Any Ideas as to Azalea Losses?

Question

I am on Wadmalaw Island SC. I have about 30 well established large azaleas and about 20 small “suzikis” (sp) About two years ago some of both varieties started getting yellow leaves and then dying branch by branch. I saw no obvious pests, and cut out the branches. The bush died anyway. The problem has slowly spread bush by bush from the first area. Any suggestions?

Answer 1

Unfortunately, I suspect that it may be Phytophthora Root Rot. This article will have more information:
https://www.gardeningknowhow.com/ornamental/shrubs/azalea/phytophthora-root-rot-azaleas.htm