Nematodes are naturally occurring microscopic worms, already present in our soil in the UK. Beneficial nematodes attack and kill targeted garden pests. They are environmentally friendly, safe for children, pets and wildlife. Research scientists have isolated the nematode that kills specific garden pests including slugs, vine weevils, chafer grubs, leatherjackets, caterpillars, codling moth and various others. Millions of nematodes are bred to be easily applied by gardeners. When nematodes can no longer find prey they will die back to their original numbers.