Studies on cultural variability and management of bottlegourd anthracnose caused by Colletotrichum lagenarium (Pass.) Ellis and halsted
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Date
2017
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CCSHAU
Abstract
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.
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