Grubs are the most common and difficult pest in Massachusetts. These beetle larvae feed on grass roots, killing large areas of turf in short periods of time and attracting animals such as skunks and moles that feed on grubs. One option in dealing with grubs is to plant a ground cover other than grass that will not perpetuate a grub problem. The most effective biological alternatives to pesticide use for grubs are two beneficial nematodes - Heterorhabditis bacteriophora and Steinernema glaseri. The use of these microscopic worm-like organisms is becoming more widespread and they can be found in many lawncare stores. To specifically control Japanese beetle grubs (white grubs), introduce a disease that kills these pests, called milky spore disease. Milky spore disease (commercially named Doom, Grub Attack, or Grub Killer) spreads slowly through the soil, possibly taking a season to bring the grub level down to one that the turf can handle, but the disease will continue to kill grubs for years.