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Safety - page 25 • First aid - page 33 • Resistance management - page 41
Herbicides
Tank mix partner
Poast Ultra + tank mix partner rate
Additional weeds controlled
Muster
Poast Ultra: 0.13 - 0.19 + Merge: 0.75 - 1.0 % V/V + Muster
8 - 12
g/acre
Poast Ultra susceptible grassy weeds plus
flixweed, hemp-nettle, redroot pig weed
stinkweed, wild mustard.
Muster + Lontrel 360
Poast Ultra: 0.13 - 0.19 + Merge: 0.4 L/acre +Muster 8
8
g/acre + Lontrel 360: 0.17 L/acre
Poast Ultra susceptible grassy weeds plus
Canada thistle plus above weeds.
Liberty Link canola
Liberty 150 SN
Poast Ultra: 0.09 L/acre + Merge: 0.4 L/acre +
Liberty 150 SN: 1.08 L/acre
Poast Ultra susceptible grassy weeds plus
Liberty susceptible weeds.
Flax
Buctril M
Poast Ultra: 0.13 - 0.19 + Merge: 0.75 - 1.0 % V/V +
Buctril M: 0.4 L/acre
Poast Ultra susceptible grassy weeds plus
Bromoxynil susceptible weeds.
Logic M
Poast Ultra: 0.13 - 0.19 + Merge: 0.75 - 1.0 % V/V +
Logic M:`0.5 L/acre
MCPA ester
Poast Ultra: 0.13 - 0.19 + Merge: 0.75 - 1.0 % V/V +
MCPA ester 500:` up to 0.45 L/acre
Lontrel 360
Poast Ultra: 0.13 - 0.19 + Merge: 0.75 - 1.0 % V/V +
Lontrel 360: 0.23 - 0.34 L/acre
Poast Ultra susceptible grassy weeds plus
Canada thistle.
Lontrel 360 + MCPA
Poast Ultra: 0.13 - 0.19 + Merge: 0.75 - 1.0 % V/V +
Lontrel 360: 0.23 - 0.34 L/acre + MCPA ester 500:
0.34 - 0.45
L/acre
Poast Ultra susceptible grassy weeds
plus Canada thistle and MCPA susceptible
weeds.
Field peas
Pursuit
Poast Ultra: 0.19 L/acre + Merge: 0.4 L/acre + Pursuit:
40
mL/acre
Chickweed, stinkweed, cleavers, hemp-
nettle, volunteer canola (non-CLEARFIELD),
redroot pigweed, wild buckwheat,
smartweed, wild mustard.
Application Information
With
:
Apply with ground equipment or by air.
Water volume
:
Ground: 20 - 45 L/acre. Dense foliage, heavy infestations and for quackgrass control: 45 - 80 L/acre.
Air: 10 - 20 L/acre.
Application Tips
For optimum control of grassy weeds, when grasses are actively growing, there is good soil moisture and crop is
small enough to permit thorough spray coverage. Grasses growing in less than ideal conditions are more difficult
to control. Do not spray Poast Ultra if temperatures of +5°C or lower are forecasted within 3 days of application.
Temperatures near freezing (below 5ºC) will prevent optimum herbicide performance, as weeds are not actively
growing. Escapes or re-tillering may occur under prolonged stress conditions or low fertility. Do not apply on grasses
stressed longer than 20 days due to lack of moisture as unsatisfactory control can result.
Quackgrass Control
:
Apply when quackgrass is actively growing up to the 3 leaf stage (8 to 12 cm in height).
Cultivation is necessary prior to spraying to stimulate even quackgrass growth and to obtain control. Where poor soil
fertility (i.e., low nitrogen) exists, quackgrass control may not be satisfactory.
How it Works
Poast Ultra is a contact and a systemic herbicide. Absorbed primarily by foliage and translocated to the growing
points. Inhibits formation of fatty acids in these tissues. Thorough coverage of the foliage is important for consistent
grass control.
Expected Results
Susceptible grasses stop growing immediately, gradually turn yellow and then brown. The time required for complete
control is normally 7 - 21 days (annual grasses). Control of quackgrass develops more slowly than control of annual
grasses. Poast Ultra is translocated through the quackgrass plant to the rhizomes and kills actively growing rhizome
buds, as well as above ground vegetation. Dormant rhizome buds will remain unaffected by the spray and regrowth
can occur from these buds. The regrowth will not be significant until 6 - 8 weeks after treatment, depending on
growing conditions, crop cultivation practices and crop competition.
Poast Ultra (cont’d)