Trichogramma wasps for cross-striped cabbageworm
Cross-striped cabbageworm lays its eggs in clusters, and UMass passes on a supplier's view (Evergreen Growers Supply) that Trichogramma work better against moths with clustered eggs, so releases may suit farms where this pest has been a problem. That is a supplier claim rather than a trial result. UMass also cautions that they parasitise non-target caterpillars, so take care if you keep wildflowers that might attract endangered moths or butterflies.
Before you order
Released weekly from cards while moths are flying and laying; the wasps kill the eggs before a caterpillar hatches. How it works, how to tell it has established and the supplier list are on the full Trichogramma spp. profile.
How many do I need?
Area and infestation level in; quantity, cost and a weekly schedule out. Open the calculator →
Other controls for cross-striped cabbageworm
- Bacillus thuringiensis kurstakiMicrobial insecticide · Label rate — DiPel DF lists cross-striped cabbageworm, 0.5–2 lb per acre on leafy brassicas; the Thuricide home label does not list it
- Braconid waspsWild parasitoid · Wild — plant sweet alyssum or buckwheat near the brassicas