Just like humans and animals, trees suffer from different diseases too. Under normal circumstances, infections occur due to various types of bacteria and fungi. At times, a tree may even die owing to a persistent illness or infection, a situation which often proves to be one of the most heartbreaking scenarios for any tree-professional, hobbyist or gardener.

tree diseaseDifferent aspects play roles when it comes to tree diseases. For instance, the type of infection or sickness a tree suffers has a lot to do with its geographical area, soil quality and type, weather conditions, different plants existing around the tree and the tree’s own health situation. To sum it up, the region where a tree is planted mainly dictates what diseases and infections one needs to worry about regarding the tree.

In most cases, a tree does not die from a disease. Curing a certain tree disease is perfectly possible after identification of the fungus or bacterium that is causing the disease. At times, if the situation is serious, professional help may be necessary. In case the plant cannot be saved, a professional can remove it competitively. Moreover, if the commonly prevalent diseases of a particular location are known, it becomes easy to combat unfortunate situations. Making use of trees which possess resistance to the potential diseases is a good idea. Other than that, if one is willing to monitor soil, light, fertilizer and water condition on a regular basis, tree infections can be rightly prevented.

Cancer Tree Disease

Canker Tree disease : Often giving an impression of tree branch or bark blister, this disease has 3 common types – Nectria, Phomopsis and Cytospora. This disease occurs due to fungal or bacterial infection on open wound on a tree branch.

Cytospora : Mostly infects spruce, willow, pine, and poplar trees.

Nectria: Mostly infects maple, oak and honey locust trees.

Phomopsis: Mostly infects Russian olive, juniper, arborvitae and Douglas fir trees.

Heart Rot tree disease

Various fungi that grow on bare wood or open branch wound, especially Fistulina Hepatica and the likes, are often responsible for this disease. The growth of mushroom or conk bodies is regarded as a likely indicator of heart rot tree disease, since such growth is suggestive of certain presence of fungus.

The disease normally affects trees having broken branches or trees having witnessed fire, animal or insect damage. Improper pruning is a leading cause too. Deciduous trees like cedar, maple, beech, birch, dogwood etc. are common victims of this condition.

Powdery Mildew tree disease

Being most prevalent in warm and dry climates, powdery mildew is mostly triggered by Erysiphale variety of fungi. A potential sign of the existence of this disease is talcum-powder-like gray or white powdery growth on the tree leaves.

If the conditions seem suitable, mildew can attack almost any kind of vegetation. However, linden, catalpa, crabapple and chokeberry are the most susceptible to this disease.

Root and Butt Rot disease

Infecting butts and roots of many hardwood trees, this disease has 3 types:


Butts as well as roots of trees having broad leaves or weakened conifer are mostly infected.

Hypoxylon deustum

Hardwood butts or roots are attacked using mechanical wounds.

Black root rot

Stressed hardwood roots are decayed.

The cause of this disease is mostly black leather-like fungus, for instance, the viral Serpula himantioides fungus, spreading up the trunks of a tree from the ground. When this disease is present, the presence of mushroom at the tree base is a likely sight.

Sooty Mold disease

The Sooty Mold fungus is black-colored, powder-like coating seen on the leaves of a tree or the soil surrounding it. Feeding off insect honeydew, this fungus consists of molds of Limacinula, Capnodium, Scorias, Antennariella, Cladosporium and Aureobasidium varieties.

This disease is known to affect many species of feeding-insect prevalent trees. Elm, maple, boxelder and linden are most likely to suffer from this particular disease.

Verticillum Wilt disease

Being highly contagious in nature due to the quick-spreading capability of the Verticillum fungus using soil, this disease attacks a tree via the root system of the tree. This soil-borne condition mostly affects maple, elm, stone fruit and catalpa trees. Primarily, this condition causes tree leaves to become lighter colored and kind of disheveled. Consequently, leaves wilt and drop from the tree branches.


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