Striped cutworm

Taxonomic position. Euxoa tessellata belongs to the order Lepidoptera, family Noctuidae. It is a well-known species within the cutworm group, characterized by larvae that dwell primarily in the topsoil layers and cause significant damage to agricultural crops.

Host crops. This species is a generalist feeder (polyphagous). It attacks a wide range of vegetable crops, including potatoes, cabbage, tomatoes, and carrots, as well as field crops like corn, cereals, sugar beets, and tobacco. Larvae thrive on both cultivated plants and various weeds present in the field.

Biology and life cycle. Typically, this species completes one generation per year. Overwintering usually occurs at the egg stage within the soil. In the spring, the larvae emerge and feed nocturnally, remaining hidden under soil clods during the day. Pupation takes place underground, followed by the emergence of adults, which feed on nectar and lay eggs.

Nature of damage. Young and middle-instar larvae are responsible for the most severe damage. They cut through the stems of young seedlings at or just below the soil surface, causing the plants to wilt and die. Older larvae can also burrow into roots, tubers, and root vegetables, creating cavities that promote decay and secondary fungal infections.

Control measures. Management of Euxoa tessellata relies on an integrated pest management (IPM) strategy. Essential practices include:

• Deep autumn plowing to disturb pupae and eggs.
• Effective weed control to reduce nesting sites.
• Crop rotation to break the pest cycle.
• Application of granular soil insecticides or foliar sprays when economic thresholds are reached.