Lawn grubs, often called white grubs, are the immature form of different beetles, such as Japanese beetles and June “bugs” (beetles). They feed on grass roots (and organic matter in the soil), causing sections of grass in the lawn to die. Grubs eventually turn into adult beetles and emerge from soil to mate and lay eggs, which hatch into more grubs. Peak grub feeding occurs in early fall. Typically grubs operate a few inches below the soil surface, but burrow deeper (up to 8 inches in northernmost areas) before winter arrives.
Symptoms of Grub Feeding