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Extension > Garden > Diagnose a problem > What insect is this? > Garden Pests > Caterpillars, maggots, grubs, and similar immature insects - Larger than 3/4 inch long > Cabbage loopers

Cabbage loopers

Trichoplusia ni

Cabbage loopers

Jeff Hahn, University of Minnesota

Cabbage loopers

Jeff Hahn, University of Minnesota


Size: Up to 1 1/2 inches long

Where/When: The larva prefers cole crops, such as cabbage, cauliflower, broccoli, kale, rutabaga, radishes, turnips, collards, horseradish, and other crucifers. The larva is active from July until the end of the growing season.

Significance: Damage may result in stunted growth; reduced yield; death of young seedlings; and malformation of cabbage, broccoli, or cauliflower.

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