Tree Diseases


Learn about tree diseases from Mauget’s experts.

Learn how to spot tree diseases, which trees are susceptible to tree diseases, the damage these diseases cause, and how to cure tree diseases.

An anthracnose infestation first shows as spots or blotches on leaves, or as discolorations on evergreen needles. Spores of the fungus spread in spring through the air or by rainwater. Anthracnose stunts leaf growth, and may also kill buds, twigs and shoots before they mature.

Bacterial Leaf Scorch
Not every brown edged leaf is a sign of a tree or leaf disease. Leaves often show a small amount of stress from late summer heat. If the browning of leaves is greater than normal however, the cause could be a serious plant disease that calls for prompt treatment.

Fusarium Wilt
These destructive fungi can devastate trees and plants, and several species in particular, such as Fusarium oxysporum (Fusarium Wilt), have become a serious concern for arborists and horticulturists caring for palm trees throughout Southern California. Fusarium wilt is almost always fatal, especially in young trees and plants, and is responsible for the increased die-off in Southern California’s ornamental palms.

Rhizosphaera Needle Cast
Rhizosphaera needle cast has been causing problems in Spruce trees throughout the Midwest and the Northeast the past several years. Although Rhizosphaera Needle Cast can affect a number of conifer trees it is primarily a problem on Colorado Blue Spruce. This disease causes the trees to defoliate which affects the overall appearance and eventually the health of the affected tree.

Fire Blight
As spring arrives, many plants come out of dormancy. With this, many diseases come out of dormancy as well. One common example is Fire Blight.

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