ISHS Acta Horticulturae 645: VII International Mango Symposium
POSTHARVEST FUNGICIDE TREATMENTS IN MANGO FRUITS ACCORDING TO THE LEVEL OF QUIESCENT INFECTION OF PATHOGENS AT HARVEST |
| Authors: | D. Prusky, Y. Shalom, I. Kobiler, M. Akerman, Y. Fuchs |
| Keywords: | Disease control; quiescent infections, plant protection |
| Abstract:
The effectiveness of different postharvest treatments to control different levels of quiescent infections of Alternaria alternata causing Alternaria rot in mango fruits during storage was compared. A combined hot water spray and fruit brushing (hot water brushing - HWB) treatment for 15 - 20 s with 225 µg ml-1 prochloraz was the most effective treatment to control Alternaria rot in fruits with a high relative quiescent infected surface (RQIS) rating of 36 at harvest. Comparable control was obtained with the commercially used treatment of 900 µg ml-1 prochloraz spray. However Alternaria rot in mango fruits with intermediate levels of RQIS rating of 25 was controlled by HWB treatment alone or HWB with chlorine (300 µg ml-1 Troclosene Na). HWB alone was effective enough to control postharvest decay in fruits with a RQIS of 5. Present results have indicated that effectiveness of postharvest HWB and prochloraz applications, are dependent on the quiescent infected area of the fruit by A. alternata at harvest. A RQIS rating, before harvest, has resulted in the use of effective, mild, fungicides as a single postharvest treatment thus avoiding wide use of less friendly synthetic fungicides | |
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