Why are sakuras in Uzhgorod marked? (PHOTOS)

Photos of sakuras marked with crosses were posted by Serhiy Denisenko in his page. Here’s what the author of the photos wrote:

"I do not want to be an alarmist, but I don’t like these crosses on sakuras in the area of Braschaiky street. There is an information that a big sanitary cutting is being planned, and most of the old sakuras in the Halahov neighbourhood are marked with such crosses. Yes, old and dangerous trees should be cut, no one argues about that. But if they cut down all the old sakuras at once, there will be a trouble."