Apple trees begin visible growth in the Spring of the year after having had their chilling requirement met, measured as chilling hours (800-1200 hours), followed by a specific amount of warm weather, measured as growing degree-hours (approx.. 300 hours). The first growth to appear in the Spring is the leaves and the trees will bloom approximately 3-4 weeks later. The date on which apple trees bloom in a location can vary annually based upon fluctuating winter and spring temperatures and …
The whitish over color or “bloom” on the surface of the apple fruit
In the orchard the surface of the fruit with a powdery white coating that can be easily rubbed off. The coating is referred to as bloom and consists of minute scales of wax. The wax is excreted by the epidermal cells of the fruit. The wax coating helps preserve the fruit and reduce evaporation. In an article by Belding et al. (1998) they determined that ursolic acid accounted for 32 to 70% of the hydrocarbons that make up the epicuticular …