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European Water Thistle has no known direct food value to
wildlife and is considered an invasive species. Other names for
this plant include: March Thistle, Swamp Thistle & Marsh Plume
Once introduced, European Marsh Thistle aggressively
colonizes natural areas, decreases biodiversity and compromises the
ecological integrity of an area.
European Marsh Thistle is an
herbaceous biennial that grows 4 to 5
feet in height. European Marsh Thistle is found
primarily in moist areas, near rivers and by ponds. Leaves in
first-year rosettes are spiny, long, deeply lobed and hairy on the
underside. On flowering plants, leaves are 6 to 8 inches long near
the base and shorter toward the top.
European Marsh Thistle forms a spiny
rosette consisting of a circle of leaves close ground (pictured on
the right in the photo below).
A. The entire
population should be treated as European Marsh Thistle is an
extremely invasive species.
A. Once water
temperatures are around sixty degrees or warmer.
A. It really depends
on the product you choose. For most vegetation, control will take
approximately 2 weeks however, tissue damage may be evident within
2 to 4 days with liquid formulations. Some products are slower
acting with results taking 30 days or more to achieve.
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