Antifungal Activity Study of Flower Chloroform Extract of Inula britannica L.

In order to understand its fungicidal properties,flower chloroform extract of Inula britannica were bioassayed in vitro against thirteen economically important plant pathogenic fungi.The results showed that chloroform extract exhibited strong fungicidal activities to mycelium growth of Gaeumannomyces gramims var.tritici,Colletotrichum orbiculare,Colletotrichum gloeosporioides and Botrytis cintrea at the concentration of 1.0g/L and the inhibition rate against G.gramims var.tritici was as high as 100%.The chloroform extract at 1.0g/L could strongly inhibit spore germination of Alternaria alternate,Colletotrichum orbiculare,Phytophthora capsici and inhibition rate was 63.33%,92.90% and 82.92%,respectively.The therapeutic and protective efficacies of chloroform extract against B.cinerea on cucumber treated at the concentration of 10.0g/L were 54.27% and 76.68%(48h),respenctively.The protective efficacy showed no obvious different with the control fungicide-pyrimethanie at 0.4g/L.