What is perforating my osteospermums pls?

[LapdanceShoeshine]

Hundreds of neat little holes in both leaves & flowers. Can’t see any wildlife on the plants or compost.

Seems to be only (or mainly) these 2 plants in this pot.

Help!

Actually I say “neat little holes” - they were last week, it’s getting worse (munchers getting bigger?)

I have seen the odd cabbage white about...

Probably flea beetle damage - www.rhs.org.uk/advice/profile?PID=510

Thanks, Nan

Not much I can do then? I don’t want to use chemicals as I’m getting loads of bees, hoverflies, butterflies etc