An invasive insect from Europe and the Middle East that attacks oak trees has recently been found in several Oregon white oaks in Wilsonville. The Mediterranean oak borer (Xyleborus monographus) transmits multiple fungal species to the trees it infests. Some fungal species may cause a disease called oak wilt, which may kill oak trees in as little as two to three years.
The departments of Forestry and Agriculture are asking people not to move firewood from oak trees beyond the local area where it is cut, to avoid spreading the insect pest. Landowners are asked to review the signs and symptoms of MOB below and report oaks with both crown dieback and any of the symptoms to the Oregon Invasives Hotline. MOB Fact Sheet Comments are closed.
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