Completed project
Identifying factors that contribute to mango resin canal discolouration (MG12018)
Publication date: December 14, 2018
Delivery Partner: The Queensland Department of Agriculture and Fisheries
Resin canal discolouration is a quality defect that reduces the market value of ripe mango fruit. When market reports of the defect increased over a period of two years, this project was undertaken in 2013 to start identifying possible factors that contribute to the discolouration.
A pre-season survey of mango growers, packers and wholesalers highlighted that rain around harvest, early fruit harvest maturity, and/or over use of chemicals were among the most commonly perceived factors that could be associated with this defect.
Research was carried out on Kensington Pride fruit produced around Darwin during the 2013 mango season. The research team monitored fruit from orchard to market, conducted specific trials on suspected contributing factors, and completed detailed scientific evaluation of affected fruit.
Findings suggest that…
The observations suggest that resin canal discolouration is likely to occur when field conditions result in the production of ‘sensitive’ fruit that, in turn, express the defect when exposed to the common harvest and postharvest stresses.
Further research was required to confirm the causes of resin canal discolouration and to develop reliable prevention measures.
This project was a strategic levy investment in the Hort Innovation Mango Fund
© 2026 Horticulture Innovation Australia Limited.
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