_____________________________________________________________________________________________________ *Corresponding author: Email: urmidevi42@gmail.com; Asian Food Science Journal 7(3): 1-8, 2019; Article no.AFSJ.47281 ISSN: 2581-7752 Evaluation of the Effect of Ethephon in Postharvest Tomato (Lycopersicon esculentum) Urmi Rani Devi 1* , Ayesha Begum 1 and Nilufa Yeasmin 1 1 Department of Applied Food Science and Nutrition, Faculty of Food Science and Technology, Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong -4225, Bangladesh. Authors’ contributions This work was carried out in collaboration among the authors. All authors read and approved the final manuscript. Article Information DOI: 10.9734/AFSJ/2019/v7i329971 Editor(s): (1) Manvesh Kumar Sihag, Assistant Professor, Department of Dairy Chemistry, Mansinhbhai Institute of Dairy and Food Technology (MIDFT), Gujarat, India. Reviewers: (1) Paul Kweku Tandoh, KNUST-Kumasi, Ghana. (2) Roshan Keshari, Delhi Pharmaceutical Sciences and Research University, New Delhi. (3) Larissa De Sousa Sátiro, State University of Paraíba (UEPB), Brazil. Complete Peer review History: http://www.sdiarticle3.com/review-history/47281 Received 18 October 2018 Accepted 14 February 2019 Published 04 March 2019 ABSTRACT Aims: The aim of this study is to determine the effect of applying ethephon on postharvest tomato. Study Design: Completely Randomized Design (CRD). Place and Duration of Study: The study was conducted in the laboratory of the Department of Applied Food Science and Nutrition, Department of Food Processing and Engineering, Department of Applied Chemistry and Chemical Technology of Chittagong Veterinary and Animal Sciences University, Chittagong, Bangladesh. It was conducted for a period of six months from 1st January, 2018 to 30th June, 2018. Methodology: TSS (Total Soluble Solid) was determined by using hand refractometer, proximate composition by standard AOAC method, vitamin C and β-carotene by UV-spectrophotometric method, sodium and potassium by flame photometric method, titratable acidity, calcium and magnesium by titremetric method. To compare differences in control and treated group, significant difference was considered at the level of P<0.05. Results: Ethephon treated tomatoes ripen quickly with attractive surface color and had shorter shelf life than non-treated tomatoes (control). Physico-chemical properties including total soluble solid and titratable acidity increased significantly (P<0.05) in treated group (4.66±0.57°B; 0.32±0.01% respectively) than control (3.33±0.57°B; 0.28±0.01% respectively). Moisture content Original Research Article