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    Cleveland Metroparks Reports New Invasive Plant Threat, Restrications At Wallace Lake

    News & Press | July 2012

    Cleveland Metroparks Reports New Invasive Plant Threat, Restrications At Wallace Lake

    Posted: July 31, 2012
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    FOR MORE INFORMATION CONTACT:



    JANE CHRISTYSON - 216-635-3229 -or- 216-780-9592  



    BOB ROTATORI - 216-635-3263 -or- 216-339-1699



    Hydrilla (Hydrilla verticillata) is a highly
    invasive aquatic weed that researches believe came from Africa or
    Southeast Asia. It is often called the �perfect� aquatic weed
    because of its ability to grow rapidly under just about any
    conditions.  Unfortunately, this perfect plant grows so fast
    that it chokes out all other plants and animals in an affected body
    of water.



    �Researchers in Ohio who have been on the look-out for this
    plant, suggest that Hydrilla is not presently wide-spread, and
    aggressive control efforts in Wallace Lake have a good chance of
    eradicating it and halting it,� said Cleveland Metroparks Chief of
    Natural Resources John Mack.  Wallace Lake is in Mill Stream
    Run Reservation in Berea.  �Cleveland Metroparks adopted an
    early detection/early control approach to new invasive plant
    invaders in its 2009 Invasive Plant Management Program Plan,� Mack
    continued.  �Hydrilla represents the first significant
    occurrence of a new invasive plant that warrants full
    implementation of this approach since this program was
    adopted.�



    The herbicide SONARTM is being used to treat Wallace
    Lake. It is added to the lake at  very low concentrations for
    long periods of time, generally 30 to 60 days.  It will be
    gradually absorbed by the plant until it is killed. There are no
    restrictions on human ingestion of or contact with
    SONARTM at the low concentration that will be used at
    Wallace Lake, and the treatment will also act against other
    nuisance aquatic weeds while not effecting more beneficial aquatic
    plants. These treatments will likely need to occur for several
    years until the Hydrilla has been eradicated.



    The following actions at Wallace Lake are being taken to limit
    the spread of Hydrilla:



    Boats - all watercraft brought by visitors will be
    prohibited until it is determined that there is little or no risk
    of spread of Hydrilla from Wallace Lake. Cleveland Metroparks
    kayaks and paddleboats will continue to be used within the
    restricted buoyed area of the lake during the remainder of the 2012
    season because Cleveland Metroparks controls the placement and
    cleaning of these boats. The restriction on boating is likely to
    continue through September.



    Fishing - will be prohibited during the active
    SONARTM treatment period, which will continue through
    August 26.  Signs will be posted.



    Swimming - will continue with no restrictions in
    the current beach area.



    For more information, call 216-635-3200.


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