Avenger Weed Killer Concentrate - 2 ct/2.5 gals (5 gals) - AWC2.5G02Avenger Weed Killer is a non staining, contact herbicide and excellent alternative to synthetic weed killers. As a non selective herbicide, it uses a citrus oil base (d Limonene) to eliminate broadleaf, crab grass and other unwanted weeds naturally and quickly. This concentrated formulation is easy to mix and comes with multiple mix rates for control of different types of weeds. Benefits of Avenger Weed Killer: OMRI listed, EPA registered and NOP