Answer: If the damage is to foliage, I would suspect slugs. They work at night so you would not see them, but you might see shimmery trails of slug slime. You can hand pick them in the late evening or at night by flashlight, or control them by sprinkling diatomaceous earth on the soil surface around each plant. They can also be trapped in shallow saucers sunk into the ground and filled with stale beer. Sometimes you can also find them hiding under nearby mulch during the day.
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