Herbicide Control Treatments for Invasive Trees and Shrubs
Max Williamson
Nonnative Plants
Promote
Crop,
Naturalized
Ornamental,
Wildlife Food
Soil Stabilizer
Control
Invasive
Noxious
Pest Plant
Treatment Options
Foliar
Basal
Cut Surface
Dormant Stem
Soil Applied
Invasive Trees
• Tallowtree, Popcorntree
Triadica sebifera
(Sapium sebiferum)
TALLOWTREE or POPCORNTREE is deciduous,
growing to about 50 feet and has heart shaped leaves.
Recommended Control Procedures:
Large Trees
Stem injections Arsenal AC*, Garlon 3A, or Pathfinder II
anytime except March and April
Cut stumps -apply the herbicides immediately after cutting
(Ortho Brush-B-Gone and Enforcer Brush Killer)
Extensive infestations apply Velpar L .
Saplings
Apply Garlon 4 as 20% basal spray
Seedlings and Saplings
Foliar spray Arsenal AC* at 1 percent, Krenite S 30
percent, or Garlon 4 at 2 percent
*Nontarget
plants may be killed or injured by root uptake
Invasive Trees
• Tallowtree, Popcorntree
Triadica sebifera
(Sapium sebiferum)
• Silktree, Mimosa
Albizia julibrissin
• SILKTREE, MIMOSA is a deciduous legume, growing 10
to 50 feet with feathery leaves
• Recommended Control Procedures:
• Large Trees
• Stem injections- Arsenal AC* or Garlon 3A, anytime
except March and April
• Cut Stumps-apply the herbicides immediately after cutting
• Saplings
• Apply Garlon 4 as 20% basal spray
• Resprouts and Seedlings
• July to October-Garlon 3A, Garlon 4, or Glyphosate as 2
% foliar spray
• July to September-Transline as 0.2 to 0.4 % foliar spray
*Nontarget
plants may be killed or injured by root uptake
Invasive Trees
• Tallowtree, Popcorntree
Triadica sebifera
(Sapium sebiferum)
• Silktree, Mimosa
Albizia julibrissin
• Princesstree,
Royal Paulownia
Paulownia tomentosa
• PRINCESS TREE, ROYAL PAULOWNIA is
deciduous, growing to 60 feet with large-heart
shaped leaves and pecan-like seed clusters
• Recommended Control Procedures:
• Large Trees
• Stem injections- Arsenal AC* or Glyphosate,
anytime except March and April
• Cut Stumps-apply the herbicides immediately
after cutting
• Saplings
• Apply Garlon 4 as 20% basal spray
• Resprouts and Seedlings
• July to October-Arsenal AC* 1 percent;
Glyphosate, Garlon 3A, or Garlon 4 as 2 %
foliar spray
*Nontarget
plants may be killed or injured by root uptake
Invasive Trees
• Tallowtree, Popcorntree
Triadica sebifera
(Sapium sebiferum)
• Silktree, Mimosa
Albizia julibrissin
• Princesstree,
Royal Paulownia
Paulownia tomentosa
• Tree-of-heaven or
Ailanthus
Ailanthus altissima
TREE-OF-HEAVEN, AILANTHUS is deciduous,
growing to about 80 feet and has long pinnately compound
leaves.
