Antifungal Activity of Ethanol Extract from Platycladus orientalis

Based on growth rate methods,antifungal activities of different parts of Platycladus orientalis ethanol extract were assayed against 21 kinds of plant fungi.The results showed the inhibition rates of extract from the leaves,branchlets,cones and seeds of P.orientalis against 4 kinds of plant fungi were notable at 50 g/L (amount to the quality of drying P.orientalis).The antifungal activity of extract of P.orientalis leaves was best;the EC50 of leaves extract against Coniothyrium diplodiella,Elsinoe ampelina,Phytophthora melongenae and Penicillium expansum were 5.424,3.186,8.913 and 19.000 g/L respectively.The antifungal activities of extracts by petroleum ether,ethyl acetate and n-butanol against Valsa mali and E.ampelina was tested,the results showed that the antifungal activities of extracts by petroleum ether,ethyl acetate were both notable.At 0.5 g/L,the inhibition rates of petroleum ether extract against V.mali and E.ampelina were 80.35% and 60.23% respectively.The inhibition rates of ethyl acetate extract were 81.88% and 64.06% respectively.In one word:the ethanol extract of leaves,branchlets cones and seeds had antifungal activities and the antifungal activity of leaves extract was the best;the inhibition composition was in the petroleum ether and ethyl acetate extracts.