A total of forty isolates of Colletotrichum capsici were isolated from diseased samples and identified based on conidial morphology, size, colour, acervuli and setae. Isolates were designated as Cc 1 to Cc 40. Pathogenic variability among the isolates of C. capsici was studied by adopting pin prick method on red ripe chilli fruits of cultivar Sindhur. Based on the PDI values, the isolates were grouped in to five groups, viz., Group I to Group V. Group I (PDI < 40) consisted of 1 isolate Cc 20 which recorded a PDI of 36.30. Group II (PDI 40-50) consisted of 2 isolates Cc 22 and Cc 35. Group III (PDI 50-60) consisted of 14 isolates (Cc 2, Cc 7, Cc 10, Cc 11, Cc 16, Cc 24, Cc 26, Cc 27, Cc 28, Cc 29, Cc 32, Cc 34, Cc 36, Cc 37). Group IV (PDI 60-70) consisted of 20 isolates (Cc 1, Cc 4, Cc 6, Cc 8, Cc 9, Cc 12, Cc 13, Cc 14, Cc 15, Cc 17, Cc 18, Cc 19, Cc 21, Cc 23, Cc 25, Cc 30, Cc 31, Cc 33, Cc 38, Cc 40). Group V (PDI >70) consisted of 3 isolates (Cc 3, Cc 5, Cc 39).

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