flea beetle attack

[drivingmisscrazy]

pretty sure this is what I have on my allotment (and it was all going so well...) - lots of tiny holes in my broccoli, kale and turnip seedlings. Any advice - I've lots of seedlings, which I have thinned and I only need a few of each to survive.

Anyone had any experience of this?

TIA

The little rascals head over from the oil seed rape crops near me. You can spray with pyrethrin but also try diatomaceous earth - fantastic stuff - you can dust it on plants -they don't like it.