The Plant Clinic has already confirmed a case of oak wilt for 1999, so keep an eye out for this oak disease.
Symptoms vary depending on the oak species involved.
The leaves curl slightly and turn a dull pale green, bronze, or tan, starting at the margins. Usually, by late summer, an infected tree has dropped all of its leaves. We have seen red oaks move through initial symptoms to total defoliation in as little as three weeks. The white and bur oak group generally shows symptoms on scattered branches of the crown. Leaves become light brown or straw-colored from the leaf tip toward the base.