ISHS Acta Horticulturae 291: III International Mango Symposium
HEAT TREATMENTS FOR POST HARVEST DISEASE CONTROL IN MANGOES |
| Authors: | L.M. Rappel, A.W. Cooke, K.K. Jacobi, I.A. Wells |
| Abstract:
The efficacy of hot water treatment for disease control in mangoes cv. Kensington Pride was evaluated to gain preliminary information on the disease control potential of vapour heat technology (V.H.T.). Hot water treatments were applied alone or in combination with currently recommended post harvest fungicide dips. Fruit were dipped in hot water (49°C) until the flesh around the seed attained a temperature of 47°C for a duration of 10 minutes. Treatments including a hot benomyl dip (BenlateR 50% W.P. 1 g/L at 52°C for 5 min.) gave good control of stem end rot caused by Dothiorella dominicana and Lasiodiplodia theobromae. Treatments consisting of hot water only or hot water followed by prochloraz (SportakR 45% E.C. 0.55 ml/L for 30 sec.) gave only partial control of stem-end rot. All treatments gave good control of anthracnose caused by Colletotrichum gloeosporioides. Heat injury was observed frequently in hot water treated fruit. In vitro effects of a range of time x temperature combinations on the viability of axenic cultures of D. dominicana, L. theobromae and C. gloeosporioides have also been evaluated. The results of these tests and their application to V.H.T. are discussed. | |
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