Parks and Recreation System Master Plan Update (2016) parks_and_recreation_system_master_plan_update_oct | Page 466

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Chinese Silver Grass (Miscanthus
sinensis)
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Perilla Mint (Perilla frutescens) 
Common Reed (Phragmites australis) 
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Japanese Knotweed (Polygonum
cuspidatum)
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Johnson Grass (Sorghum halepense)
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Common Mullein (Verbascum thapsus)
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Trees
Tree-of-heaven (Ailanthus altissima)
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Silk Tree or Mimosa (Albizia
julibrissin)
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Can use a 2% solution of glyphosate mixed with
water (8 oz. per 3 gals. Mix) and a surfactant in late
summer.
Systemic herbicides is best, such as glyphosate
(Roundup®)
Prescribed burning, used alone or with herbicide
application, is effective after flowering
Once Chinese Silver Grass is reduced sufficiently,
native plants can be transplanted or seeded at the
treated sites.
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®).
A glyphosate-based herbicide designed for wetland
use (Rodeo®) is best applied in late summer/early
fall
Prescribed burning of the plant after it has flowered,
alone or combined with herbicidal treatment, is
effective.
Small populations can be removed by hand, being
careful not to disturb the soil too much and to bag
and dispose of all plant parts in a trash dumpster
Cut stem about 2 inches above ground level and
apply 25% solution of glyphosate or triclopyr and
water to cross-section of stem
For larger populations, apply 2% solution of
glyphosate or triclopyr, 0.5% of non-ionic
surfactant, and water to thoroughly wet all foliage,
but not heavy enough to drip off leaves; ambient air
temperature should be above 65°F.
Systemic herbicides is best, such as glyphosate
(Roundup®)
Prescribed burning, used alone or with herbicide
application, is effective after flowering
Once Johnson Grass is reduced sufficiently, native
plants can be transplanted or seeded at the treated
sites.
Mullein plants can be easily pulled on loose soils
due to shallow tap roots; care should be taken to
minimize soil disturbance
Apply a herbicidal treatment of 2% solution of
glyphosate or triclopyr, water, and a non-ionic
surfactant to cover all leaves but not so heavy that it
drips off the leaf surface.
DO NOT CUT; produces stump sprouts and root
suckers
Can pull young saplings in moist soils
Most effective is multiple herbicide applications
during full leaf periods; apply either glyphosate or
triclopyr mixed with water and 0.5% non-ionic
surfactant.
Can be cut at ground level with power or manual
saw; can also be girdled with a hatchet to kill top of
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