nasty little guys i had to plant under netting to prevent the adults from finding the plants. i did it in a regular garden where i put netting over everything that caterpillars would eat. kale, broccoli, cabbages, tomatoes. they dont like soap sprays or neem or cedar but that doesn't eradicate them. nematodes can eat them when theyre young but that is somewhat tedious and mostly just expensive. if you put a cage of any sort around your crop and cover with insect netting youll be a happy camper. it doesn't reaaaaly reduce yields from partial shading but i mean yea it does somewhat. just the way things go sometimes.