The study was conducted during the spring 2017 and 2018 at the Horticulture Research Institute(A,R,C)
in Giza, Egypt . Tomato fruits (Lycopersicum esculentum L.) obtained from a local field in Nawag village, Tanta city,
Al-Gharbia Governorate, tomato were harvest at the Breaker-turning fruits stage, were chosen to the influence of 1-
methylcyclopropene (1-MCP) concentration on retarding ripening process of green tomato fruit and maintained
quality, tomato fruit were fully immersed in aqueous 1-MCP at 50, 100, and 150μgL-1for 10 min, then fruit quickly
dried, and then kept in 20 ◦C. Results indicated that 1-mcp treatment were retained quality fruit firmness of tomatoes
fruit in comparison to control especially high concentration