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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 ...


Maple trees experiencing peeling bark may have contracted a fungal disease called verticillium wilt, according to the University of Minnesota. It is important for gardeners to identify the signs of verticillium wilt, because the disease mimics some of the same symptoms of herbicide or mechanical injuries.


Major new tree disease epidemics: beech bark disease. Annual Review of Phytopathology 32:75-87. Kasson, M.T., and W.H. Livingston. 2009. Spatial distribution of Neonectria species associated with beech bark disease in northern Maine. Mycologia 101(2):190-195.


As the tree bloats, pressure builds against the hardened inner bark and may split the bark if that pressure becomes too high. Bark Splitting Treatment: As this condition typically occurs during the growth cycle of a tree, protecting the resulting wounds from insect infestation and disease is essential.


The fungus that causes Dutch elm disease is transmitted by insects such as bark beetles and it causes the vascular system of the tree to clog, restricting the flow of water and nutrients. The main symptoms of the disease are browning and wilting of the leaves which will lead to defoliation and branch dieback.


Root collar rot, a disease caused by soil microorganisms, kills the bark and outer wood on honeylocusts at the ground line, essentially girdling the tree by a canker. All ages and cultivars of honeylocust, including thornless and podless cultivars, are susceptible to cankers and collar rot.


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.


The curly branches suggest your trees have Elytroderma, a common fungal disease that also causes bark death. The orange I suspect is the traces of bark beetles, more likely to infest trees weakened by the fungus.


As evident by the name, Ash Dieback is typically a disease that is common with Ash trees. It is caused by a fungal infection that goes by the name of Chalara Fraxinea, or C. Fraxinea for short. This disease primarily causes the tree to shed its leaves, with visible lesions in the stem that look a burn, and crown dieback.


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 ...