Abstract: The effects of ultravioletradiation, plastic wrap packaging, and ultravioletradiation combined with plastic wrap packaging on changes in rot rate, the levels of total soluble solids ( TSS) , vitamin C ( V_C) , malondialdehyde ( MDA) , peroxidase ( POD) and superoxide dismutase ( SOD) were investigated in the two southern blueberry cultivars i.e‘Misty'and‘O'Neal'at4 ℃ storage condition, aiming to compare the effectiveness of the three treatment methods for preserving blueberries.The results showed that, with increase of cold storage days, the rot rate of the two blueberry cultivars gradually increased, V_C gradually decreased, the levels of TSS, anthocyanin, MDA, SOD and POD trended to increase first, and decrease later.Compared with the control, the three treatments i.e ultravioletradiation, plastic wrap packaging, and ultraviolet radiation combined with plastic wrap packaging, decreased the decay incidence, and delayed the decreases of TSS, anthocyanin ( except for ‘O'Neal') , and V_C concentrations, reduced the peak values of MDA, POD and SOD.During the later storage, the activities of POD and SOD were higher in fruits treated by ultravioletradiation combined with plastic wrap packaging than by other treatments. The decay incidence was lower in‘Misty'fruits than in‘O'Neal'ones, and the storage time was longer in the former than in the later.Thus, ultravioletradiation combined with plastic wrap packaging can preferably keep the quality of the two blueberry cultivars, especially ‘Misty', during the cold storage.