Recommended Control Procedures:
Large Trees
Stem injections Garlon 3A, Pathway*, Pathfinder II, or
Arsenal AC* (midsummer best, late winter somewhat less
effective)
Cut stumps Apply the herbicides immediately after cutting
Saplings
Apply Garlon 4 as 20% basal application
Seedlings and Saplings
Foliar spray Arsenal AC* 1 percent, Krenite S 30 percent,
Garlon 4 at 2 percent
*Nontarget
plants may be killed or injured by root uptake
Invasive Trees
• Tallowtree, Popcorntree
Triadica sebifera
(Sapium sebiferum)
• Silktree, Mimosa
Albizia julibrissin
• Princesstree,
Royal Paulownia
Paulownia tomentosa
• Tree-of-heaven or
Ailanthus
Ailanthus altissima
• Chinaberrytree
Melia azedarach
• CHINABERRYTREE is deciduous, growing to 50 feet
with lacy, many-divided dark green leaves
• Recommended Control Procedures:
• Large Trees
• Stem injections- Arsenal AC*, Pathway*, Pathfinder II, or
Garlon 3A anytime except March and April
• Cut Stumps-apply the herbicides immediately after cutting
• Saplings
• Apply Garlon 4 as 20% basal spray
• Resprouts and Seedlings
Foliar spray Garlon 3A, or Garlon 4 as 2 % foliar spray;
Arsenal AC* at 1 percent. (July to October)
*Nontarget
plants may be killed or injured by root uptake
Invasive trees
Russian Olive
(Elaeagnus angustifolia)
• RUSSIAN OLIVE a small thorny tree to 35 feet
microscopic silvery scales covered leaves
• Recommended Control Procedures:
• Large Trees
• Stem injections- Arsenal AC* or Garlon 3A, anytime
except March and April
• Cut Stumps-apply the herbicides immediately after cutting
• Saplings
• Apply Garlon 4 as 20% basal spray
• Resprouts and Seedlings
• Foliar spray Arsenal AC* at 1 percent; Glyphosate, Garlon
3A, or Garlon 4 at 2 percent. (July to October)
*Nontarget
plants may be killed or injured by root uptake
Invasive Shrubs
• Chinese & European Privet
Ligustrum sinense & L. vulgare
• CHINESE PRIVET, EUROPEAN PRIVET is
semi-evergreen, bushy shrub to 30 feet
Recommended Control Procedures
• Foliar spray wetting all leaves with Glyphosate at 3percent or Arsenal AC* at 1-percent. (April to
December)
• Stems too tall for foliar spray
• Apply Garlon 4 as basal spray
•
Cut stems and stumps treat with Arsenal AC*
or Velpar L* at 10 percent.
For safety to surrounding vegetation treat cutsurfaces with Garlon 3A or Glyphosate at 20-percent
*Nontarget plants may be killed or injured by root uptake
Invasive Shrubs
• Chinese & European Privet
Ligustrum sinense & L. vulgare
• Bush Honeysuckles
Amur (Lonicera maakii)
Morrow (L. morrowii)
Tartarian (L. tartarica)
Winter (L. frangrantissima)
Winter
Morrow
Amur
Amur
Tartarian
• BUSH HONEYSUCKLE is deciduous, branched,
multiple stemmed, with dark-green oval –to-oblong
leaves
• Recommended Control Procedures
• Foliar spray wetting all leaves with Glyphosate at
2-percent (April to November)
• Stems too tall for foliar spray
• Apply Garlon 4 as basal spray
• Cut stems and stumps treat with Arsenal AC*
at 10 percent, or Glyphosate at 20 percent.
*Nontarget plants may be killed or injured by root uptake
Invasive Shrubs
• Chinese & European Privet
Ligustrum sinense & L. vulgare
• Bush Honeysuckles
Lonicera spp.
• Invasive Roses
Multiflora rose (Rosa multiflora)
Macartney rose (R. bracteata)
Cherokee rose (R. laevigata)
• NONNATIVE ROSES are deciduous except for
Cherokee
• Recommended Control Procedures
• Foliar spray wetting all leaves with• Escort at 0.2 dry ounces per 3-gallon (April to
June)
• Arsenal AC* at 1-percent or Escort at the above
rate (August to October)
• Glyphosate, repeated applications, at 2 percent
(May to October)
• Stems too tall for foliar spray
• Apply Garlon 4 as basal spray (Jan to Feb or
May to Oct)
• Cut stems and stumps treat with Arsenal AC*
at 10 percent, Glyphosate at 20-percent
*Nontarget
plants may be killed or injured by root uptake
Invasive Shrubs
• Chinese & European Privet
Ligustrum sinense & L. vulgare
• Bush Honeysuckles
Lonicera spp.
• Invasive Roses
Rosa spp.
