I have had white butterflies (moths) flying around my cabbage a bit too much this spring, so I knew it was time to hunt down their eggs and offspring on the brassica crops. I have 15 cabbages and 4 brussels sprouts growing. My wife helped out:
So far the damage was concentrated on the lower-most leaves, but we found as many as 8 little worms on each 6-10 inch plant. We’ll have to do this several more times over the next week or two.