This study investigated the effect
of chitosan treatment on the quality of rose apples cv. Tabtim Chan stored at an ambient temperature of 30 ºC. The results
demonstrated that at day 5 of storage, the fruit coated with 2 % chitosan had a weight loss of 12.82 % and a disease
incidence of 14 % which were significantly less than those of the control (22.12 %, 24 % respectively). Fruit firmness of
the rose apples treated with 2 % chitosan was significantly higher than that of the control (5.92 kg/cm2 and 4.12 kg/cm2
respectively). In conclusion, treating the rose apples with 2 % chitosan reduces weight loss, disease incidence and
maintains the fruit firmness of rose apples cv. Tabtim Chan compared with those which were untreated.