Wow, you've been through it. I get it now and I didn't know that was possible. I hope that's not the case. I just looked up crown rot- it's a fungus. We've used Immunox for roses, and for the dogwood tree that kept dropping leaves (and it works). Wondering if that would stop the spread of it, if you did a mass spray? I looked on the website, and Immunox lists control of crown rot for the product.
