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ISHS Acta Horticulturae 455: V International Mango Symposium

DISEASE CONTROL IN PHILIPPINE 'CARABAO' MANGO WITH PREHARVEST BAGGING AND POSTHARVEST HOT WATER TREATMENT

Authors:   R.D. Buganic Jr, M.C.C. Lizada, M.B. de Ramos
DOI:   10.17660/ActaHortic.1997.455.101
Abstract:
Preharvest wrapping of mango fruits (two months after flower induction) with brown paper or newsprint was studied in different production areas. After field sorting and at the exporter's packinghouse, bagging resulted in at least 70% exportable fruits compared with only about 50% if unbagged. Rejection in unbagged fruits was due to insect damage (30%), scab (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 and stem-end rot, respectively. Disease incidence in fruits decreased significantly when dipped in hot water (53°C for 5 or 10 minutes) with the 10-minute dip providing more effective control. However bagging and a 10-minute hot water dip resulted in the least disease. Anthracnose was reduced by 83% and stem-end rot by 100%. Moreover, fruit fly damage was reduced by 80%. Neither bagging nor hot water treatment affected total soluble solids at the table ripe stage.

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