Herbicides
169
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Safety - page 25 • First aid - page 33 • Resistance management - page 41
Weed Control in Non-cropland Areas
Weed
Rate a.i. per
acre
Hand held high
volume application
%
solution
Remarks
Annual grasses
and broadleaves
324 - 450
0.67 %
Apply to actively growing weeds. Water volume: 20 - 40 L/acre.
Quackgrass
690 - 1015
1.34%
20 - 120
L/acre of water volume. Add 0.5% v/v of a recommended
surfactant when using water volumes greater than 60 L/acre.
Higher rate for long term control and for heavy infestations.
Canada thistle
(
bud stage)
690 - 1015
1.34 %
20 - 120
L/acre of water volume.
Add 0.5% v/v of a recommended surfactant when using water volumes
greater than 60 L/acre. Higher rate for long term control and for heavy
infestations.
Purple loosestrife
870
0.67 - 1.34%.
Use 22% solution for
wiper application
Other perennials
870 - 1740
1.34 %
Water volume: 40 - 120 L/acre. Add 0.5% v/v of a recommended
surfactant when using water volumes greater than 60 L/acre. Higher
rate for long term control and for heavy infestations.
Brush and trees:
birch, cherry,
poplar, western
snow berry,
willow
435 - 870
0.67 - 1.34 %
Water volume: 40 - 120 L/acre.
Timing: Summer through early fall
Alder, maple,
raspberry,
salmonberry
870
1.34 %
Water volume: 40 - 120 L/acre. Timing: Late summer through early fall.
Turf renovation
360 - 1740
0.67 - 1.34 %
Water volume: 40 - 120 L/acre.
Use higher end of the rate range
for perennials.
Registered Tank Mixes for Non-crop and Industrial Areas - Residual Control
Tank mixture name
Acid equivalent in grams active
ingredient per acre
Remarks
Glyphosate + Simazine
Glyphosate: 360 - 1740 gm/acre
Simizine: 1.61 - 3.63 L
The simazine component of this tank mixture will
provide season long control of most germinating
broadleaf weeds and grasses.
Water volume: 80 - 160 L/acre.
Do not apply to coarse, sandy or gravelly soil.
One application per year.
Additional Application Information
Water Volume: Handgun
(
high water volume): 80 - 120 L/acre.
Boom:
23 - 45
L per acre in most situations;
use of the lower volume may improve control when hard water (Ca or Mg) or iron (Fe) ions are present.
Chemical fallow:
20 - 40
L/acre.
Application Tips
Tillage or mowing prior to application will reduce effectiveness on perennial weeds. Minimum days to wait before
tillage after application: annual weeds: 1 day; spring and fall quackgrass: 3 days; Canada thistle bud stage: 5 days;
fall rosette stage: 7 - 10 days; field bindweed, milkweed and other perennials: 7 days. Best results are obtained when
temperatures are near 20° C and when weeds are actively growing. Control will be reduced if foliage is heavily
covered with dust. Hard water or water containing calcium (Ca), Magnesium (Mg) and iron (Fe) ions will reduce the
activity of glyphosate. Dirty water or water with suspended soil or organic matter will reduce control.
Glyphosate (cont’d)