Insects & Other Pests ›

Sod Webworm


The moths are 1/2 to 3/4 in. long. They have a prominent snout. The forewings are brown or dull ash gray with a whitish streak from the base to the margin; the hind wings are brownish. When at rest, the moths fold their wings closely. The tiny, oblong eggs are white to pale yellow. Most sod webworms vary from pinkish to yellowish to light brown. They become 5/8 to 1 in. long with thick bodies, coarse hairs and spots on each segment. The head is yellowish brown to black. Individual caterpillars often assume a C-shape. The reddish-brown pupae are oblong and 3/8 to 1/2 in. long.

Chemical Control

Recommendations for insecticides approved for control of these insects in home lawns can be found under Sod Webworms in Insect Control in Home Lawns in the NC Agricultural Chemicals Manual.

Recommendations for insecticides approved for use on sod farms, golf courses or other commercial sites can be found in Commercial Turf Insect Control in the NC Agricultural Chemicals Manual.

Insecticide and Formulation
Amount per 1,000 sq ft
Precaution and Remarks

acephate* (Lesco-Fate, Orthene T, T&O) (Precise 4G)

0.5 to 1 oz 2.8 lb

Home lawns only. Irrigate immediately.

azadirachtin* (Azatrol, Neemix, Turplex)

0.5 fl oz

Bacillus thuringiensis, various brands

1 to 2 lb/acre

bifenthrin* (Menace, Talstar, others) F, GC; G form also available

0.18 to 0.25 fl oz

Use GC formulation for golf courses.

carbaryl* (Sevin) 80 WSP

2.5 to 3 oz

chlorantraniliprole (Acelepryn)

0.046 to 0.092 fl oz

chlorpyrifos* (Dursban) 4 E, 2 E, 5 G, Pro

See label

For use on golf courses; check new label.

clothianidin (Arena) .5G 50 WDG

14 to 22 oz 0.15 to 0.22 oz

chlothianidin + bifenthrin (Aloft)

See label

cyfluthrin* (Tempo 2, Tempo Ultra)

0.143 fl oz

Irrigate immediately after application. Do not apply to newly seeded stands or bentgrass.

deltamethrin (Deltagard) G

2 to 3 lb

halofenozide (Mach 2) 2 SC 1.5 G

1.5 fl oz 1 lb

Can be used two times per season at these rates.

imidacloprid + bifenthrin (Allectus, Atera)

See label

Rate varies with pest. Different formulations for different sites.

indoxacarb (Provaunt) SC

0.0625 to 0.25 fl oz

Not labeled for use on sod farms.

lambda-cyhalothrin* (Cyonara, Scimitar, Battle)

See label

Do not make applications within 20 feet of any body of water. No reentry until spray has dried.

methomyl (Lannate) 90 SP

0.4 to 0.8 oz

permethrin* (Astro)

0.4 to 0.8 fl oz

spinosad A and D (Conserve) SC

0.25 to 1.25 fl oz

Rate varies with size and species.

trichlorfon* (Dylox, Proxol) 80 SP Dinotefuran (Zylam) 20SG

1.5 to 3 oz 1 oz per 1000 sf