Abstracts of 4th International Molecular Biology and Biotechnology Congress & Conference on Life Sciences Research – 2015

摘要

Chili anthracnose damages chili fruits extensively at pre- and postharvest stages causing anthracnose lesions. Evenvery small lesion of anthracnose on fruits of chili reduces the market value of chili crop. Fungitoxic effects ofmethanolic plant extracts were tested in vitrothrough poisoned food technique. There was a significant decrease inmycellial growth of the fungus with an increase in methanolic plant extracts concentration in all the tested methanolicplant extracts over the control. The fungitoxicity of methanolic plant extracts varied greatly among each other andtheir concentrations. In general, there was a decrease in mycelial growth Colletotrichum capsici with an increase inconcentration of methanolic plant extracts. However, when growth of the fungus in response to various methanolicplant extract concentrations after an incubation period of nine days at 28 ± 2°C was compared, neem leaf extractproved to be the best as it had given the maximum control (64 percent) followed by datura leaf extract (63 percent)on 1000 μg/ml concentration. While eucalyptus leaf extract was proved to be the least effective (45 percent) athighest concentration (1000 μg/ml). None of the tested methanolic plant extracts has completely checked themycelial growth of Colletotrichum capsici at any of their concentrations. Although there was an overall trend ofreduction in mycelial growth of Colletotrichum capsiciwith increase in the concentration of methanollic plantextracts.These plant extracts can be used to controlanthracnose of chilies to reduce the use of fungicides, as plantextracts are safer than synthetic fungicides.