I have several Douglas Firs,Blue pruce and arbovitae that are slowly turning brown and dropping nedles. Most of these trees are 12-14 tall and have been established for at least 4 years. The arbovitae were recently planted last spring. I can't see any insects, but is there something I should look for? Is there something I can treat them with? I've seen several dead pines in the area, is there an epidemic? I have thousands of dollars into these guys, can you help me save them? Thank you!
