Entomopathogenic nematodes such as Steinernema carpocapsae and Heterorhabditis bacteriophora have been used to control white grubs that feed turfgrass in your yard. When applied in turf these nematodes search and infect white grubs. They infect grub insects through the natural openings and once inside they release symbiotic bacteria in the body cavity of grub. Bacteria multiply and kill insect within 48 hours of infection.