Obviously biocontrol effect of four actinomycetes strains on gray mold disease of tomato was obtained in greenhouse,especially strain 06-6,the efficiencies of control was 81.2%.

• 温室试验中4株放线菌对番茄灰霉病均有不同程度的防治效果；以菌株06-6表现最为明显；防效达到了81.；2%25。