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brockleytree.com/5-types-of-tree-bark-fungus

Beech bark disease is a newer threat affecting beech trees (Fagus grandifolia), and it’s brought about by native nectria fungus pairing up with the invasive European beech scale insect. The insects feed on the beech sap by burrowing into the bark, and once inside, the nectria fungus on the beech scale colonize the bark and interior of the tree.

idtools.org/id/citrus/diseases/gallery.php?page=3

Sweet orange tree more than half girdled by a Phytophthora lesion at the base of the tree. Phytophthora Trunk and branch canker on lemon showing gummosis and bark death on a tree.

tree-pictures.com/elmtreesbark.htm

Elm Tree Bark, Photo of American Elm Trunk, Close up Identification Photo of Elm Wood, Elm Trees Bark Dutch Elm Disease is a fungus which is spread by the elm bark beetle ElmTree, More pictures, images & photos of Elm trees

www.gotreequotes.com/common-tree-diseases-and-their-treatments

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.

www.sciencemag.org/news/2019/11/mysterious-disease-striking-american-beech-trees

A mysterious disease is striking American beech trees. By Gabriel Popkin Nov. 14, 2019 , 3:00 PM. A mysterious disease is starting to kill American beeches, one of eastern North America's most ...

www.citrus.com/blog/how-to-identify-and-treat-citrus-tree-diseases-and-insects

How To Identify And Treat Citrus Tree Diseases And Insects. June 27, 2018 / Gardening. Citrus Tree Diseases. Greasy Spot. Greasy spot is a fungus, known as Mycosphaerella citri, that affects the leaves of citrus trees and thrives in tropical and subtropical climates.

www.nativelanddesign.com/blog/texas-oak-wilt-how-to-spot-this-tree-disease-on...

A tree can look like fall is being forced upon it. Fungal symptoms include the development of fungal mats, which infected areas found beneath bark. The tree-destroying fungus is found in these mats and can be spread by insects that are attracted to the sweet-smelling spores. Some oak trees are more affected by oak wilt disease than others:

www.elitetreecare.com/2016/07/identifying-tree-diseases

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!)

rtectreecare.com/tree-fungus

Canker Diseases: Canker Diseases are caused by fungi that commonly enter the tree through wounds in the bark or branch stubs. Improper pruning can increase your risk of cankers. Thousands Canker Disease: Originally confined to the western parts of the United States, Thousands Canker Diseases, made it to Fairfax County in 2012.

www.gardenguides.com/100779-diseases-sweet-gum-tree.html

Several cankers form on the bark of sweet gum trees resulting in lesions that may become sunken with roughened bark that peels from the tree. Botryosphaeria canker may cause branch dieback, cosmetic damage and even the death of the tree. Keep your tree vigorous, as healthy trees are resistant to canker disease.