Tree Diseases

Unusual or different patterns on tree leaves can be a sign of a viral infection.

Individual Leyland cypress branches die (flagging) is a sign of cankers or lesions from fungal diseases.

Often a fatal fungal disease characterized by sudden wilting and dieback of branches.

Keep evergreen spruce trees healthy to keep Cytospora fungal spores at bay.

Have you ever seen fuzzy brown growth on peach fruit? Brown rot also appears on leaves and shriveled infected blossoms.

Discula anthracnose disease on dogwood causes leaf spots with tan or purple borders on the leaves.

A variety of deciduous landscape trees in Maryland are susceptible to this bacterial disease.

Powdery white growth on the leaf surfaces of trees is a fungus that grows and spreads rapidly when warm days are followed by cool nights.

The abnormal mass of twigs and leaves on deciduous and evergreen woody plants is known as a witches' broom.

Dr. Dave Clement, University of Maryland Extension Plant Pathologist, explains two common diseases of this popular evergreen tree.