As one of biopesticides,microbial fungicides play a profound role in controlling plant diseases.This paper summarized the research progress of the application of Antagonistic bacteria,Antagonistic fungus and Antagonistic actinomycetes to microbial fungicides,emphasized the resistant mechanism,the application and the problems in the progress of research,in the last,put the propects of microbial germicides forward.

Actinomycetes are one of the most important bio - control micro - organisms which produce antibiotics and enzymes and are advantageous in the bio - control of plant diseases. This study addresses the bio - control of actinomycetes against plant diseases in terms of actinomycetes＇ action on phytopathogen and on the plants＇ disease resistance under the soil environ- ment. The paper also gives a brief introduction to the applications of actinomycetes in the bio - control of plant diseases, research hotspot and development trend.