• Autumn Olive
Elaeagnus umbellata
• AUTUMN OLIVE is a tardily deciduous brushy shrub, 3
to 16 feet 12 feet
• Recommended Control Procedures
• Foliar spray wetting all leaves with Arsenal AC* or
Vanquish* at 1-percent. (April to October)
• Stems too tall for foliar spray
• Apply Garlon 4 as basal spray ( Jan to Feb or May to
Oct)
• Cut stems and stumps treat with Arsenal AC* at 10
percent or Glyphosate at 20 percent
*Nontarget
plants may be killed or injured by root uptake
Invasive Shrubs
• Chinese & European Privet
Ligustrum sinense & L. vulgare
• Bush Honeysuckles
Lonicera spp.
• Invasive Roses
Rosa spp.
• Autumn Olive
Elaeagnus umbellata
• Silverthorn or Thorny Olive
Elaeagnus pungens
• SILVERTHORN, THORNY OLIVE is an evergreen,
densely brushy shrub 3 to 25 feet
• Recommended Control Procedures
• Foliar spray wetting all leaves with Arsenal AC* or
Vanquish* at 1-percent. (April to October)
• Stems too tall for foliar spray
• Apply Garlon 4 as basal spray (Jan to Feb or May to
Oct)
• Cut stems and stumps treat with Arsenal AC* at 10
percent or Glyphosate at 20 percent
*Nontarget
plants may be killed or injured by root uptake
Invasive Shrubs
• Chinese & European Privet
Ligustrum sinense & L. vulgare
• Bush Honeysuckles
Lonicera spp.
• Invasive Roses
Rosa spp.
• Autumn Olive
Elaeagnus umbellata
• Silverthorn or Thorny Olive
Elaeagnus pungens
• Japanese Privet
Ligustrum japonicum
• JAPANESE PRIVET is an evergreen to 35 feet, with an
upward spreading canopy
• Recommended Control Procedures
• Foliar spray wetting all leaves with Arsenal AC* at 1
percent or Garlon 4 at 3 percent (August—
September). Glyphosate at 3 percent (March to June)
• Stems too tall for foliar spray
• Apply Garlon 4 as basal spray (Jan to Feb or May to
October)
• Cut stems and stumps treat with Arsenal AC* or
Velpar L* at 10 percent
For safety to surrounding vegetation treat cutsurfaces with Garlon 3A or Glyphosate at 20-percent
*Nontarget plants may be killed or injured by root uptake
Invasive shrubs
• Winged Burning Bush
• Euonymus alata
• WINGED BURNING BUSH is a deciduous, multiple
wing-stemmed, brushy shrub to 12 feet
• Recommended Control Procedures
• Foliar spray wetting all leaves with Arsenal AC* or
Vanquish* at 1-percent. (April to October)
• Stems too tall for foliar spray
• Apply Garlon 4 as basal spray (Jan to Feb or May to
Oct)
• Cut stems and stumps treat with Arsenal AC* at 10
percent or Glyphosate at 20 percent
*Nontarget
plants may be killed or injured by root uptake
Invasive shrubs
• Sacred Bamboo, NANDINA
• Nandina domestica
• SACRED BAMBOO or NANDINA is an evergreen
multi-stemmed erect shrub reaching 8 feet
• Recommended Control Procedures
• Foliar spray wetting all leaves with Glyphosate at
1-percent (August to October)
• Stems too tall for foliar spray
• Apply Garlon 4 as basal spray
• Cut stems and stumps treat with Arsenal AC*
at 10 percent, or Glyphosate at 20 percent.
*Nontarget plants may be killed or injured by root uptake
Invasive Plant Management Programs
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•
•
•
•
•
Prevention
Detection and Monitoring
Control and Containment
Restoration
Research
Education and Extension
Integrated Vegetation Management
Methods for Invasive Plants
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•
•
•
•
Prescribed Burning
Mechanical
Manual and Motor-Manual
Biological Control
Herbicides
Control a little now
or
Control a bunch later
The End!!
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Herbicide Control Treatments for Invasive Trees and