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Paul from Savannah Georgia writes,

Will Aqua Neat Aquatic Herbicide kill duck weed


 Aqua Neat Aquatic Herbicide  is not labeled for duck weed. The Diquat Water Weed and Landscape Herbicide is labeled for duckweed control and will do a good job. For duckweed control, apply Diquat Water Weed and Landscape Herbicide at 1-2 gallons/A + 32 oz./A of surfactant in at least 100 gallons of water. Treatment of dense weed areas may result in oxygen loss from decomposition of dead weeds. This loss of oxygen may cause fish suffocation. Therefore, treat only 1/3 to ½ of the water body area at one time and wait 14

Answer last updated on: 04/02/2015

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