u/Counter_Clockwise345

Noticed this white crumby looking patch on the underside of a leaf on my new Hoya Mitrata silver. Pests??

I have a callistophylla which is doing okay overall, though is a slow grower (got it 9 months ago, it’s gone from 4 leaves to 9) but seems prone to dropping new leaves when they’re still small. It doesn’t have any clubbing, and the leaves it has put out have no scarring… but I had to toss a Hoya recently due to a flat mite infestation. It wasn’t close to this one but I’m a bit worried now. Does anything look concerning? I have heard they’ll sometimes drop new emergents if they’re under watered. Note I did apply sulphur to the stems juuust in case.

Found them so challenging at first, but they’ve really grown on me (ha)