Pond Logic Shoreline Defense, 1 qt (32 oz) Broad Spectrum Emergent Weed Control - Systemic Herbicide. Cannot be shipped to: AK, AZ, CA, CT, DC, HI, ME, NJ, NY, PR, RI, VT, WA or Canada Kills the roots of even the most persistent weeds Works great on cattails, phragmites, lilies, purple loosestrife & other emergent weeds Perfect for cleaning up beaches & shorelines 1 quart with treat up to 10,000 square feet