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United States Department of Agriculture

Agricultural Research Service

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Image Number K9651-7

Giant salvinia is a fast-growing fern that can clog ponds and lakes. Forming mats up to 2 feet thick, the plant gobbles up oxygen and blocks sunlight needed by other water dwellers. A tiny weevil, Cyrtobagous salviniae, is under study as a biocontrol for this obnoxious invader.

Photo by Scott Bauer.



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Last Modified: 5/23/2006