No. Rub it off and see if it grows back. It may be a powdery mildew. Water when needed but dry it up some. Those pics are a bit fuzzy to see on my phone. Are they threads or spores?
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.