INFLUENCE OF HARVESTING DATE, DPA TREATMENT AND STORAGE CONDITIONS ON SCALD APPEARANCE ON ´GRANNY SMITH´ FROM SANDY SOIL

Scald is economically the most important non-parasitic disease that can occur in storage chamber.
In conditions of Suboticko-Horgoska sandy terrain (north of Serbia) on sandy soil ripening of ‘Granny Smith’ is much faster than in other regions with black soils.
Practically, scald is unavoidable in these conditions unless we use post-ripening in storage chambers and then store apples.
With this option fruit quality decreases especially because of reduced acid content and change of fruit color.
Knowing that the end of October is critical when observing first frosts in this region, we set a trial with three picking dates in October, two DPA concentrations (1200 and 1800 ppm) with adding Irol and storage in NA and Ca conditions.
Trials had shown that for apples from sands both DPA concentrations were very effective in all three picking times in NA and CA conditions of storage.
Although scald appearance in control treatment in CA conditions was highly reduced in terms of intensity and frequency of appearance, treatment with DPA is needed probably with lower concentration than it is used.

V International Postharvest Symposium

D. Gvozdenovic, N. Magazin

apple, ´Granny Smith´, scald, sandy soil

https://doi.org/10.17660/ActaHortic.2005.682.284