We have a walnut tree in our yard, and recently, I've noticed some of the leaves on branches near the ground (1-2 feet) have been blistering pretty badly. Here (
http://community.webshots.com/album/154774350KaULTo] ) is a link to some pictures I took of the leaves. They're in the My Trees album and are the last few pictures in the album. I looked on the internet, and I was only able to find literature on Oak Blistering. We do have a burr oak in our yard as well, so could this have come from the Burr Oak? How harmful is this to the tree? What's the best way to get rid of this problem organically?
Thanks!
Casey