Living and Gardening in North Idaho Zone 5b,
Try using some Diatomaceous Earth "FOOD GRADE!" I sprinkled it on my peas. The first few leaves had bug bites but as soon as I used the DE, the next day as the new leaves sprouted I didn't have any bug bites out of the leaves!!!! It is important to rinse any veggie free of the DE before you eat it! You may have to keep dusting them during the season. Good luck!