Indexing

Morphological and Cultural Variability of C. gleosporioides Causing Leaf and Fruit Spot of Pomegranate

Author: Sanhita Malvi, K.S. Raghuwanshi, Sanjay Kharte, Pratik Pali and Priyanka Shinde

PDF Download PDF

Abstract

In India anthracnose, caused by C. gloeosporioides is the second most important disease of pomegranate next to bacterial blight commonly referred as oily spot. Recently, the pathogen showed high variability and development of fungicide-resistant strains. Therefore, present study was undertaken to study the morphological and cultural variability. All the isolates were identified as C. gloeosporioides on the basis of their morphology. The pathogen exhibited high level of variability and all the 16 isolates were found to be pathogenic and produced diseased symptoms within one week of inoculation. The mean colony diameter of all the isolates ranged from 85.33 mm to 89.67 mm. The colony colour of the isolates varied from grey, white and black. The reverse colony showed black and white colony colour. Sporulation was categorized as heavy to low with and spore size ranged from 9.146µm to 13.67µm. The isolates differed in their ability to produce symptoms. On the basis of their virulence, the isolates PCg 7, 8 and 14 were found to be very aggressive while PCg 5, 6 and 13 were moderately aggressive and the rest of the isolates were less aggressive.

Keywords

Anthracnose, C. gloeosporioides, PCg, morphologival and cultural variability

Conclusion

Colletotrichum gleosporioides exhibits a wide range of morphological variability within the isolates. Therefore, there was a need to study these parameters, so as to ease the classification, identification and management of the pathogen. Despite of isolates being of same species, the isolates show remarkable differences with respect to colonial morphology (grey to white), sporulation (heavy to low), spore size (ranging from 9.146 µm to 13.798 µm) and aggressiveness. The variability within the same species may be due to environmental conditions prevailing in the location of the isolate from where it is collected.

References

-

How to cite this article

Sanhita Malvi, K.S. Raghuwanshi, Sanjay Kharte, Pratik Pali and Priyanka Shinde (2023). Morphological and Cultural Variability of C. gleosporioides Causing Leaf and Fruit Spot of Pomegranate. Biological Forum – An International Journal, 15(2): 1205-1211.