Hydrothermal treatment with chitosan coating for the control of antracnosis (colletotrichum gloeosporioides) in postharvest papaya

Investigation article

Abstract

The purpose of this investigation was to determine the influence of the application of hydrothermal treatment using the temperatures 30, 40 and 45 °C, immersion times 20, 30 and 40 minutes and concentration of chitosan 0,1, 0,2 and 0,3 % for the control of Antracnosis (Colletotrichum gloeosporioides) plus an absolute control that did not have the influence of the actors under study, on the parameters physiological weight loss (PFP), pH, ° Brix, acidity, firmness and deterioration index (ID). The results show that the temperature influenced the PFP on days 5, 9 and 10, while the immersion times influenced on days 5 and 12, the influence of the chitosan at 0.1% was expressed on days 5, 10 and 12 for this same variable. For firmness the treatment with 35 ° C showed a better behavior. In spite of the presence of Colletotrichum gloeosporioides, the ID corresponded to a moderate damage, however, for the variables pH, °Brix and acidity no significant statistical differences were reported.
Keywords: papaya, postharvest, temperature, covering, Colletotrichum gloeosporioides