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Common Tree Bark Diseases . One of the most common and serious types of disease on trees is tree cankers. These are areas of bark that have died on the trunks or branches of trees. There are several things that could cause the death of the bark in a particular area, such as physical damage caused by impact, bacteria, or fungi. ...


This tree bark disease is an infection that appears reddish-brown and like a wound. It’s caused by a combination of the European beech scale insects’ feeding habits and at least two different species of Nectria fungus. The infection will make the foliage look sparse and yellow, and the crown will look much thinner. ...


Beech bark disease is a disease that causes mortality and defects in beech trees in the eastern United States, Canada and Europe. In North America, the disease occurs after extensive bark invasion by the beech scale insect, Cryptococcus fagisuga.Through a presently unknown mechanism, excessive feeding by this insect causes two different fungi (Neonectria faginata (previously Nectria coccinea ...


Bark and Trunk Diseases. Beech Bark Disease affects beech trees and is caused by the combination of a beech scale insect’s feeding habits and an opportunistic fungal pathogen. An early sign of beech bark disease is a visible infection on the tree’s bark that looks like a reddish-brown, oozing, bleeding wound. (Yuck!)


Oak trees are common woodland trees and popular landscape trees. Most are large, up to 100 feet tall or more, with a broad canopy. Some small oak trees have a shrubby irregular form. Oak trees can be grown for shade, screening or wildlife habitat. They are susceptible to numerous diseases, especially fungal. Many ...


Dutch Elm disease, one of the most destructive shade tree diseases in North America, is caused by a fungus spread by the elm bark beetle. First reported in the U.S in 1928, the disease is believed to have been brought over from the Netherlands in a shipment of logs.


Canker tree disease comes in three common forms, Cytospora, Nectria, and Phomopsis, and resembles a blister on the tree’s bark or branch much like a canker sore. Cytospora canker commonly infects pine, poplar, spruce, and willow trees; Nectria canker is known to infect honey locust, maple, and oak trees; Phomopsis canker might attack ...


Root Rot (also known as Brown Rot or Collar Rot) is a citrus tree disease caused by the soil-inhabiting fungus, Phytophthora. Root Rot symptoms include dark brown or black patches of hardened bark on the tree trunk, mainly at the base. It is also common for ooze to seep from the affected area.


Avoid wounding the bark of affected trees. Care for the tree as normal, minimizing any stresses. Ganoderma root rot: A butt rot may take several years to kill the tree but makes the tree very susceptible to wind-throw. A distinctive shelf-like fruiting structure forms singly on the wood at or near the soil line.


Spruce diseases discussed, symptoms, disease cycle, ... trunk through wounds (usually where the branch meets the trunk of the tree), killing the cambium layer and leaving dead bark. This dead tissue is called a “canker.” ... Because Cytospora canker is a stress- induced disease, trees should be planted in sites that are favorable to their ...