Overwintering begonia leaves developing white blotches (mold?)?

I have a 2 year old begonia I'm over wintering for the third time.


Now it seems to have developed what looks like mold on its leaves.


but I'm not sure if thats what it is, because it wont come off when I try to clean them.


any ideas?


Thanks

Overwintering begonia leaves developing white blotches (mold?)?
I do not know how to recover or make your plant mold free.





I do know that mold can and will grow on leaves sometimes even toxic mold can grow on leaves but mainly leaves that have fallen off a tree during the spring and fall.





You should consult your local garden store for help if you don't get the right answer here!





Good luck