C-shaped larvae in the soil are characteristic of which pest group?

C-shaped larvae in the soil are characteristic of which pest group?

• A. White grubs
• B. Billbugs
• C. Sod webworms
• D. Chinch bugs

Answer: (A)

In turf pest identification, the shape and location of the larval stage in the soil are key clues to the pest group. C-shaped larvae resting in the soil are classic for white grubs, which are the immature stages of scarab beetles such as June beetles, Japanese beetles, and chafer beetles. These grubs are typically creamy white with a brown head, and when disturbed they curl into a distinct C shape. This root-feeding habit damages turf by turning roots into a loose, easily pulled-up mat, which is why you often check the soil for these curled grubs to confirm the problem. Other pests have different larval forms or habits. Billbug larvae are white, legless grubs found near the crowns or roots but don’t have the same characteristic curled posture in soil. Sod webworms are caterpillars that live in thatch and feed on leaf tissue rather than roots, so their larvae don’t present as the classic C-shaped root-feeders. Chinch bug immatures live on the leaf blades and stems, not as soil-dwelling C-shaped grubs.

In turf pest identification, the shape and location of the larval stage in the soil are key clues to the pest group. C-shaped larvae resting in the soil are classic for white grubs, which are the immature stages of scarab beetles such as June beetles, Japanese beetles, and chafer beetles. These grubs are typically creamy white with a brown head, and when disturbed they curl into a distinct C shape. This root-feeding habit damages turf by turning roots into a loose, easily pulled-up mat, which is why you often check the soil for these curled grubs to confirm the problem.

Other pests have different larval forms or habits. Billbug larvae are white, legless grubs found near the crowns or roots but don’t have the same characteristic curled posture in soil. Sod webworms are caterpillars that live in thatch and feed on leaf tissue rather than roots, so their larvae don’t present as the classic C-shaped root-feeders. Chinch bug immatures live on the leaf blades and stems, not as soil-dwelling C-shaped grubs.