Sudden Oak Death has been confirmed across parts of Humboldt County for years, and the pathogen continues to move through tanoak and coast live oak stands during the wetter months and show symptoms as summer heat sets in.
Early signs include dark, weeping cankers on the trunk, wilting foliage that stays attached to the branch, and a general decline that can look like drought stress at first glance. Tanoaks are especially vulnerable and often die faster than infected oaks.
Because the disease spreads through soil, water, and infected plant material, removal and disposal have to be handled carefully to avoid moving spores to unaffected trees nearby. This isn't a job for general yard cleanup.
If you have oaks or tanoaks on your property that look off this summer, an assessment now can tell you whether it's Sudden Oak Death or something more manageable.
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Authentic job photo preferred: a crew member assessing a declining oak or tanoak on a Humboldt County property, or a close-up of trunk cankers if available. Real diagnostic photos build more trust than a generic forest image.
Canva text suggestion: "Sudden Oak Death Is Spreading, Know the Signs" or "Protecting Humboldt County's Tanoaks and Oaks"