Trimming landmark trees

American Arborists takes pride in maintaining the trees located on the campus of University of Nevada at Reno.  When trimming mature high value trees like the elm trees located in the main quad there are some important practices to remember.  Like any other valued tree these trees were all climbed without spurs using ascenders and ropes, tools were cleaned with disinfectants and antibacterial spray to prevent the spread of disease.  It is important to have a Certified Arborist on staff to address and assess any concerns about structural stability or any other hazards especially in high traffic areas where failure could likely lead to damage to property or persons.  Remember not to get carried away with the removal of crown material, never exceed the removal of 20% it is easy to over thin or lion tale mature trees.  This practice can lead to unnecessary reactive growth and even tree stress decline or even death.