Abstract This research is aimed at sorting and selection of bacteria that are able to inhibit fungal leaf spot disease. Identification Laboratory of Bacterial all 51 isolates of the bacteria that have been tested for their ability to inhibit the growth of fungi that cause plant diseases by using a Dual culture bacteria to fungi that cause leaf spot disease. . Just three strains including KS193, KS196 and KS229. The bacterium has been identified molecular genetics. By comparing the sequences of 16s rRNA gene database GenBank, which found that the KS193 and KS229 is Bacillus subtillis hostile and antagonistic Bacillus cereus KS196 is effective in inhibiting leaf spot, a potted plant, it is Bacillus subtillis.
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