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Yellowstriped armyworm (Spodoptera ornithogalli) is a common pest of many vegetable crops including greens, tomatoes, peppers, and cole crops. The larva varies from dark grey to black in color with two prominent yellow stripes along each side. Below this yellow stripe there are other less distinct stripes including a pink stripe above the prolegs. Two dark triangles may be apparent on the top of each segment. There may be a noticeable dark spot above and behind the hind legs, but this can be difficult to see on darker larvae. The dark head capsule has a net-like pattern. The larva can reach 13/4 inches in length.

Yellowstriped armyworm on cabbage leaf

(Photo: UKY Vegetable IPM Team, University of Kentucky)

Management:

• As with other armyworm species, it is much easier to control small larvae as larger stages are more tolerant of some insecticides. Therefore, transplanted crops and young plants should be monitoring regularly for early detection of yellowstriped armyworm. 
• Insecticides listed for corn earworm are generally effective against small larvae while those listed for beet armyworm may be more effective against larger stages. 

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