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Prabawati A , Susilowati A, Sugiyarto. Biological control of plant diseases involves the use of organisms other than.Abstra ct. For example, treat seed and planting mix with biocontrol agents to facilitate root colonization.Eradicants are designed to kill a pathogen that may be present in the soil. Biocontrol agents should be in place to colonize the plant surface before encountering harmful microbes. P roactively apply biocontrol agents at the very early stage of disease as opposed to when the disease has already set in.

The aims of this research were to isolate, to select, to identify and to know the relationship of phyllosphere bacteria against Xoo. Living organism, such as microorganism, take a role as a biocontrol agent. Biocontrol is one of alternative plant disease management. Rice production is often threatened by bacterial blight disease caused by Xanthomonas oryzae pv. Pros Sem Nas Masy Biodiv Indon 5: 256-262. Oryzae (Xoo) causes bacterial blight disease.