I have searched everywhere for a picture or similar symptom and can't find. I haven't seen any surface bugs but, I'm 61 now and can't see as well as I once could. This seems to start on the very top of a particular limb and work it's way down eventually killing whole limb. The leaves will turn bright (almost florescent) yellow at the base of the bud and turn brown and twist off. I'm just hoping someone has seen and cured.