Some of the silver maples along the walkway behind the units on Lexington East have leaves that are covered with red bumps. These bumps are called "galls" and are caused by the Maple Bladder Gall Mite. More information about the mites and the galls they produce can be read here and here, but the bottom line is that this is a cosmetic problem and they are highly unlikely to harm the trees. Therefore, I do not plan to spend any budget money or take any actions to control them.
