There is little scientific literature pertaining to using multiple 1-MCP treatments on apples that have been stored in CA storage. DeLong et al. (2004) showed that a second 1-MCP treatment had no significant effect on ‘Cortland’ and ‘McIntosh’ apples after 4.5 months of CA or ambient air storage, but the concentration of 1-MCP utilized was less than that used commercially. The objective of this study was to investigate the effects of multiple 1-MCP treatments, once 2 d after harvest and again after 4 months of CA storage, on fruit quality and the development of storage disorders in ‘McIntosh’, ‘Empire’ and ‘Northern Spy’ apples during long-term storage. ‘Northern Spy’ apples were also used to determine if a single 1-MCP treatment after 4 months of CA storage is similar to a single 1-MCP treatment prior to CA storage at 2 d postharvest. To date, there are no scientific reports of 1-MCP treatments in combination with CA storage of ‘Northern Spy’ apples.