Does anyone know what would cause sudden browning of the tips of a Shimpaku juniper. The tree is about 20 years old and put out lots of new growth this summer. Water drained fairly well and I was going to repot next spring. I hadn't checked the tree in a couple of days, but when I did, the lower branches on the lower right half of the tree had about 1/6th of their tips brown. I read an article titled "Emergency Treatment" by Tomio Yamada where a juniper he had, had and entire branch turn brown then die. The problem with his tree was root rot. He mentioned foul smelling, mushy, roots as the problem. One of his suggestions was re-potting. I did this with 80% river gravel/20% fired clay. However, I didn't see the signs of root rot mentioned in the article, therefore, I didn't prune any of the roots. The roots were very damp however and probably had been that way for a week or so due to frequent rain. Question, is it possible that the tree was in the beginning stages of root rot and I simply did not notice it? Also, should I spray the tree with a fungicide? Any other advice would be welcome. Thanks in advance.