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Silk algae (Spyrogyra spp.) has filaments that are fine textured and very slippery. When the algae is removed from water, the filaments form a fine point with little branching. It forms extensive floating mats that are usually grass green. Silk algae is most abundant in early spring and usually dissipates by mid-summer.
Silk algae can be raked from the pond or strained out with nets or seines. Dyes or physical barriers that shade the pond can be used with moderate success.
Information on Mechanical Treatment of Aquatic Vegetation
Grass carp will consume silk algae, but it is not a preferred food source. Please see the section on this website about grass carp and their use in controlling aquatic vegetation for more information.
Information on Biological Treatment of Aquatic Vegetation
The active ingredients that have been successful in treating silk algae include copper-based compounds (E), alkylamine salts of endothall (G), flumioxazin (G), and diquat (G). E = excellent; G = good.
Information on Chemical Treatment of Aquatic Vegetation
Return to the Filamentous Algae page
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