A Guide to Common Tree Diseases

In this article with Angie's List, Brad Wise, district manager of Davey's West Chicago office, tells readers about some common diseases they should be aware of when it comes to their trees. 

Posted: May 10, 2016

Next time you’re enjoying your beautiful landscape, remember what trees offer you and your family. Trees not only clean the air, but they also increase property value, cool your home and provide shade that blocks harmful UV rays. Trees are able to benefit us emotionally, environmentally and economically, but even they need attention from time to time.

So this spring, look up! Scan your trees. Spotting disease and treating it early on means you’re more likely to save the tree with an arborist's help and continue to enjoy all of those wonderful benefits.

Dutch elm disease

Dutch elm disease has killed millions of elm trees in the U.S. since 1930. Because bark beetles that travel between sick and healthy trees spread the disease, it’s crucial to remove infected trees from your landscape and grind them into wood chips. This stops beetles from spreading.

Dutch elm disease treatment options include preventive fungicide injections that help protect trees for two to three years. Combining treatment with proper pruning provides additional protection.

Thousand cankers disease

Caused by a fungus that the walnut twig beetle transports, thousand cankers disease attacks the innermost layer of a tree's bark, the phloem. When the beetle bores into the phloem, a canker will develop under the bark. The canker deprives the tree of nutrients from the top down, shutting down its vascular system.

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