Use of Ozonized Water to Control Anthracnose in Papaya (Carica papaya L.) and its Effect on the Quality of the Fruits

• Published in: Ozone: science & engineering Vol. 43; no. 4; pp. 384 - 393
• Main Authors: da Costa, André Rodrigues, Faroni, Lêda Rita D'Antonino, Salomão, Luiz Carlos Chamhum, Cecon, Paulo Roberto, de Alencar, Ernandes Rodrigues
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 04-07-2021; Taylor & Francis Ltd
• Subjects: Accounting; Anthracnose; Antiinfectives and antibacterials; Antimicrobial agents; Carbon dioxide; Colletotrichum sp; Coloration; Economic impact; Firmness; Fruits; Fungal diseases; fungi control; Oxidation; Ozone; Ozonized water; papaya; Papayas; post-harvest quality; Spoilage; Weight loss
• ISSN: 0191-9512; 1547-6545
• DOI: 10.1080/01919512.2020.1816450

Post-harvest fungal diseases, such as anthracnose, are common causes of spoilage in papaya fruits, accounting for considerable economic losses. The use of ozone gas is an alternative to tackle this problem, as it is a strong oxidizing and antimicrobial agent. Thus, the objective of the present work was to evaluate the efficiency of ozonized water for controlling anthracnose in papayas. It also aimed at assessing the influence of this treatment in CO
2
production, weight loss, and fruit coloration. Papayas inoculated with Colletotrichum gloeosporioides and C. magna were exposed to ozone dissolved in water at the concentration of 0.8 mg L
−1
for 40, 80, 120, and 160 min. At the temperature of 11 °C, the longest exposure times implied in a decline of CO
2
production and a reduction of fruit firmness. The storage at 25 °C resulted in a lower percentage of injured areas, less CO
2
production, and less effect on firmness, in comparison with the untreated fruits. The application of ozone dissolved in water at 0.8 mg L
−1
for up to 160 min is a feasible alternative for controlling the severity of anthracnose in post-harvested papaya of the variety Golden, without negatively affecting the quality of the fruits.