Applies easily as a foam in cracks

They work in attics and basements as well as outdoor structures such as sheds and garages

It also kills various annual and perennial weeds such as dandelions

4-Speed XT works quickly to stop hard-to-control weeds from taking over a landscape

According to the label

Gnatrol WDG Biological Larvicide Earwigs Applies easily as a foamHow Gnatrol WDG Biological Larvicide Works Gnatrol WDG Biological Larvicide is OMRI certified Larvicide gnat control contains bacillus thuringiensis, a soil dwelling bacterium that targets gnat larvae and kills them before they cause plant damage. Once the gnat larvae ingest the active ingredient, they become paralyzed and stop feeding; the larvae usually die within 24 hours. Gnatrol OMRI comes in a water dispersible granule formulation and doesn't