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Hydrilla Verticillata Warning
 This plant threatens
to invade and choke Michigan waterways!
Nonnative species are a great threat to the Great Lakes region.
So far, much focus has been placed on sea lamprey, zebra mussels,
alewife, spiny water fleas, ruffe, goby, purple loosestrife and
Eurasian watermilfoil. Soon, another species - Hydrilla
verticillata – may join this list.
Hydrilla is a robust aquatic plant that may survive and thrive in
waters of this area. As of April 2007, biologists have found no
evidence of hydrilla in Michigan’s shallow Great Lakes bays, 11,000
inland lakes or thousands of miles of streams. However, the level of
concern for ecological damage and economic harm to Michigan’s water
resources has increased due to the fact that hydrillais now known to
exist within 50 miles of the Michigan border in Lake Manitou,
Indiana, as well as two other Great Lakes states - Pennsylvania and
New York.
Hydrilla Fact Sheet
Hydrilla Hunt Card
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