Total soluble solids of the fruit was determined by ‘ERMA’ hand
refractometer and expressed as oBrix. Total sugars were estimated
by the method of Hedge and Horreiter (1962) and expressed in
percentage. Acidity was estimated as per the AOAC, 1960 and
expressed as percentage of citric acid equivalents. Total phenol
was estimated by the method suggested by Malik and Singh
(1980) and expressed as g g−1. Peroxidase activity was assayed
spectrophotometrically (Malik and Singh, 1980) and expressed as
min g−1. Polyphenol oxidase activity was assayed using the method
described by Esterbaner et al. (1977) and expressed as min g−1.
Disease intensity score was recorded at 30 days intervals from
transplanting till harvest as suggested by Dhanam (2006).