swiss needlecast fungus on my douglas fir
I have a very large douglas fir in my yard that was diagnosed by someone at Ronnys Garden World with Swiss needlecast. They said to wait until the new candles are half grown and spray with Infuse, then again several weeks later, around July. They stressed that timing is important and I would have to spray for at least 2 years. The tree is out in the open in a large yard, and I don't have any close neighbors. Ronny's suggested that I contact your office for further information. Any help you can give would be appreciated. Linda Robinson. Thank you.
Kent County Delaware