Question
I have the grey white circles that look like the picture of the fungus on your site, on the trunk of my lilac tree.  What should I fertilize with?

Answer
Hi Jeannie:

Could you send me a photo of this on your lilac tree. I am drawing a blank at the moment and would like to see exactly what you are referring to.  Take a few shots, pick the best. Be sure to review it on your computer first, to be sure it is in focus and not fuzzy before you send.

Regards
Steve