Field Identification
Click beetle larvae—shiny amber tubes that hollow out seeds, shred roots, and drill tubers like they paid rent. Damage shows as wilting transplants, missing stands, and potatoes that look shot.
Live many years in soil; prefer cool, moist, grassy fields recently flipped to vegetables. Bait potato slices disappear overnight when populations are real.
How to Deal With It
Organic Control Methods
Entomopathogenic nematodes (Steinernema feltiae/carpocapsae) in moist warm soil; spinosad on bait stations or seed treatments where labeled for organic production.
Ground beetles, spiders, and birds; fungal pathogens (Metarhizium, Beauveria) show variable field success—moisture is the gatekeeper.
Summer fallow + frequent shallow tillage to desiccate larvae; delay planting until soil warms; convert weedy sod slowly—sudden plow is a wireworm invitation.
Flame or solarize seed beds in high tunnels; hand-sort transplants if only a few beds are infested.
Soil bioassay with wheat germination or potato baits before committing the heirloom tomatoes.
Let Nature Handle It
Natural Enemies
- Ground Beetles
- Entomopathogenic Nematodes
- Birds
Threat Map