ISSUE 3   May 24, 2007

Selected Grass Herbicides for Wheat and Barley - Quick Reference Guide (May, 2007)

 

Axial

Discover

Everest

Puma

Rimfire

Crop

Winter and HRS wheat, barley

Wheat

Wheat

Wheat and barley

Wheat

Crop stage

2-leaf to boot

2-leaf until prior to boot

emergence to prior to jointing

Wheat: emergence to 60 days before harvest.
Barley: 1-4 leaf

1-leaf to flag leaf emergence

Grass weed stage

1-6 leaf + 3 tillers

1-5 leaf foxtail and 1-6 leaf wild oat

up to 4 leaves

1 leaf to 2 tiller

1 leaf to 2 tiller

Mode of Action

ACCase Inhibitor

ACCase Inhibitor

ALS inhibitor

ACCase Inhibitor

ALS inhibitor

Application rate/A

8.2 fl oz

3.2 and 4 fl oz; NG 12.8 and 16 fl oz

0.3-0.6 oz

0.33-0.66 pt

1.75-2.25 oz

Cost ($/A)

12.75

12.50-16.25

10.50-15.50

7.75-16

8.25-10.75

Adjuvant

Adigor 9.6 fl oz/A (co-pack)

DSV (co-pack); MSO 0.25% may be added

NIS 0.25% or basic pH blend 1% if no EC or ester broadleaf herbicides

mefenpyr safener (prepackaged)

MSO 1.5 pt/A, or NIS 0.5% + UAN 1-2 qt/A, or basic pH blend 1%

Residual for weed control

No

No

Yes

No

Yes

GPA ground

5 - 10

5 - 10

5 - 10

5-10

10-15

GPA Air

5

3 - 5

3 - 5

5

5

Rainfast (hours)

0.5

0.5

1

1

4

PHI (days)

60

60

60

wheat - 60
barley - 57

71

Crop rotation restrictions beyond next crop season (months after application)

No

No

oat - 18; chickpea and lentil - 24

No

corn, CRP grass, potato and sugarbeet - 12

Grass weed control

(E=90-99%, G=80-90%, F=65-80%, P= 40-65% control)

Wild Oat

E1

E1

G-E2

E1

G-E

Green foxtail

E1

E1

E

E1

P-F

Yellow foxtail

G-E1

G-E1

P-G

E1

P-F

Barnyardgrass

G-E

E

F-G

E

G

Downy Brome

None

None

P-F

None

P-F

Japanese Brome

None

None

G

None

G

Persian Darnel

E

G-E

F-G

NA

F-G

Foxtail Barley

None

None

F

None

F-G

Quackgrass

None

NA

P-F

None

F

Selected annual broadleaf weed control

No

No

Yes

No

Yes

Tank mixtures

see labels

1Except ACCase resistant plants.
2
Except ALS resistant plants.

Greg Endres
Area Extension Specialist/Cropping Systems
NDSU Carrington Research Extension Center
gregory.endres@ndsu.edu

Rich Zollinger
NDSU Extension Weed Specialist
R.Zollinger@ndsu.edu


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