According to BugGuide.net, this is what is eating the leaves off my broccoli plants. I don't have a lot of broccoli but would like to keep what I have. According to BugGuide.net, this critter will also eat tomato plants. I do have a lot of those, and I definitely want to keep them.

I'm trying to be as organic as possible this year and avoiding the toxic pesticides. Any advice on how I can handle this critter?