Hi - I'm wondering if someone can help me save my pachysandra. about a year ago, a small patch started turning yellow and it slowly spread to neighboring plants. I read that it could be a fungus and that you should pull up all yellow plants. I did that and it seemed to slow the spread but now it's back. Is there anything I can do to stop the spread? Is there a treatment? Thanks for your help. PS I don't have a photo at the moment. but can take one if it would help.