Not a ton, but at some point those larva will drop onto the ground and pupate in the dirt. Beneficial nematodes will eat those son bitches, so making sure you’ve got good healthy soil and a strong biome should guard against a serious infestation. Squish em in the leaves, watch for eggs or raised bumps, check around the garden to make sure another plant isn’t hosting some crazy infestation, etc. I dilute garlic oil and spray on 1x week, or OHN is what I’m trying out now. Build some healthy soil and nature will watch out for you. There are wiser folks than I that have already weighed in, good luck man. I plant a lot of smelly cooking herbs, thyme and basil and mint, and I try to provide habitat for predators nearby.