- Written by Robbi Hoy
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Helpful Tip from the Garden Geeks: If you come across a handful or two of your garden's cabbage loopers that are chalky white and appear weak, grab them! They are infested with nuclear polyhedrosis virus (NPV). Put the infected loopers in a blender (I know ...ewwww) with water and spray the concoction over your crops. The remaining pests will die within 3 or 4 days.