First you must identify the enemy. Try placing a wad of damp newspaper at the base of the plant and see if slugs, snails, earwigs or sow bugs crawl in after a couple of nights. Stomp on the culprits. Also look under the leaves for a small green worm-like larvae. Squish with your fingers. A strong jet of water to wash the leaves may also help to dislodge whatever is bugging your potatoes. Keep growing, Marianne Binetti