Disease control in Philippine 'Carabao' mango with preharvest bagging and postharvest hot water treatment.
Bugante R. D. Jr., Lizada M. C. C., Ramos M. B. de
Author Affiliation: Postharvest Horticulture Training and Research Center, College of Agriculture, University of the Philippines at Los Baņos College, Laguna 4031, Philippines.
: 797-804
Abstract : Preharvest (2 months after flowering initiation) wrapping of mango cv. Carabao fruits (grown at Tanay, Rizal province, Philippines) with brown paper or newspaper was investigated. At the packing house after field sorting, bagging resulted in at least 70% of fruits being of export quality, compared with 50% of unbagged fruits. Rejection in unbagged fruits was due to insect damage (30%), scab [Elsinoë mangiferae] (23%) and deformities (14%). Deformities (19%) and scab (12%) accounted for most of the rejection in the bagged fruits. Rainy season harvest of unbagged fruits not subjected to hot water treatment resulted in 100 and 56% incidence of anthracnose [Glomerella cingulata] and stem-end rot [? Botryodiplodia theobromae], respectively. Disease incidence in fruits decreased significantly when dipped in hot water (53° for 5 or 10 minutes), with the 10-minute dip providing the most effective control. Bagging combined with a 10-minute hot water dip resulted in the least disease: anthracnose was reduced by 83%, stem-end rot by 100%, and fruit fly damage was reduced by 80%. Neither bagging nor hot water treatment affected total soluble solids at the table ripe stage.