If you’re faced with a grub infestation, and you don’t want to use a chemical pesticide, turn to Mother Nature instead! Beneficial nematodes are small microscopic worms. They are mixed in with water to wake them up and sprayed on grass. Once in the soil, they search for a host, which is usually a grub. The nematodes carry a pathogen that they inject into the host grub, and that pathogen multiplies and kills the grub within a day or two. Then the nematodes lay their eggs on the dead grub. New babies go out and search for more. Mother Nature comes through again.