Tree Diseases of Washington State

Washington is unofficially nicknamed the Evergreen State for having a lush canopy of trees. There are a variety of trees that are used for commercial and environmental purposes from woodworking to watershed protection.Some of the most common tree species are: Western Hemlock,Western White Pine, White bark Pine, Ponderosa Pine, Western Larch, Sitka Spruce, Douglas Fir, Western Red Cedar,and Pacific Yew.

Unfortunately trees can be susceptible to tree diseases caused by bacteria,fungi,viruses, insects, and environmental factors. Here is a list of a few diseases that can affect your trees. (source)

Foliar Diseases

• Dothistroma Needle Blight
• Swiss Needle Cast
• Western Larch Foliar Disease

Root Diseases

• Annosus Root Disease
• Armillaria Root Disease
• Black Stain Root Disease
• Laminated Root Rot
• Schweinitzii Root and Butt Rot

Dwarf Mistletoe’s

• Douglas-fir Dwarf Mistletoe
• True Fir Dwarf Mistletoe
• Hemlock Dwarf Mistletoe
• Larch Dwarf Mistletoe

Other Diseases

• Elytroderma Disease of Ponderosa Pine
• Western Gall Rust
• White Pine Blister Rust

Don’t Delay Call an Arborist Today!

One of the best preventative measures to avoid tree diseases altogether is consulting with a professional . As a Certified Arborist we are able to give advice on tree disease prevention and have the knowledge and expertise to diagnose and treat tree diseases. Contact our Certified Arborist today at Infinity Tree Services LLC!