Surviving the white cabbage moth

I've been watcing the Brassica seedlings we put in about 2 weeks ago and have been meticulously removing the white cabbage moth eggs from the leaves.

Some companion planting guides suggest Dill is a good companion which attracts a wasp that feeds off the moth eggs. Zinias also attract ladybirds that can keep the eggs down too.

Green Harvest suggests some organic remedies too, but handpicking is most effective I reckon!