What is causing the leaves on the tips of trees to suddenly turn brown in Winchester, VA 22601? We have been getting asked this question a lot lately. Is is due to the Cicadas. It is called flagging. It should not affect trees negatively. Do not waste time, energy and resources on this issue is my advice. Old Town Tree is and all inclusive full service tree company. Please call us with any tree care needs. Our local arborists in Winchester, VA are here to help!