White Grub Control for Turf

White grubs are the soil-dwelling larvae of scarab beetles, including Japanese beetles, masked chafers, May/June beetles, and related species. They prune roots and can cause turf to detach from the soil.

How to Recognize White Grubs

Wilting, off-color turf develops into irregular brown patches that do not respond normally to irrigation. Damaged sod may roll back like loose carpet, exposing C-shaped cream-colored grubs; skunks, raccoons, and birds may intensify injury while feeding.

Why Damage Develops

Egg laying is influenced by species, soil moisture, and adult activity. Irrigated turf can attract egg laying and support young larvae, while drought-stressed or shallow-rooted turf shows injury sooner.

Reduce Pest Pressure

• Scout the turf and confirm the pest before treating.
• Correct irrigation, fertility, mowing, thatch, or compaction problems that weaken roots and crowns.
• Treat the susceptible life stage and preserve beneficial insects where practical.

What University Research and Extension Guidance Says

Extension guidance distinguishes preventive timing against small newly hatched grubs from curative timing against larger larvae. Sample the root zone and identify the grub when possible; irrigation after application is often essential for moving labeled products into the feeding zone.

Choosing and Timing a Turf Treatment

Use the products below as a starting point, then select a product labeled for the turf site and target pest. Match the application to the vulnerable life stage, place the material where the pest is feeding, and follow watering-in directions when treatment must reach the crown or root zone.

Research and label note: Research results help explain pest biology, timing, and product performance, but they do not expand a product label. Confirm the turf species, use site, target pest or nematode, life stage, rate, irrigation directions, and application interval on the current label before use.

University sources: NC State Extension: Arthropod Pests of North Carolina Turf; NC State Extension: Pest Control for Professional Turfgrass Managers.