holes in leaves

I've got several potted tomato plants, which I've recently been noticing holes and chew places on the leaves. I also found some small piles of black poop. I was starting to suspect this was the work of caterpillars, and they when I found a little green one on my shirt afterwards, I was quite...

My pest problem has been wrecking havoc on my pumpkin plant in my small garden outside. The other plants, watermelon, tomato, and cucumber, haven't have this bad of a problem. I'm not quite sure what it is but I'm worry that I'll wake up tomorrow morning and find my pumpkin plant all gone...