Which pest is most commonly associated with irregular brown patches that lift like a carpet when turf is disturbed?

Which pest is most commonly associated with irregular brown patches that lift like a carpet when turf is disturbed?

• A. White grubs
• B. Billbugs
• C. Chinch bugs
• D. Mole crickets

Answer: (A)

When turf shows irregular brown patches that lift up like a carpet when you lift the turf, the pattern points to root-feeding pests. White grubs—the C-shaped larvae of scarab beetles—live in the soil and chew on grass roots. This weakens the root system so the aboveground turf can no longer stay anchored; when you lift a piece of the patch, the turf comes up in a single, carpet-like sheet because the roots have been chewed away. The other pests can cause brown patches, but their symptoms don’t typically include that telltale carpet lift. Billbugs also feed on grass roots, but the damage often presents as thinning patches with different edge characteristics rather than a clean carpet lift. Chinch bugs cause wilting and stippling under hot, dry conditions and patches that look stressed rather than a turf piece that lifts out intact. Mole crickets create damage from tunneling and may produce raised, uneven areas with soil displaced, not the neat carpet-like lifting you see with grub damage. So the carpet-like lifting of turf patches is a classic sign that white grubs are feeding on the roots. You can confirm by gently lifting a small piece of the turf to look for grubs in the root zone.

When turf shows irregular brown patches that lift up like a carpet when you lift the turf, the pattern points to root-feeding pests. White grubs—the C-shaped larvae of scarab beetles—live in the soil and chew on grass roots. This weakens the root system so the aboveground turf can no longer stay anchored; when you lift a piece of the patch, the turf comes up in a single, carpet-like sheet because the roots have been chewed away.

The other pests can cause brown patches, but their symptoms don’t typically include that telltale carpet lift. Billbugs also feed on grass roots, but the damage often presents as thinning patches with different edge characteristics rather than a clean carpet lift. Chinch bugs cause wilting and stippling under hot, dry conditions and patches that look stressed rather than a turf piece that lifts out intact. Mole crickets create damage from tunneling and may produce raised, uneven areas with soil displaced, not the neat carpet-like lifting you see with grub damage.

So the carpet-like lifting of turf patches is a classic sign that white grubs are feeding on the roots. You can confirm by gently lifting a small piece of the turf to look for grubs in the root zone.