Cabbage worm damage. they hide very well. no doubt about it, cabbage worms. yes sevin dust or spray would control them, as well as organic BT powder/liquid

How do you integrate pics to your posts? Is it through a file sharing site?

What about garlic/red-pepper spray? I made some last year and it took care of the aphids I had very well. I'm on a super limited budget (hence the growing from seed) and I'd like to not have to go purchase something.

The pictures are all uploaded at Photobucket. On the album page where it shows the thumbnails of the pictures, I just copied and pasted what it says in the HTML box.

I'm not sure how limited your budget is but the dipel dust BT powder only cost me a few dollars at the garden center and it's lasted me several years and I still have more than half the bag left. The liquid BT can be more expensive for a lesser quantity. I don't think the garlic/red pepper spray will kill the cabbage worms. If you look really closely, you will see tiny green worms and pick them off, but they are really hard to find b/c they are the same color as the leaves.