BeneficialSod webworms
Entomopathogenic nematode for sod webworms
Steinernema carpocapsae · nematode
Against sod webworms
Sod webworms live in silk-lined tunnels in the thatch and feed on the surface at night, the habit this nematode is suited to. UC IPM calls Steinernema carpocapsae a valuable control for sod webworms. UMass warns it is very vulnerable to drying out, so water it in straight away and keep the thatch moist afterwards.
Rate25 million per 1,000 ft² (about 270,000 /m²) (UC IPM)
TimingLate in the day, not at midday (the coolest time of day in hot areas), onto warm, moist but not soggy soil when a soap flush finds more than 15 per yd²; irrigate several times over the next 2 weeks
Temperature14–34 °C; best 19–31 °C
macro · entomopathogenic nematode on sod webworms
The pestSod webwormsCrambidae (Crambus, Parapediasia and relatives)Small ragged brown patches; grass blades notched and clippedFull pest profile →Before you order
Sprayed or watered onto moist lawn and bed soil against pests that move on the surface: cutworms, armyworms, sod webworms, billbugs and flea larvae outdoors. How it works, how to tell it has established and the supplier list are on the full Steinernema carpocapsae profile.
Release calculator
How many do I need?
Area and infestation level in; quantity, cost and a weekly schedule out. Open the calculator →
Other controls for sod webworms
- Bacillus thuringiensis kurstakiMicrobial insecticide · Label rate — DiPel DF lists sod webworm (Crambus spp.), turf 0.5–2 lb per acre
- Braconid waspsWild parasitoid · wild, attract it
- Rove beetlesWild predator · wild, attract it