The susceptibility of Thai and Australian mango cultivars to sap injury and possible means of control.
O'Hare, T. J.;
Development of postharvest handling technology for tropical tree fruits: a workshop held in Bangkok, Thailand, 16-18 July 1992. Year: 1994 Pages: 21-24 Ref: 3 ref.
1994
บทคัดย่อ
ABSTRACT
Thai mango cultivars (Nam Dok Mai, Nang Klang Wun, Tong Dum and Kaew Sawoey) were less susceptible to sap injury [sapburn] than Kensington (an Australian cultivar). The degree of sap injury was affected by several factors including total sap flow, sap oil content and lenticel distribution. Sap flow of Thai cultivars was considerably lower (0.17-0.47 ml/fruit) than that of Kensington (1.67 ml/fruit). The proportion of oil in the initial sap fraction collected from Thai cultivars (2.2-15.8% oil) was also substantially lower than in Kensington (52% oil). Damage occurred where sap flowed over lenticels and consequently fruits with higher lenticel densities were more prone to injury. Destemming fruits in a 1% Cold Power (detergent) solution reduced sap injury, but was not as effective as 1% calcium hydroxide solution. Cold Power appeared to increase fruit wettability, allowing penetration of sap into cuticle cracks, creating a finer, more evenly spread injury. Dipping fruits in Cold Power immediately
prior to destemming them in air was partially effective in reducing sap injury and may have acted as a physical barrier to sap entry.