Hi Gramma, Just noticed that no body has answered.
Could be aphids, slugs, grasshoppers or some type of worm???
You could spray with soapy water & alcohol.
I would move that plant away from the others just to be
on the safe side.
--
Cheers Wendy

Remove PETERPAN for email reply

Gramma wrote:
My husband's orchid which has been established, through some kind off
line emails pictures, as a sarcochilus hartmanii , is now flowering
but I noticed this morning that the petals appear to be getting eaten
- they have chunks out of them so it's pretty obvious [!] unless the
rain could have caused it as they are not protected by any cover.

On the ones which haven't got chunks missing out of them there are
some tiny tiny grey spots, I can't see anything running around on
them so what do I do?
Spray them with something?
if so what?

Gramma