Natural Ways to Kill Grubs in Your Lawn: 6 Methods That Work

Understanding Lawn Grubs

Grubs are the larval stage of beetles like Japanese beetles, June beetles, and European chafers. They feed on grass roots just below the soil surface, causing brown patches that roll up like carpet when you pull on them.

Method 1: Beneficial Nematodes

Heterorhabditis bacteriophora (Hb) nematodes are microscopic worms that seek out and kill grubs. Apply them to moist soil in early morning or evening. Water in well and keep the soil moist for 2 weeks. One application can reduce grub populations by 75-100%.

Method 2: Milky Spore Disease

Milky spore (Paenibacillus popilliae) is a natural bacteria that specifically targets Japanese beetle grubs. Apply granules to your lawn in fall. It takes 1-3 years to establish but provides 15-20 years of control once established.

Method 3: Neem Oil Spray

Azadirachtin in neem oil disrupts grub feeding and development. Mix according to package directions and apply to affected areas. It works best on young grubs and also deters adult beetles from laying eggs.

Additional Organic Methods

• Hand picking: Water the lawn in evening, then hand-pick adult beetles at dawn
• Soap spray: Mix 2 tablespoons dish soap per gallon of water, spray affected areas
• Predatory birds: Attract starlings and robins with birdbaths and feeders