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Identifying features of various lawn pests.

Illustration Billbug adult is a small weevil (snout beetle), 1/3 inch long, with a long, downward-pointing snout and elbowed, clubbed antennae. It is often seen walking on paved areas but is difficult to find in turf unless a drench test is used.
Illustration Billbug larva is a creamy white, legless, 3/8-inch-long grub. The lack of legs distinguishes a billbug larva from a white grub larva.
IllustrationBlack turfgrass ataenius adult is a shiny jet black beetle, 1/5 inch long, with club-end antennae.
IllustrationChinch bug (southern) adult is small (less than 1/5 inch) and black with mostly white wings folded flat over the body. Both long- and short-winged forms may be present. Nymphs are bright red to black.
Illustration Armyworm and cutworm adults are dull brown or grayish, relatively large (up to 1-1/2 inches long), night-active moths.
Illustration Armyworm and cutworm larva are up to 2 inches long at maturity, larvae often curl up and lie still when disturbed.
IllustrationSkipper (fiery) adult is a 1-inch-long, orange to brownish butterfly with a hooked knob at the end of the antennae.
IllustrationLawn moth has an appendage in front of the head resembling a snout. Resting adults appear slender. When disturbed, the moth makes a short flight close to the grass. Adults are up to 3/4 inch long.
IllustrationSod webworm (lawn moth) larva is cream colored, 3/4 inch long, and has a distinctive double row of brown or black spots down its back, located at the base of long bristles.
IllustrationWhite grub (chafer) adult is a golden brown, up to 3/4-inch-long beetle with a dark brown head; it is hairy on the underside of its thorax.
Illustration White grub larva has a distinct brown head capsule and legs, is up to 1-1/2 inches long; the posterior portion of its abdomen is enlarged, and it typically curls tightly into a C-shape.

Identifying features of various lawn pests

Adult chafer from A. S. Packard. 1876. Guide to the Study of Insects. New York: Henry Holt; Sod webworm by R. M. Bohart. 1947. Hilgardia 17(8):275; other insect line art by Chittenden, Marlatt, or Webster from Sanderson, E. D. and C. F. Jackson. 1912. Elementary Entomology. Boston: Ginn.

Statewide IPM Program, Agriculture and Natural Resources, University of California
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