Grub busters nematodes are naturally occurring microscopic worms with attitude. Each contains the toughest nematodes on the planet which kill soil pests such as grubs, flea larvae, weevils, cutworms, and more. It’s an easy 3 step gives, just open the place your sponge and paste into your hose end sprayer, fill with water and spray. Grub busters nematodes actively seek out grubs in soil and reproduce to provide you with a lasting natural pest control.