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00925njm 22002777a 4500 dc Teixidó, Neus author Viñas, I. author Usall, Josep author Magan, N. author 1998-05-29 Unmodified and low water activity (aw)-tolerant cells of Candida sake CPA-1 applied before harvest were compared for ability to control blue mold of apples (‘Golden Delicious’) caused by Penicillium expansum under commercial storage conditions. The population dynamics of strain CPA-1 on apples were studied in the orchard and during storage following application of 3 × 106 CFU/ml of each treatment 2 days prior to harvest. In the field, the population size of the unmodified treatment remained relatively unchanged, while the population size of the low-aw–modified CPA-1 cells increased. During cold storage, the populations in both treatments increased from 103 to 105 CFU/g of apple after 30 days, and then declined to about 2.5 × 104 CFU/g of apple. In laboratory studies, the low-aw– tolerant cells provided significantly better disease control as compared with the unmodified cells and reduced the number of infected wounds and lesion size by 75 and 90%, respectively, as compared with the nontreated controls. After 4 months in cold storage, both unmodified and low-a w–tolerant cells of C. sake were equally effective against P. expansum on apple (>50% reduction in size of infected wounds) Teixidó, N., I. Viñas, J. Usall, and N. Magan. 1998. “Control of Blue Mold of Apples by Preharvest Application of Candida Sake Grown in Media with Different Water Activity.” Phytopathology 88 (9): 960-964. doi: 10.1094/phyto.1998.88.9.960 0031-949X http://hdl.handle.net/20.500.12327/4563 https://doi.org/10.1094/PHYTO.1998.88.9.960 Control of Blue Mold of Apples by Preharvest Application of Candida sake Grown in Media with Different Water Activity