2018. Characterization of Cultural and Morphological Variability in Rhizoctonia solani Isolates Associated with Black Scurf of Potato.Int.J.Curr.Microbiol.App.Sci. 7(7): 2438-2445. doi:
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