5 Common North American Tree Diseases

5 Common North American Tree Diseases

5 Common North American Tree DiseasesIf you suspect that a tree on your property is diseased, then you'll want to have an arborist conduct an inspection. When a tree is diseased or dying, it is more likely to come crashing down during periods of high wind. At BP Tree Services, our local arborists can come by and let you know if any of your trees are posing a heightened safety threat. Give us a call for arborist services in the greater Sacramento area when you think one of your big trees may be diseased. Here are five common tree diseases in North America.

Powdery Mildew

Many types of trees can be affected by powdery mildew, which causes fungal threads to grow on leaves. Then the leaves dry up, turn brown, and fall off. Fortunately, trees are usually able to survive bouts of powdery mildew.

Oak Wilt

Oak wilt is a fungal disease that prevents proper water/nutrient circulation, often causing oak trees to die within a year. A symptom of oak wilt is leaf veins that turn yellow before turning brown. Then, the tree will start to become defoliated.


Another fungal disease, anthracnose afflicts a variety of trees and shrubs. It's particularly known for affecting dogwoods. Anthracnose symptoms can vary between plant species, but defoliation and death often result.

Sooty Mold

Sooty mold often affects fruit trees in Northern California. One of the biggest drawbacks of this disease is that it commonly brings along aphids. This disease typically doesn't kill trees, but causes black splotches and yellowing of leaves. When fruit trees are afflicted with sooty mold, the fruit can usually still be eaten after being washed with mild soap and warm water.

Apple Scab

Apple scab commonly affects crabapple trees, causing leaf lesions and, ultimately, leaf loss. While apple scab doesn't typically kill the tree, it can cause a severe reduction in aesthetic appeal, which is especially problematic with flowering crabapples that are grown for their attractiveness. You can help to prevent this issue by using fungicides when buds are breaking.

Arborist in Sacramento, CA

When you need an arborist in Sacramento and the surrounding area, contact BP Tree Services at (916) 237-1882. Feel free to give us a call today to ask for a free arborist quote in Sacramento!

BP Tree Services Blog
Posted: July 2022

Written and Published By MORBiZ