dilute it a lil more than you normally would... better than nothing...and better than risking burning your plants.
out here we don't really have to worry about caterpillers as long as you grow out in the open, if you're growing under trees and in the brush sometimes there are caterpillers here and there... but out in the open they get fucked up by the wasps lol...and out here where I live we're a desert valley where there are atleast 10 different species of wasp that eat bugs that would normally harm the plants... perfect harmony
I mean not that my plants don't get bitten... they just get one leaf eaten every now and then, a few marks on the lower leaves from minor thrip infestation that never goes overboard, and a few tiny bites on the top leaves every here and there... these are things I accept and I have great healthy plants pesticide free... just let the natural environment take over, don't shew a wasp away from your plant, they're hella good. I've seen them go leaf to leaf, looking for bugs and shit.