Antifungal activities of the extracts of Inula britannica L.against Phytophthora capsici Len

The antifungal activities of petroleum ether,chloroform,ethylacetate and n-butyl alcohol root,stem,leave and flower extracts of Inula britannica in vitro and in vivo conditions were evaluated for their effectiveness against Phytophthora capsici Leonian.The results showed excluding chloroform stem extracts,mycelium growth of P.capsici was inhibited by other extracts.The radial growth of the tested fungus was inhibited 81.19%,93.15%,100% and 95.43% by flower extracts and 81.17%,88.29%,95.43% and 87.16% by leave extracts at 0.1 g·mL-1,respectively.The radial growth of the tested fungus was inhibited above 62.79% by stem and root extracts at 0.1 g·mL-1.The spores germination of P.capsici was inhibited by petroleum ether leave and flower extracts at 0.05 g·mL-1 and the inhibition rates were 83.33% and 66.67%.The results in pot experiments showed chloroform flower extracts had good therapeutic and protective effects(46.35% and 52.18%) being not significantly different from the control fungicide.