Clearing caterpillers

I have 3 long raised beds in my tunnel and this year I've been inundated with caterpillar problems. I think the issue was I had the doors open continuously and should have been putting my mesh door up to keep the butterflies out.

Anyway, the damage has been done now. Next year I will keep my mesh door in at all times!

All I want to do now is ensure is that get rid of any remaining beasties including the any pupa that may be lurking in the soil.

Any tips on how I do this please.

Cheers

If you had caterpillers on your tomatoes in there, then these do overwinter as pupae in the soil in purplish cases, so keep turning the soil over and hope the birds see them.