My ash has been loosing its leaves since July. They turn yellowish green and fall off. We have been in a drought in minnesota, so I suspected it needed water. So I began giving it water every other day, giving it about an hour or 2 slow flow. But the leaves continue to fall. My neighbors ash does not look like this. The leaves are gone on some major branches of my ash. It does not look like it is infested with the emerald ash bore. I know the Sx and these appear different. there are no dead leaves on the tree. The leaves fall off before turning brown.