Some time ago I posted about the use of Messenger on Rhododendron. I reported some remarkable successes against phytopthora root rot, but also some failures. Here's another failure and a partial success. Rhododendron x 'Dexter's Champagne' W. C. Slocock 1946 There were two plants planted very close together. Both have received drenches of Subdue twice every year. The first to contract the disease was treated with Messenger twice. Most of the plant died, but one large branch recovered and is doing well. The second plant didn't show symptoms until this winter (it had been treated with Messenger at the same time as the first plant and again last spring). By the time I got out there and noticed, it was pretty bad. I treated it 4 tmes with Messenger to no avail. I removed it yesterday. So, Messenger isn't fool proof. Perhaps if I'd treated it sooner????