Diseases & Environmental Issues
Apple Scab
Apple Scab is caused by a fungus that can be identified by black or brown lesions that appear on the leaves or fruits of the tree.
Cedar Apple Rust
Cedar Apple Rust causes colored spots on the leaves in the spring. In the summer, the spots turn into cone-like structures.
Diplodia Tip Blight
Diplodia Tip Blight kills the new tip of pine needles. Repeated years of dead tips can kill a tree.
Dothistroma Needle Blight
Dothistroma causes pine needles to turn brown at the tips while remaining green at the base. The two sections are separated by a reddish-brown band.
Dutch Elm Disease
Dutch Elm Disease is a colossally destructive disease to all North American species of elms.
Fire Blight
Fire Blight is a highly contagious disease. The name refers to the blackened appearance of the leaves of a plant infected with Fire Blight.
Oak Wilt
Oak Wilt is capable of rapidly killing an oak tree. Prevention and control of the spread are key when dealing with this disease.
Rhizosphaera Needle Cast
Rhizosphaera affects spruce trees. The disease kills the older, inner needles first. The infected needles turn brown before falling off.
Sycamore Anthracnose
Sycamore Anthracnose is a fungus disease that causes odd, unsightly growth patterns in the tree and an early loss of leaves.
Chlorosis
Chlorosis is a micro-nutrient deficiency where the tree lacks iron or manganese.
Girdling Roots
Girdling roots occur when the roots of a tree wrap around the base of the tree. This causes the flow of water and nutrients to be choked off from the rest of the tree.