Avocado Root Rot issue
Although my heavy soil (clay) has concerned me...I have managed it with my avos for 15-20 years. Well, I am worried that one of my Hass trees is showing signs of Phytophthora. I am upset. My 16 varieties of avocados has been my retirement passion. The tree seems to have little vigor, has much small fruit (ripening), and has a branch that has died and turned black on the last 18 inches. What do you think??? Am I doomed?