How to identify
- Adults with bold orange/red and black geometric markings
- Barrel-shaped black-and-white eggs in neat rows
- White blotches and wilting on leaves
Damage: White scarring, wilting, and plant death under heavy pressure.
Control methods
- Hand-pick adults and crush egg masses early.
- Remove mustard-family weeds that host early generations.
- Use row cover on spring greens.
What products to use
We list product types and what to check on the label — not brand rankings, prices, or “we tested” claims. Always follow the label for your crop, and prefer the least disruptive option that works.
Insecticidal soap or neem (nymphs)
When: Young nymphs present
Look for: Labeled for harlequin bugs or plant bugs on brassicas; adults are harder to kill