Lawn Insects

White Grubs

White Grubs are the most destructive lawn insect!

The grubs are the larva of beetles, they are milky white with a brown head and a darker tail. They will be curled up in a "C" shape and may be up to 1.7 cm (3/4 inch) long.

Grubs feed on the grass roots, damage is identified as dead grass that can be lifted like a piece of carpet. Grub damage is usually first noticed in mid to late August; damage will first occur in the sunniest, driest locations of the lawn. Damage can also occur from raccoons, skunks and birds digging up the lawn to feed on these grubs.

The best time to control grubs is when the larvae are small and actively feeding near the surface. Apply GrubOut® in late July or early August. A second application may be required in mid September.

Early spring applications of GrubOut® should only be made if the grubs are right at the surface and the soil temperature is fairly warm (15°C). The large larvae in the spring are more difficult to control.

Early spring applications should only be made if the grubs are right at the surface and the soil temperature is fairly warm (15 °C). The large larvae in the spring are more difficult to control.