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Plant Identification -- Submerged Weeds -- Watermilfoil |
WATERMILFOIL (Myriophyllum spp.)
Treatment Tips: Often occurs in extensive patches crowding out all other growth. Granular herbicide is most effective on low growing plants. Treat when plants are established, before flowering occurs.
Description: Stem is hollow with whorled leaves at intervals along entire length of plant. Leaves are finely dissected to mid-rib and feather-like in appearance. Plant submerged except for a stalk of tiny flowers which may extend above water surface. Do not confuse with Chara.
Distribution: Numerous species of milfoil are common throughout the U.S.
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Recommended Control Method: Navigate evenly at the rate of 100 pounds per surface acre. Use for early season application on low-growing plants.
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Maintenance Control Method: Add Aquashade at the rate of 1 quart per acre-foot of water to prevent initial growth or to retard regrowth of plants after chemical treatment.
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Alternate Control Methods: Aquathol Granular: 81 to 108 pounds per acre-foot.
Aquathol K liquid: 1.9 to 2.6 gallons per acre-foot.
Cutrine-Plus/Aquathol K: tank mix at the ratio of 1:3. Apply at the rate of 2 gallons per acre-foot.
Cutrine-Plus/Reward: tank mix at the ratio of 1:1. Apply at the rate of 1-2 gallons per surface acre.
Reward: 1 to 2 gallons per surface acre.
Fluridone (various liquid or pelletized formulations): 0.027 to 0.05 qt. per acre-foot (see label).
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Descriptions and pictures are from the book "How to Identify and Control Water Weeds and Algae", Edited by James C. Schmidt, 5th edition revised 1998, copyright 1976 Applied Biochemists. |
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