How to Get Rid of Lawn Bugs? | Stop Pests at the Source

For the full breakdown, see our best Bug Killer For Lawns guide.

Most home lawns get invaded by only a handful of common pests, and nearly all of them thrive in stressed turf. Figuring out how to get rid of lawn bugs starts with spotting which insect is doing the damage—and that single step decides whether your efforts actually work. Blanket-spraying an insecticide without a diagnosis usually wastes money and can make things worse by killing beneficial insects that keep pests in check.

You combine pest-resistant turf, proper mowing and irrigation, and spot-treatment only where pests are active.

Which Bug Is Eating Your Lawn?

Look at the damage pattern before you buy anything. Grubs kill grass in irregular patches that pull up easily, like loose carpet. Chinch bugs cause yellowing that starts near driveways or sidewalks and spreads outward in hot, dry conditions. Sod webworms and armyworms leave brown patches with chewed grass blades and sometimes visible silk webbing at the base.

To confirm grub activity, use the coffee-can test: cut both ends off a can, press one end about two inches into the soil, fill it with water, and wait 3 to 4 minutes. Grubs surface and float if they’re present. If you find fewer than five or six per square foot, treatment usually isn’t needed.

Prevention Comes First

Healthy turf resists pests far better than stressed grass. Mow at the recommended height for your grass type and keep the lawn dense—a thick canopy leaves little room for pests and weeds to establish.

• Water deeply and infrequently to encourage deep roots.
• Remove thatch over ½ inch thick and address compacted soil.
• Clear debris and weeds that shelter insects.
• Avoid heavy nitrogen fertilizer in hot months, which attracts some pests.

These cultural fixes do the heavy lifting. Pesticides work best as a targeted backup, not a first move.

The Right Treatment for Each Pest

Once you’ve identified the culprit, match the product to the pest and the season. Always read and follow the label exactly, and wear rubber gloves when mixing and spraying—many chemicals absorb through skin.

For foliar pests, UC IPM recommends irrigating well first, then treating as soon as the grass dries. Some root-feeding pests need much higher water volumes to push the pesticide into the soil. Spray formulations generally work better for foliar pests, while granular products work for grubs, billbugs, chinch bugs, and webworms.

Low-Toxicity Options That Work

Beneficial nematodes are a solid biological option for grubs and mole crickets. Bt targets caterpillars like sod webworms without harming other insects. A soapy-water drench—about 2 tablespoons of liquid detergent per gallon of water—can drive some insects to the surface. These options suit readers who want to minimize chemical use. For a tested roundup of the best products for persistent infestations, check out our guide to the best bug killer for lawns.

The most common mistake is treating without identification, which wastes money and leaves the real pest untouched. Timing also matters: grub controls are only effective at specific life stages, and under-watering before treatment prevents the product from reaching the root zone. If you’re unsure, spot-treat the damaged area first and monitor for a week rather than broadcasting chemicals across the whole yard.