Professional Tree Disease Control in Minneapolis & St. Paul

Tree Squad's tree disease control professionals will help you deal with harmful threats to your trees, including the management of the following diseases:



Anthracnose is a group of diseases that cause a wide range of symptoms. These include leaf spots, defoliation, blotches/distortion, twig cankers, shoot blight, and dieback on many species of deciduous trees.

Oak Wilt

Oak wilt is caused by a fungus called Ceratocystis fagacearum. It kills an overwhelmingly large number of trees in Minnesota every year.

Dutch Elm Disease

Like Oak Wilt, Dutch elm disease is caused by fungus that is spread by elm bark beetles. As a result of its appearance in North America in the early 20th century, a significant number of American elm trees have died and disappeared from their native ecosystems.

Diplodia Shoot Blight & Canker

Diplodia shoot blight and canker is another fungal disease that is prevalent in the Midwestern United States. It impacts a variety of pines, including red, jack, Scots, and mugo. It also affects other conifers like cedars, cypresses, firs, spruces, and junipers.


Cankers are dead sections of trees that occur as the result of numerous diseases. Fungi or bacteria are often responsible for cankers, but mechanical injuries to the tree by other pathogens can cause cankers as well.

Apple Scab

Apple scab tends to impact Malus trees. It is caused by Venturia inaequalis and appears as dull black or grey-brown lesions on the surface of leaves, fruit, or buds. Apple trees are very susceptible to this disease.

Cytospora Canker

Cytospora canker is a canker found most often on older trees. The trees that have been weakened by environmental stress like drought or harsh weather are more susceptible to infection. In Minnesota this disease is most often found on Colorado blue spruce trees. However, all spruce trees are at risk of infection, given the right conditions.

Armillaria Root Rot

Sometimes called shoestring root rot, Armillaria root rot is caused by a number of fungal species of Armillaria, which tends to infect deciduous and coniferous tree species.







Cedar-Hawthorn Rust

Cedar-hawthorn rust is a common disease that affects a number of tree species. This includes eastern red cedars, Rocky Mountain junipers, southern red cedars, apple and cranberry trees, prostrate junipers, and on many fruit trees. This disease can live through Minnesota's harsh winter as galls on infected junipers.

Rhizosphaera Needle Cast

Rhizosphaera needle cast is caused by fungi of the genus family Rhizosphaera. Symptoms typically appear on the lower branches and work from the inside out, effectively killing the whole tree.