Looks a bit like the start of some powdery mildew. And considering it is late in the season, that's not terribly surprising - late summer/early fall is PM season. In fact, it's somewhat more surprising the little guy still has leaves left on it in November!!.

It is nothing to be very concerned about although I would make sure all the leaves are cleared up and disposed of when they do finally fall.

no use to treat leaf problems on a plant that will drop the leaves in a few weeks or so ...

mid november is pretty far from 'turning' to autumn... is it planted near that river... de nile??? ... lol ... we got 2 inches of snow last week.. its autumn.. trust me...

ignore it.. and spend a minute cleaning up the leaves so they arent there in spring...

ken

Thanks for the comments. Here in Maryland we generally get wimp winters, so it'll be in the 50s the rest of this week and probably not get cold for a month.

Powdery mildew spores not only overwinter in fallen leaf debris, but on the tree itself. I encourage the removal of all the dead and fllen leaves and old mulch later on in the winter. Then, before any kind of warm up in the spring, a thorough application of a dormant oil on the bark, twigs, and the buds can be an extremely helpful preventative treatment against another outbreak. It doesn’t need to even be a heavy dormant oil….Neem oil has been proven to be an excellent choice for this purpose. A fresh layer of mulch is important, pine straw being especially suited for this job.

I sure wouldn’t sit around waiting for spring!

If you're in the DC area, our 2023 rainfall total thus far is 12 inches below normal. Please deep water the little guy.