Abstract

SOUZA, Angela Vacaro de; KOHATSU, Douglas Seijum; LIMA, Giuseppina Pace Pereira  and  VIEITES, Rogério Lopes. Post-harvest peach maintenance by using cold storage and irradiation. Rev. Bras. Frutic. [online]. 2009, vol.31, n.4, pp. 1184-1189. ISSN 0100-2945.  http://dx.doi.org/10.1590/S0100-29452009000400036.

It was evaluated the treatments with uV light (254nm, UV-C) regarding the maintenance of peach fruits cv. Douradão at 5, 10, 15 and 20 days kept under low temperature conditions (0ºc e 75-85% de Rh). the treatments were: control (0 minute of exposure - 0 kj. m ^-2); T1 ( 5 minutes -1,85 kj. m ^-2); T2 ( 10 minutes - 3,71 kj. m ^-2); ( 15 minutes - 5,55 kj. m ^-2) e T4 ( 20 minutes - 7,52 kj. m ^-2. the experiment was a complete randomized design with three replications of two peaches per plot. the evaluated variables were: soluble solids (SS); titrable acidity (TA); relation SS/TA "Ratio"; pH; pulp firmness, respiration and shelf life. the peaches did not change the values of pH and the tA during all the storage. the best values of SS and pulp firmness were presented for the treatment T4. The respiration.rate was lower in T4. Changes of SS, and pulp firmness showed for the fruits of the treatment T4 were smaller than in the others treatments, thus showing the efficacy of the irradiation use.

Keywords : Prunus persica; UV-C; low temperature.