3 Common Disease That May Affect Your Weeping Willow

There are many trees that can add appeal and value to your yard. However, the weeping willow is one tree that adds enormous whimsy, shade, and value to your landscape design. With its average heights and spreads of between 30 and 50 feet and its falling branches of foliage, it is easy to see why the weeping willow is a favorite among many homeowners. Unfortunately, this tree, like most others, is susceptible to disease. Here are a few common diseases that may affect your weeping willow tree.

Powdery Mildew

Caused by a fungus that spreads across the tree, powdery mildew is a common problem for many trees, but it can also affect your weeping willow.

Like the name suggests, a powdery residue on the leaves is the first sign of this disease. The residue may appear white or grey in color. As the mildew spreads, the leaves may begin to wilt and fall off.

If you see signs of powdery mildew, applying a fungicide to the entire tree can help. Also, trim off any foliage that is covered with the residue heavily. This will stop the fungus from spreading to other areas of the tree.


Another disease that may affect your weeping willow is the willow scab fungus.

In most cases, this fungus will first show signs on new foliage during the early part of the growing season. As it spreads, leaves may develop red patches or black blotches, which look like scabs. This is where the willow scab disease gets its name.

Because it is a fungus, apply a fungicide to your weeping willow if it is showing signs of this disease. Also, use pruning shears to trim off branches that contain foliage with these scabs.

Willow scab will spread fast. The patches and blotches of fungus may appear solely on the leaves at first, but the fungus will spread through the tree and into the roots. If this occurs, the tree will need to be removed before the fungus spreads to other plants and trees in your landscape.

Leaf Spot

Leaf spot is another disease that can affect your tree. Fortunately, leaf spot is more of a cosmetic disease, since the fungus does not usually spread into the roots where it can kill the tree.

The fungus causes spots on the leaves, usually on the underside instead of the top of the leaves. Leaf spot can cause your weeping willow to lose all of its leaves quickly. This early defoliation decreases the shade and appeal that you most likely love about the weeping willow.

To treat, trim away any diseased leaves and apply a fungicide to the tree.

Proper understanding will help you maintain the look and value of your weeping willow. By learning about these diseases, you will learn to diagnose and treat common diseases. Visit a site like http://www.prtree.com for more help.