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Studies on cultural variability and management of bottlegourd anthracnose caused by Colletotrichum lagenarium (Pass.) Ellis and halsted
(CCSHAU, 2017) Ankit Kumar; Narender Singh
Studies on variability and management of Colletotrichum lagenarium (bottle gourd anthracnose) through fungicides and plant extracts were carried out. Survey was conducted in ten villages of five districts of Haryana and minimum per cent disease intensity on leaves was observed in Arjaheri village of Karnal district, whereas on fruits per cent disease intensity was minimum in Dadupur village of same district. In the variability studies, potato dextrose agar medium was found best for growth at 6.5 pH and 30ᵒC temperature. Among various isolates Karnal (CL2) and Kaithal (CL3) isolates were found fast growing. Among six plant extract tested, neem leaf extract (20% w/v) was found most effective in inhibiting (60.36%) mycelial growth. Seven fungicides were tested and found 100 percent inhibition of growth of fungus by Carbendazim (50% WP) and propiconazole (25% EC). Fungicides viz. carbendazim and propiconazole along with two plant leaves extracts viz., neem and garlic were evaluated. Carbendazim (50% WP) at 100 ppm concentration was found most effective in reducing anthracnose disease with, neem and garlic leaf extracts being less effective. Twenty four germplasm lines were screened and the three lines viz., K-92420, GH-3 and GH-11 were found resistant to the disease.