Green Gobbler 1 Gallon 20% Vinegar Weed Killer. Derived naturally from corn, this non-selective herbicide kills annual and perennial weeds and grasses without toxic chemicals. OMRI listed and certified for organic use, it is free of sulfates, VOCs, bleach, dyes, or chloride. It does not contain glyphosate or other harmful chemicals and degrades promptly in the soil. Comes in a F-style gallon bottle with a trigger spray head.