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Tree Health

More Tree Health Issues Across the State

As the seasons change and the weather warms, DNR Forest Health staff tend to get more inquiries about tree health issues across the state. Some issues such as root diseases or Douglas-fir bark beetle mortality are relatively common, while others are less common but equally attention-getting. The latter includes red and dead branches, red and newly dead trees, and impacts on trees of various ages and sizes. A couple of issues in two of our most common tree species have emerged this year, including western hemlock defoliation and mortality, and tip dieback in Douglas-fir. You may have seen some...