Combination of Edible Coating Green Grass Jelly and Cinnamon Essential Oil Increase the Shelf Life of Water Rose Apple Fruit

Abstract The research aimed to determine the best concentration from combination of edible coating green grass jelly powder and cinnamon essential oil to extend the shelf life of water rose apple var. Merah Delima. The experiment was conducted in Postharvest Laboratory, University of Muhammadiyah Yogyakarta from December 2019 to January 2020. This research was conducted with a single factor trial design arranged in a Completely Randomized Design (CDR) with 3 replications. The experiment consisted of treatment without coating, 0,2 % powder of grass leaves + 0,4% cinnamon, 0,2 % powder of grass leaves + 0,6% cinnamon, 0,4 % powder of grass leaves + 0,4% cinnamon, and 0,4 % powder of grass leaves + 0,6% cinnamon. The results showed that the treatment of 0,2 % powder of grass leaves + 0,6% cinnamon essential oil was the most effective to extend shelf life and inhibit microbial growth in the fruit.