The BioAdvanced 24 Hour Grub Killer Plus is one of the most popular choices for immediate results. It contains Dylox, which starts working within 24 hours to kill grubs, cranefly larvae, and other soil-dwelling insects. This 10lb bag treats up to 5,000 square feet and is best applied when you notice brown patches or when the turf can be easily "rolled up" like a carpet.
If you need to treat a larger area, the BioAdvanced 24 Hour Grub Killer Plus - 20 lb offers the same fast-acting formula in a larger size, covering up to 10,000 square feet. It is specifically formulated to degrade quickly in the soil after application, meaning it doesn't leave long-term residues but effectively halts current damage to your grass roots.
Key Application Tips
Watering is Required: These products must be watered in with about 0.5 inches of water immediately after spreading to move the active ingredient down into the root zone where the grubs are feeding.
Timing: For the best results, apply when grubs are young and actively feeding near the surface, usually in late summer or early fall.
Safety: Once the lawn has been watered and allowed to dry completely, it is safe for children and pets to return to the area.