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Technical Assistance and Questions |
Brazilian
elodea Class B Noxious Weed
History As its name indicates, Brazilian elodea is from South America and was originally introduced to North America for aquarium use. Up until 1996 it was commonly sold in Washington pet stores and plant nurseries. Method of Spread Brazilian elodea reproduces by the spread of plant fragments. Branches sprout from "double nodes" located at intervals along the stems. The plant is probably spread most often when aquariums are dumped in our lakes or when boaters carry it from an infested lake into an uninfested waterbody. Brazilian elodea grows very well in Washington lakes once introduced and soon forms dense mats that choke out our native aquatic plants. These mats are unsightly, interfere with swimming, boating and fishing, and provide poor habitat for fish. Methods of control Brazilian elodea is difficult to control because it has few natural predators. Some aquatic herbicides are effective in controlling its growth. Grass carp have shown promise as a control technique, but are not an option in lakes with anadromous fish runs (salmon). Harvesting allows small plant fragments to spread to new areas, limiting its success as a control method. Identification
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For questions about the Lake Stewardship Program or the contents of this page, please contact Sally Abella, 206-296-8382. For questions about the Updated: August 25, 2004 |
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