Field Identification
A defoliating caterpillar of field crops, vegetables, and weeds; late instars can strip plants rapidly during migrations. Often shows two-tone longitudinal stripes and a yellowish head—armyworm discipline without the cutworm burrowing habit.
Larvae range from green to nearly black with a distinctive dark lateral band and light stripes; adults are robust moths with patterned forewings. Multiple generations per year in warm regions.
How to Deal With It
Organic Control Methods
Bt products on young larvae; spinosad or neem for later instars when coverage is thorough.
Parasitic wasps and flies, plus ground beetles—foster diversity along field margins.
Till or incorporate weeds before larvae large-march; synchronize planting to outrun local peaks where historical data exist.
Ditches or barriers are marginal for flyers; hand collection on small plots at dusk.
Monitor with blacklight or sweep nets; watch weedy margins as sources.
Let Nature Handle It
Natural Enemies
- Braconid wasps
- Tachinid flies
- Ground beetles