The antifungal activities of extract from herbs on plant pathogenic fungi and field control effect on plant diseases were tested.The result showed that Dictamnus dasycarpus had strong antifungal activities on Fusarium graminearum,Rhizotonia solani,Ustilage tritici,Botryis cinerea and Alternaria solani's mythel growth,and on Fusarium graminearum,Botryis cinerea and Alternaria solani's condium germination.The field control effect of 0.2g/mL Dictamnus dasycarpus on tomato early blight was 76.3%,on tomato gray ...