I'm having the same problem here man, Damn caterpillars eating everything up..killed 3 butterflies today hoping they didn't already leave their babies in my plants. I'm going to go pick up some Safer brand caterpillar killer as I was told its effective and safe to use up until around harvest. That and BT, which is also organic.
Plants are looking great though man, I got a few grape apes too man!
Oh and you wanna get rid of the caterpillars sooner than later, one of my plants might be ruined from them already, I pulled over 25 of those little fuckers off of my plant yesterday, they were eating the buds from the inside out and left their lil poops everywhere which seemed to rot the bud away...
Goodluck!