Please help--I believe the tree may be diseased--it is a leyland cypress tree with possible canker or blight disease, as there are brown patches throughout the tree (some near center of tree and on outer leaves of tree) and the tree looks like it is "thinning out" or going bald. What can I do to help this beautiful tree, as I think it may have been planted for 3-7 years, but am new to this house and unsure, How can I help this tree get helathy again and where do I get the materials to help it? Thank you so much.