Abstract: Both organic and conventional red globe grape were sampled from Jinshan vineyard in Yili. The effect of different farming models of conventional and organic farming models on the epiphyte distribution was studied preliminarily in current paper by comparing the epiphytic biodiversity in grape organs. The agar-plate culture method was used for the microbial isolation, and the most-probable-number (MPN) was used for the enumeration of epiphyte population. The result was as follows: the largest number of epiphytes located on the root (up to 105 CFU/mm2), and the stem took second place, and the smallest on fruit (about 102 CFU/mm2). Besides, the amount of epiphytic fungi species of the organic grape was slightly higher than that of conventional grape; on the contrary, the amount of epiphytic bacteria species of the organic grape was lower. The number of epiphytic microorganisms of organic grape was more than that of conventional grape on all organs except leaf. The organic farming was shown to be more effective to keep the biodiversity of microbial communities in ecological environment.

Key words: red globe grape, organic food, epiphyte, food safety