Aphids can be a real pest in the vegetable garden. Here are a couple of articles to help you keep them under control.
Cabbage Worms (Loopers):
If you grow cabbage, broccoli, kale, or any other members of the brassicas family, you've no doubt dealt with these pests. Those "pretty white butterflies" are a sure sign that you need to be on the lookout for cabbage worms.
A hornworm infestation can decimate your tomato plants in no time. They are tricky to spot, however, because of their very effective camouflage. Once you spot them, though, getting rid of hornworms is actually fairly simple.