Homemade Grub Killer


Control your grubs if you want to maintain a healthy lawn and garden. Do this preferably in the spring, when last year's grubs emerge from the ground, or in the summer, when the second generation is small and easier to kill. Killing grubs will not only stop their destructive behavior, but also will prevent them from growing into beetles to continue their damage. While chemical grub killers work well, if you want to use a more organic treatment that you can mix at home, your best bet to eradicate grubs is to use nematodes, which are microscopic worms that enter the grubs' bodies and kill them.

Step 1

Purchase nematodes that contain Heterohohditis bacteriophora from your local nursery or online. You will need about 1 billion nematodes per acre (1 million per 50 square feet).

Step 2

Mix the nematodes with water in a special spray bottle with larger holes or in a sprinkling can (both available at your local nursery). Do so at a rate stated on the label, usually between 1 and 3 tsp. per gallon of water.

Step 3

Spray or sprinkle the mixture evenly on your lawn. Do this immediately after mixing so you do not drown the nematodes.

Step 4

Water the area with about 1 inch of water to soften the soil so the nematodes can easily work their way into the soil where the grubs are.

Things You'll Need

  • Nematodes
  • Spray bottle or can
  • Water


  • Western Massachusetts Master Gardener Association: Frequently Asked Gardening Questions
  • Pest Control Options: Natural Treatment For Lawn Grubs
  • Bulglocial Control Systems: Beneficial Nematodes -For Pest Insects

Who Can Help

  • Cornell University, NYS Integrated Pest Management Program: Grubs in Your Lawn?
Keywords: kill grubs, homemade grub killer, nematodes for grubs, organic grub control

About this Author

Melissa Lewis has been a professional writer since 2005. Her work has appeared in various online publications. A former elementary classroom teacher and media specialist, Lewis is also a script writer, with a movie script, "Homecoming," she co-wrote currently in production. She holds a Bachelor of Arts in psychology.