Does anyone know what insect would be chewing oak leaves right at the base of the leaf at the top of the petiole? They aren't chewing or skeletonizing other parts of the leaves, just at the petiole. It is affecting two post oaks out of 25 in a local park. I have heard anthracnose can cause leaf abscission, but the damage is definitely from chewing. There is no leaf discoloration, just a little darkened at the point of damage. Caterpillar, longhorned beetle....? I am not sure. Thanks.
