Who can I get to help me find out if my burr oak has oak wilt. I Called out an arborist and he said It had leaf wilt. Said he would have to spray it and fertalize in fall and spring for multiple years. Everything I read about spraying an oak suggests spraying in the spring. He also said that the crape Myrtle that is near the oak has it too because it and the oak share the same root area. Could not find anything out about leaf wilt on the internet. He said that something was not allowing moisture to get to the leaves. The Burr leaves are wilted and look silvery from a distance and is losing bark. The crape myrtle is also losing bark and leaves are turning yellow and falling off