The application of synthetic chemicai agents to control plant disease is the most effective method However,there is an urgent need for a more effective and safer measure to control plant pathogens.The actinomycetes,particularly Streptomyces species,are well-known saprophytic bacteria and important in the rhizosphere.They may influence plant growth and protect plant roots against invasion by root pathogenic fungi [1].The use of antagonistic actinomycetes or their secondary metabolites is considered to be a disease control technology.In this research,two hundred and ten actinomycetes were isolated from rhizospheric.soil of rice plant and trees.These isolates were assigned to 7 artificial multi-membered colour groups based on their colours of aerial spore mass.