Abstract
【Although several adverse effects have been increased in recent years, synthetic agro-chemicals have been widely used to control diseases on paprika. This research was conducted to isolate and to characterize the antagonistic microorganism to control major paprika diseases, gray mold rot, fruit and stem rot, phytophthora blight, sclerotium rot, and wilt disease. Analysis of the fatty acid and analysis of the 16S rDNA gene sequence revealed that isolated in this research belongs to a group of Burkholderia cepacia. Specially, 16S rDNA gene sequence of showed 99% of sequence similarity with cepacia. Observation through the optical microscope revealed that was effective on suppression of the spore germination and the hyphal growth of pathogens. treatment on pathogens induced marked morphological changes like hyphal swelling and degradation of cell wall. In the case of phytophthora blight, the zoosporangium formation was restrained. On the basis of the results of this study, we propose that an antagonistic microorganism, cepacia, found in this study naming as B. cepacia strain YKJ2 and has great potential as one of biological control agents against major diseases of paprika.】
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