Extension > Garden > Diagnose a problem > What insect is this? > Garden Pests > Caterpillars, maggots, grubs, and similar immature insects - 1/4 inch - 1/2 inch long > Diamondback moths

Diamondback moths

Plutella xylostella

Alton N. Sparks, Jr., University of Georgia, Bugwood.org

Description: Up to 1/3 inch 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 late May or June until the end of the growing season with numbers decreasing after Spring.

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

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