Grub Worm Control in Northern Delaware and SE Pennsylvania

Optimal Timing

Mid‑July is the sweet spot. Spring grubs are too large; they’ll pupate soon. Eggs hatch mid‑ to late summer, and the young larvae are highly vulnerable to insecticides.

Product Selection

Choose a preventive containing imidacloprid (Merit)—less harmful to beneficial insects than older chemistries. Brands: Bayer All‑Season‑Long Grub Control, Scotts GrubEx. Check the active ingredient on the label.

Application

Apply evenly over the lawn within the next 30 days (from spring). Water in well to move product into the root zone where hatchlings will feed. One application provides season‑long protection.

Why Not Spring?

Spring treatment hits mature grubs that are hard to kill and misses the next generation. Mid‑July targets the damaging larval stage.