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Herbicides
Other Perennial Weed Control in Summerfallow, Shelterbelts and Post-harvest
Weeds controlled
Weed stage
Rate a.i. per acre
Remarks
Common milkweed
Bud to full bloom 1765
Allow 7 or more days after treatment before tillage. Reduced
control may occur after full bloom. Milkweed may not all be in
the correct stage, therefore, repeat treatments may be required
Field bindweed
Full bloom or
beyond
1000 -1728
Allow 7 or more days after treatment before tillage.
Foxtail barley
Seedling to
heading
360-720
Allow a minimum of 1 day after treatment before tillage or
seeding. Use higher rates for larger, more established plants,
heavy infestations or if plants
are stressed.
Toadflax
rosette stage
(
summerfallow)
Rosettes at least
15
cm tall or
across.
360
Allow 7 or more days after treatment before tillage in
summerfallow.
Alfalfa
Early bud to full
bloom stage. Fall
applications only.
540 -720
Allow 5 or more days after treatment before tillage. Use the
higher rates when alfalfa populations are high or when heavy
grass infestations are
also present.
Pre-harvest Perennial Weed Control
Crop:
Wheat, barley (including malting barley*), oats*, canola (rapeseed), dry beans, flax (including solin),
lentils, mustard (Weathermax only), peas, soybeans and forages.
Weeds Controlled:
Quackgrass, Canada thistle, common milkweed, toadflax, dandelion, perennial sow-thistle (season long)
Rate
Crops
Wheat, barley (including malting barley*), oats*, canola
(
rapeseed), dry beans, flax (including solin), lentils, peas,
soybeans
Forages
360
g a.i./acre
360-720
Caution:
Do not apply to any crops if grown for seed.
*
Barley grown for malt and tame oat grown for milling are registered for the pre-harvest application. However, growers should contact malt barley and
milling oat buyers prior to application to confirm acceptance of glyphosate treated grain
**
These crops are registered with R/T 540, Roundup Transorb HC, Roundup WeatherMax and Roundup Ultra 2 only under
User Requested Minor
Use Label Expansion program.
The manufacturer assumes no responsibility with respect to performance and/or crop tolerance claims for herbicide
performance.
How to Apply
Ground (all products). Aerial:
Do not apply by air, except Glyfos, Shooter Plus, Factor 540, Roundup
Transorb HC, Roundup WeatherMax, Roundup Ultra 2, RT/540, ClearOut 41Plus, MPower Glyphosate.
Crop Staging:
Apply when average seed moisture is at or below 30%. Accurate measurement of seed moisture must
be made before application. The following chart lists visual symptoms that can be used as guidelines as to when 30%
grain moisture has been reached.
Crop*
Percent seed
moisture
Visual symptoms
Wheat, barley, oat
Less than 30
Hard dough stage - a thumbnail impression remains on seed.
Canola (including
glyphosate tolerant
varieties)
Pods are green to yellow; most seeds are yellow to brown.
Flax (including low-linoleic
acid varieties)
Majority (75%-80%) of bolls are brown.
Glyphosate (cont’d)