Summary: The objectives of this project were: 1. Test the new sprayable MCP formulation for efficacy on ‘Scarletspur Delicious’ and ‘Cameo’ apple fruit quality retention after storage. 2. Compare preharvest MCP treatments of the new formulation with the standard postharvest treatment approach and with AVG applied four weeks before first harvest. 3. Test preharvest MCP timing and concentration effects in relation to harvest date to identify relationships among MCP timing, concentrations and harvest date on fruit postharvest behavior. 4. Evaluate potential for AVG, ethephon, preharvest MCP or postharvest MCP as tools for adjusting fruit maturity in ‘Cripps Pink’ apples to permit earlier harvest with fruit quality and postharvest durability equivalent to untreated apples harvested at the normal time
