Powdery Mildew PSA

The City of Spokane's Urban Forester, Katie Kosanke, highlighted the prevalence of powdery mildew on maple trees this summer, particularly affecting varieties like Crimson King. While the sight of the fuzzy, white fungus may alarm residents, it is rarely harmful, with significant damage like distorted shoots or early leaf drop occurring infrequently. The WSU Extension recommends monitoring for signs of infection under favorable weather conditions, such as dry spells with warm days and cool nights. Residents are advised to pick off infected leaves and destroy fallen debris to minimize the spread of the disease. Pruning and spacing plants adequately can also improve air circulation, reducing the likelihood of infection.

The message reassures that this specific strain of powdery mildew does not pose a threat to gardens or other plant species. As such, residents can take proactive steps to manage their trees effectively. Overall, the guidance aims to mitigate concerns while promoting tree health in Spokane.