Identification of Pathogens Causing Grape Rot on 'Red Glove' Variety Imported from Chile

Korean Agricultural Culture Collection, Agricultural Microbiology Division, National Academy of Agricultural Science, Suwon 441-707, Korea(Received on July 9, 2012; Revised on September 26, 2012; Accepted on September 26, 2012)Post-harvest rot of grape causes a severe economic loss and lower of the grape quality. It is also one of theimportant limiting factors for grape export. Grape rots and their casual agents on ‘Red Globe’ varietyimported from Chile were identified. Grapes shown rotting symptom were collected from the storages nearthe import harbor. The 3 different rots were identified on the imported ‘Red Globe’; melting decay, graymold, and blue mold. A bacterium that isolated from a typical melting decay symptom was identified asGluconobacter cerinus on basis of its nucleotide sequence of 16S rDNA and fatty acid profile. By inoculationon grape, it caused cracking and dissolution of epidermis of grape which were the characteristics of meltingdecay. Botrytis cinerea and Penicillium expansum were isolated from grapes showing gray mold and bluemold. The 2 fungal isolates were identified on basis of their morphological characteristics and nucleotidesequence of their beta-tubulin genes. They showed strong pathogenicity on ‘Campbell Early’ variety that is amajor table grape in Korea.Keywords : Blue mold, Botrytis cinerea, Gluconobacter cerinus, Gray mold, Penicillium expansum