Abstract
A field experiment was conducted in a private orchard located at Al-Gadeda region/Diyala governorate during 2021 growing season on apple tree cv. Sharaby grafted on the Agmee rootstock, to study the effect of exogenous application of triacontanol, boron, and low biuret urea on physical and chemical characteristics of apple fruit, using RCBD with three factors, foliar spray of Triacontanol at three conc.(0, 5, and 10 ml liter -1) applied three times( Red bud stage, before full bloom and one month after fruits set, boron at two concentrations (0 and 100 ml liter-1) applied twice( before opening the bloom and two weeks later), and low biuret urea at 0, 0.5 and 1 % sprayed twice one month after fruits set and two weeks later), The results revealed a significant differences between treated plants compared with untreated one in most of the studied traits(Fruits length, Fruits diameter, juice Total Sugar, Sorbitol, and Mannitol ).
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