Dylox 420 SL Insecticide works by both contact and ingestion. It rescues and protects lawns and turf from grubs and certain other insects that feed on them. When watered properly, this product can even penetrate thatch up to 1/2-inch thick.Active Ingredients: Trichlorfon 37.3%Insecticide Mode of Action: 1BInsecticide Class: OrganophosphatesEPA Signal Word: CAUTION / PRECAUCIONApplication Rate Range: (see label) Container Size(s): 2.5 Gal.