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Corn Gluten
Beyond Pesticides Rating: Non-Toxic

Corn gluten meal, the protein fraction in corn, is an herbicide that inhibits root formation in a wide variety of grasses and broadleaf weeds during germination. It is a waste product from corn milling and has been used in fish food, dog food, and other animal foods. Corn gluten meal, because of its high nitrogen content can be applied to turf grass as a fertilizer and top dressing. Although large application rates are needed, it is an effective preemergent herbicide that suppresses growth of annual weeds such as crabgrass.