The moths you are seeing are likely the adults of the oak leaftier caterpillar. The caterpillars feed largely on oaks and then pupate and emerge as the small yellowish moths. The adult moths do no damage and no control is needed. There is only one generation of these per year.

More information (and a photo of the moth) can be found here:
http://entnemdept.ufl.edu/foltz/eny3541/Leaftier.htm