Which sign would you associate with grub feeding on turf roots?

• A. Thinning turf due to root feeding by grubs
• B. Yellow patches
• C. Brown patches with fecal matter
• D. Leaf curling

Answer: (A)

Grubs feeding on roots damage the underground system that holds the turf in place and supplies water and nutrients. The most telling sign is thinning turf in patches where the roots have been eaten, because with the roots damaged, the grass can’t stay vigorous or stand up as well. You might even notice the patches feel loose and lift up more easily since the root network is compromised. This direct link between root injury and thinning makes it the best match for grub activity. The other signs are usually tied to different problems—above-ground pests, disease, or environmental stress—rather than grub damage to the roots.