by Pacific Northwest Arborists | Mar 31, 2026 | Tree Disease
How to Identify Hazardous Trees Before Storm Season in the Pacific Northwest Trees are one of the Pacific Northwest’s greatest assets, providing shade, privacy, curb appeal, and long-term environmental value. But in a region known for seasonal windstorms, heavy rain,...
by Pacific Northwest Arborists | Mar 20, 2023 | Tree Disease
What is Dutch Elm Disease and How To Treat ItThe most common tree disease in the Portland, Oregon area is called “Dutch Elm Disease.”It is caused by a fungus that is spread by a beetle and attacks the tree’s vascular system, preventing water and...
by Pacific Northwest Arborists | May 1, 2021 | Tree Disease
EUROPEAN PEAR RUSTWHAT IT IS: Juniper Tree FungusEuropean Pear Rust is a disease caused by a rust fungus (Gymnosporangium sabinae). This fungus attacks both pear trees and juniper trees.FACT: the rust fungus needs both the pear and juniper tree to complete its life...
