• Try using microbial insecticides to rid your lawn of grubs.weidenbohrer 1 image by Falkenauge from Fotolia.com
  
  

Milky Spore Effective

• Milky spore disease infects grubs when they feed on treated grass, according to Penn State. When grubs die, they release more bacteria in to the grass. Milky spore may take up to two full seasons before making a significant impact however.
  
  

Nematodes Work in Moist Conditions

• Nematodes work well for grub control if used correctly, according to the University of Florida. Nematodes need moist conditions to infect grubs, so frequent water applications prove necessary. Nematodes have been observed to survive several months in cool, moist conditions, but homeowners should realistically expect a lifespan of two to four weeks when used for grub control.
  
  

Bottom Line

• Try milky spore if the grub infestation is not serious, as milky spore does not work well on large grub populations. Use nematodes for more serious infestations and for faster results. Keep in mind that results from both methods remain somewhat inconclusive, according to the University of Rhode Island.