Hello, I am looking for some help identifying what is killing our white pines trees. The disease is spreading slowly from tree to tree, but once infected it seems to only take 1 or 2 seasons to completely kill a tree. The trees appear to be rotting from the inside out. The trees needles turn yellow, then brown, and fall off. The bark then starts to fall off the trunks. When we cut the trees down, the insides are rotted out. The arborist we had to help remove some of the dying trees from around the cabin wasn't able to identify the disease; and none of the common white pine diseases I googled seem to match the symptons. I've attached some pictures of some infected trees. Any suggestions or recommendations would be appreciated. Mike These two trees were alive and well in April.