There are several damaging maple tree diseases and pests. Basal canker – This maple fungus attacks the base of the tree and rots away the bark and wood beneath. More than likely it’s Verticillium Wilt. I had a younger one in the back yard with the same symptoms. Trees that suffer from drought typically die from the top down and from the outer branches in. what is this? Branches on a maple tree that are dead, dying, damaged, or diseased should be removed (ASAP) at any time of year. Cracks on Trunks. Other drought symptoms include wilting and yellowing of leaves and twig dieback. If your Japanese maple suddenly has a large branch, or a pretty big section of the tree that appears to suddenly just up and die. The fungi that cause verticillium wilt affect the tree's vascular system and causes symptoms of wilting and yellowing leaves that are concentrated in one particular area. the tree is about 20 years old. Galls and Burls. Signs of decay like the growth of mushrooms or fungi on the surface of the tree are a telltale sign that the tree is dying. Pruning a maple tree to create a nice shape and structure is best done in the late winter/early spring when the tree is dormant and the branch framework is visible. Unlike the branches of healthy trees, a dying tree's branches lack elasticity and do not bend. It usually starts with some discolored leaves, then the leaves turn brown and crispy and often will not drop from the tree right away. The success of treatment to declining maples depends primarily on early detection of maple decline, the health of the tree prior to treatment, and its ability to respond to treatment. Treatment for declining urban maples includes: watering, fertilizing, pruning dead branches, … This infection starts in the root system and works its way up the maple tree, resulting in cankers and dieback. The causal factors are Verticillium albo-atrum or Verticillium dahliae, which are fungi found in the soil.This is a common and serious problem that can even kill established trees. Trees often decay from the center towards its outer surface. Some of the most common are: Verticillium Wilt – Also called maple wilt, this fungus is a common and serious problem that can kill trees. Acer macrophyllum, the tree’s Latin name, translates as “maple large leaf.” The leaves are the biggest in the maple world, reaching a foot in width. Ensuring healthy trees is the best way to prevent the telltale maple tree dying signs. it had more dead than live limbs. This fungus looks very similar to a maple tree root disease called collar rot, but with collar rot, the bark typically does not fall away from the base of the tree. we cut it down . Maple Wilt. My Maple tree is dying at the top the lower branches have spots like a round fungus on them. Preventing Maple Tree Diseases & Pests. Acer macrophyllum, the tree’s Latin name, translates as “maple large leaf.” The leaves are the biggest in the maple world, reaching a foot in width. You can combat drought by thoroughly watering trees and mulching to retain moisture. One of the most common maple tree diseases is known as maple wilt. While maple trees can suffer from a number of general problems, verticillium wilt seems to be the most common and dangerous disease plaguing maple tree owners. Maple wilt seems to be most common in Norway maples but is also found in silver, sugar, red, sycamore and Japanese maples. To find out how much water your tree needs check out our watering article. Signs of Decay.