Suppressive effect of microbial suspension prepared from compost-amended soil on bacterial wilt disease of tomato in a hydroponic system.

We investigated the effect of a microbial suspension prepared from compost-amended soil on the development of bacterial wilt disease of tomato caused by Ralstonia solanacearum in a hydroponic system under greenhouse conditions. When the compost-amended soil suspension was applied to the root zone of tomato seedlings and to the nutrient solution before and after transplanting, respectively, the disease was slightly suppressed. The effect was enhanced by using a bacterial group, which was incubated in bouillon medium after collection from a compostamended soil suspension before application. The population of R. solanacearum in the nutrient solution treated