Parks and Recreation System Master Plan Update (2016) parks_and_recreation_system_master_plan_update_oct | Page 465

below) and prescribed fire. 7 Many of the invasive species listed below are pictured in Appendix
2.
Type
Aquatics
Name
Eurasian Watermilfoil (Myriophyllum
spicatum)
Management
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


Herb
Garlic Mustard (Alliaria petiolata)
Japanese Chaff Flower (Achyranthes
japonica)
Giant Reed (Arundo donax)







Musk Thistle (Carduus nutans)



Poison Hemlock (Conium maculatum)



Purple Loosestrife (Lythrum salicaria) 

Japanese Stilt Grass (Microstegium
vinieum) 

Manual harvesting in early summer (peak biomass)
Manually raise or lower water to shade out or
dehydrate/freeze, respectively
Bankside plantings and shade barriers will shade out
the invasive
Application of Flouridone herbicide, which does not
affect drinking, swimming, or fishing after use.
Entire plant (plus root) can be removed by hand,
taking care that plant is carefully sealed and
removed from area to reduce spread of seeds.
Can use common herbicide glyphosate (Roundup®).
Entire plant (plus root) can be removed by hand,
taking care that plant is carefully sealed and
removed from area to reduce spread of seeds.
Can use common herbicide glyphosate (Roundup®).
Systemic herbicides is best, such as glyphosate
(Roundup®)
Prescribed burning, used alone or with herbicide
application, is effective after flowering
Once giant reed is reduced sufficiently, native plants
can be transplanted or seeded at the treated sites.
Hand pulling is most effective before development
of seeds, with minimal disturbance to soils to
prevent germination of seeds stored in soil
Flowers and seed heads should be bagged an
disposed of in a landfill
Apply a 2% solution of triclopyr and water plus a
0.5% non-ionic surfactant to all leaves and stems;
will not affect native grasses.
Repeated cutting before the plant goes to seed is
effective. The plant is a biennial so if it can be
prevented from seeding for three years, it can be
elimated.
Flowers and seed heads should be bagged an
disposed of in a landfill
Apply a 2% solution of triclopyr and water plus a
0.5% non-ionic surfactant to all leaves and stems;
will not affect native grasses.
Can be pulled by hand before seed set.
Use glyphosate herbicide for older plants, doing a
mid-summer and late season treatment to reduce
amount of seed produced.
Hand pull stilt grass in the late season, taking care
not to disturb the soil too much.
Can also mow in August and September when plants
are flowering but not seeded.
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