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http://dx.doi.org/10.5423/RPD.2014.20.2.101

Suppression of Citrus Canker by Pretreatment with Rhizobacterial Strains Showing Antibacterial Activity  

Yang, Ji Seun (Faculty of Bioscience and Industry, Jeju National University)
Kang, So Young (Faculty of Bioscience and Industry, Jeju National University)
Jeun, Yong Chull (Faculty of Bioscience and Industry, Jeju National University)
Publication Information
Research in Plant Disease / v.20, no.2, 2014 , pp. 101-106 More about this Journal
Abstract
Citrus canker caused by Xanthomonas citri subsp. citri (Xcc) is one of the most important diseases on citrus. Although Satsuma mandarin cultivating mostly in Korea is moderately resistance to canker, occurrence of the disease were more frequently reported since last decade. Like other diseases in citrus, citrus canker was mainly protected by chemical fungicide in the field. Due to the side effect of the chemicals, alternative method of disease control is recently required. In this study four rhizobacterial strains TRH423-3, MRL408-3, THJ609-3 and TRH415-2 are selected by testing its antifungal activity against Xcc. Pre-inoculation with the selected rhizobacterial strains caused disease suppression on the citrus leaves after inoculation with the citrus canker pathogen. Similarly, in the field test symptoms of citrus canker were less developed in the citrus trees applied several times with the selected rhizobacterial strains compared with those of untreated trees. Therefore, it is suggested that the selected rhizobacterial strains may be valuable as an alternative method in the environment-friendly citrus farm.
Keywords
Antibiotics; Bacterial disease; Biological control; Jeju Island;
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