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Because the trees are also proportionally narrower in spread , you may be able to fit two or three trees into a small space , making them a better choice for the urban landscape . Control efforts with fungicides require reapplication every 7 to 14 days . Laboratory freezing tests indicate that Alderman is as hardy as hardy high-quality plums such as superior and Underwood . It can involve an abuse of power , threats relating to work success , promotional prospects , pay or intimidation by means of aggressive or offensive manner . Most dwarfing rootstocks grafted to pears in colder regions carry an OH X F designation followed by a number . Such conditions allow water to be absorbed by the plant but lost only slowly by means of normal transpiration through the leaf surface .