A Quick Look at 5 Common Tree Diseases in the U.S.

A Quick Look at 5 Common Tree Diseases in the U.S.

A Quick Look at 5 Common Tree Diseases in the U.S.When trees are healthy, they can make your landscaping look much more attractive. But if a tree is diseased, then it can not only develop an unsightly appearance -- it can also pose a safety hazard. Diseased and damaged trees are much more likely to come crashing down during periods of high winds. So if you suspect that one of your trees is diseased, you'll want to have it inspected by a professional. At Woodpecker Tree Service, our local arborists can evaluate your trees and determine whether they're posing any safety concerns. Here's a look at five common North American tree diseases.

Oak Wilt

A brutal fungal disease, oak wilt is a significant killer of New Jersey's state tree, the red oak. Oak wilt prevents water and nutrients from circulating through the tree, which causes leaves to turn yellow and then brown, before the leaves are lost. While red oaks don't survive oak wilt, white oaks sometimes do manage to persevere.


Anthracnose is another fungal disease that commonly causes leaf loss and then death. But unlike oak wilt, it attacks a wide variety of trees and shrubs, rather than afflicting a particular species. Sycamores and dogwoods are especially prone to anthracnose.

Powdery Mildew

With powdery mildew, there are fungal threads growing on the leaf surfaces. Consequently, leaves will turn brown and fall off. This disease afflicts a wide variety of North American tree species.

Comandra Blister Rust

Comandra blister rust is a fungal disease that grows on the inner bark of pines. When it attacks pine trees, it often causes orange bands on the bark that are easily visible. Comandra blister rust can cause deformity, growth reduction, and death.

Apple Scab

Apple scab commonly infects crabapple trees, causing leaf lesions and leaf loss. This disease isn't typically fatal. However, it can make the trees look quite ugly. To address this problem, it's worth applying a fungicide during the time of bud break.

Arborist in Wharton, NJ

If there's a tree on your property that appears to be diseased, be sure to get in touch with a reputable arborist. For tree services in Wharton and Paterson, NJ, contact Woodpecker Tree Service at (973) 607-2549. Feel free to give us a call today to ask for a free arborist estimate in Wharton, NJ!

Woodpecker Tree Service Blog
Posted: July 2022

Written and Published By MORBiZ

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