Multivariate analysis of superficial scald susceptibility on Granny Smith apples dipped with different postharvest treatments

Multivariate methods were used to present the results of different postharv est treatments applied to control. superficial scald disorder in Granny Smi th apples. In a two-season study, the treatments applied by dips were diphe nylamine (DPA), Semperfresh (a sucrose ester coating) formulated alone or w ith either ascorbyl palmitate or n-propyl gallate, and CaCl2. DPA correlate d negatively with scald, whereas the rest of the treatments showed no clear relationship with the disorder. By means of partial least squares, the inc idence of superficial scald after cold storage was shown to correlate with quality parameters (firmness and acidity), measured at the end of storage. In contrast, ethylene production did not appear as a relevant factor in the incidence of scald.