Gnatrol WDG Biological Larvicide Roaches 4-Speed XT gets its name

4-Speed XT gets its name from the four active ingredients that help it work

2 pounds of the active ingredient per application on noncommercial sites

Avoid contact with eyes

Use Cy-Kick CS Insecticide for Effective Pest Control

When you need better control of your greenhouse plants

Gnatrol WDG Biological Larvicide Roaches 4-Speed XT gets its nameHow 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