Development of Benzimidazole and Dithiocarbamate Resistance in Colletotrichum capsici Causing Fruit Rot of Chilli

Continuous use of benomyl, carbendazim and thiram has led to development of resistance to these fungicides in Colletotrichum capsici. In the present study, among 25 isolates of pathogen, 52% population was highly resistant to benomyl (MIC 170.8 1172.0μg/ml), carbendazim (MIC 3460.8 to 23620.4μg/ml) and thiram (MIC 568.0 to 4017.0μg/ml). Therewas also development of cross resistance amongst the three fungicides.Thirteen isolates, Cc-4, Cc-6, Cc-7, Cc-8, Cc-11, Cc-12, Cc-13, Cc-15, Cc-18, Cc-19, Cc-22, Cc-24 and Cc-25 were found to be cross resistant, while Cc-7 and Cc-8 showed high resistance to all three fungicides.