The cabbage looper is a common pest that primarily affects crops in the Brassicaceae family, such as cabbage, broccoli, and cauliflower. This caterpillar, the larval stage of the moth, is known for its distinctive looping movement as it moves along plant stems and leaves. Cabbage loopers are typically green with white stripes and can grow up to 1.5 inches long. They feed on the foliage of plants, causing significant damage if not controlled. Effective management strategies include crop rotation, natural predators, and insecticides when necessary.