Visual acceptability of ‘B74’ (‘CalypsoTM’) mangoes as influenced by lenticel discolouration and decay development at various storage temperatures
E.L. Winley, F. Trujillo, A.R. East
Program and Abstract. 2007 Australasian Postharvest Conference. Crowne Plaza Terrigal, NSW, Australia. 12 September 2007. 87 p.
2007
บทคัดย่อ
Storage characteristic of mangoes vary between cultivar. 'B74' ('Calypso TM') mangoes have demonstrated a susceptibility to decay by anthracnose and a propensity to lenticel discolouration. Incidence of either causes reduced visual quality and results in unsaleable fruit. A single harvest of fruit (with no ripening treatments) was stored in a variety of constant and variable temperature treatments from 9°C to 30°C for approximately 60 days. The incidence of both lenticel discolouration and decay was monitored with independent grading scales in 100 fruit per treatment. Assuming that the maximum proportion of a population of fruit being unacceptable was 10%, and ignoring all other quality characteristics (firmness, colour, brix etc.), the results showed that 'B74' mangoes could be stored for approximately 2, 3, 3.5, 4 and 7 weeks at 30°C, 20°C, 17°C, 13°C and 9°C, respectively. Unacceptable fruit were primarily caused by decay in all constant temperature treatments, while lenticel discolouration was an important factor for fruit stored at 13°C and 9°C prior to transfer to a simulated display temperature of 20°C. As a result, storage at cool temperatures (13°C and 9°C) was observed to provide only small increases in saleable life in comparison to fruit stored constantly at 20°C.