a tomato horn worm has a horn on it's head and it will try to bite you.......we use plastic gloves and warm water in a plastic bucket with any kind of liquid soap....maybe 3 teasp of it in a bucket of water and pick them off and drop them into this mix...............it is good to get them off before they lay anymore eggs................dump that down the drain....................mix up 1 teasp of liquid hand soap & 1 qt water and when the sun goes down spray everything in your edible garden............................I like using 2 layers of newspaper....not the shiney ones.....on the ground and I put grass clipping on top............bugs & worms do not like dead grass..............good luck with your garden....