I was weeding my raised bed garden preparing for planting when I saw the same thing a few weeks ago. After careful examination, I saw they were tomato hornworms. I've battled them the last 2 years, and I can tell you they will decimate your tomatoes. They strip the plants of everything but stems and leave tell-tale drops of green droppings and grow rapidly. It can happen overnight.

The ones I saw recently were very small. I've used BT to treat the plants in the past and was successful. I picked out the ones I found this year, but I'm going to be diligent and ready with the BT at a moment's notice!

I have noticed this year 3 other kinds of caterpillars in the garden, but they're not green. I guess the return of rain and vegetation has brought a healthy insect population as well!

Do a search on Google images for the hornworm and see if that's what you have. If not, just do a search for caterpillars in texas that are green and see what you get. Good luck!!

You can safely use a product called BT worm killer. I only use it on my veggies and leave the catapillars alone in the rest of the yard. I ran out this fall/winter and had major damage to my cabbage.