Common crops affected
Why it matters
Cabbage loopers chew large holes in lettuce and contaminate heads with frass, a major cause of leafy-crop rejection.
When it appears
On early instars before larvae reach the head; scout undersides and growing points.
How to identify it
- Green caterpillars with thin white side stripes that loop (arch) as they crawl.
- Large, irregular holes in leaves, progressing into heads and growing points.
- Dark green frass pellets in the canopy and heads.
How to manage it
- Apply Larva Control to young larvae with thorough coverage;
- repeat per pressure.
- Monitor early, treat at the right window above, and use cultural measures (sanitation, airflow/drainage or resistance/rotation as relevant).
Recommended Vegalab program
| Role | Product | Use |
|---|---|---|
| Primary control | Spore Control | Apply Larva Control to young larvae with thorough coverage; |
| Rotation / companion | MultiMite Control | Rotation or companion product |
Product claims, rates, and availability vary by jurisdiction; always follow the applicable label.