[Objective]The optimum extraction technology of antifungal ingredients from eight medicinal plants such as coptis root and clove,etc.and their antifungal effect on two species of plant pathogens were studied.[Method]The effective ingredients of medicinal plants were extracted by water,ethanol and acetone.The minimum inhibitory concentration(MIC) and antifungal rate of extracts from medicinal plants were determined using plate diluting method.[Results]The optimum medicinal plant and the extraction method inh...