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Components and Ratios of Pre-mix Herbicides for Use in Corn and Grain Sorghum

Many herbicide options for field corn and grain sorghum comprise multiple herbicide active ingredients to broaden the spectrum of weed species the product will control. Herbicides are also combined to include additional herbicide modes of action so that development of herbicide-resistant weeds can be prevented or delayed. Knowing the amount of the individual herbicides in the pre-mix is useful for deciding if additional product should be applied to further improve weed control.

 

The following table lists several pre-mix herbicides that are labeled for use in field corn and grain sorghum and the equivalent rates of the individual herbicide components. Use rates for pre-mix herbicides are based on label recommendations for medium texture soils with 1.5% organic matter and pH of 6.5. Use rates can vary depending on crop, soil characteristics, and planned follow-up herbicide applications. Before using any herbicide, always consult the label for appropriate rates, application timing, tank-mix partners, plant-back intervals, geographic restrictions, and other special instructions.

 

Table 1. Pre-mix Herbicides for use in field corn and grain sorghum and the equivalent rates of individual herbicide components.

Pre-mix herbicide (manufacturer) Use rate per acre Component herbicides Equivalent rates (per acre) Herbicide Mode of Action Labeled for use ina: Field corn Labeled for use ina: Grain sorghum
Basis (DuPont) 0.5 oz
Resolve SG
 
Harmony 50 SG
1 oz
 
0.25 oz
ALS inhibitor
ALS inhibitor
x  
Bicep II MagnumR (Syngenta) 2.1 qt
atrazine
 
Dual II Magnum/Cinch
1.6 lb ai
 
1.33 pt
PS II inhibitor
Shoot inhibitor
 x  x
Cinch ATZR (DuPont) 2.1 qt
atrazine
 
Dual II Magnum/Cinch
 1.6 lb ai
 
1.33 pt
PS II inhibitor
Shoot inhibitor
 x  x
Bicep Lite II MagnumR (Syngenta) 1.5 qt
atrazine
 
Dual II Magnum/Cinch
1.6 lb ai

 

1.33 pt
PS II inhibitor
 
Shoot inhibitor
 x  x
Cinch ATZ LiteR (DuPont) 1.5 qt
atrazine
 
Dual II Magnum/Cinch
1.6 lb ai
 
1.33 pt
PS II inhibitor
Shoot inhibitor
 x  x
Callisto XtraR (Syngenta) 24 fl oz
atrazine
 
Dual II Magnum/Cinch
1.0 lb ai
 
1.33 pt
PS II inhibitor
Shoot inhibitor
 x  
Camix (Syngenta) 2.0 qt
Callisto
 
atrazine
0.3 fl oz
 
0.6 lb ai
Pigment inhibitor
PS II inhibitor
 x  
Capreno (Bayer) 3.0 fl oz
Dual II Magnum
 
Callisto
1.76 pt
 
5.36 fl oz
Shoot inhibitor
Pigment inhibitor
 x  
CorvusR (Bayer) 5.6 fl oz
Laudis
 
thiencarbazone-methyl
2.47 fl oz
 
0.013 lb ai
Pigment inhibitor
ALS inhibitor
 x  
Degree Xtra (Monsanto) 3.0 qt
Degree
 
atrazine
4.3 pt
 
1.0 lb ai
Shoot inhibitor
PS II inhibitor
 x  x
ExpertR (Syngenta) 3.0 qt
atrazine
 
Dual II Magnum
 
glyphosate
1.6 lb ai
 
1.37 pt
 
32 fl oz (3 lb ae/gal)
PS II inhibitor
Shoot inhibitor
glyphosate
 x  x (PRE only)
G-Max LiteR (BASF) 2.7 pt
Outlook
 
atrazine
16 fl oz
 
0.9 lb ai
Shoot inhibitor
PS II inhibitor
 x  x
Guardsman MaxR (BASF) 3.5 pt
Outlook
 
atrazine
16 fl oz
 
1.45 lb ai
Shoot inhibitor
PS II inhibitor
 x  x
Halex GT (Syngenta) 3.6 pt
Dual Magnum
 
glyphosate
 
 
Callisto
1 pt
 
39.7 fl oz (3 lb ae/gal)
3 fl oz
Shoot inhibitor
glyphosate
 
 
Pigment inhibitor
 x  
Harness XtraR (Monsanto) 2.0 qt
Harness
 
atrazine
1.8 pt
 
1.25 lb ai
Shoot inhibitor
PS II inhibitor
 x  
Hornet (Dow) 3 oz
Python
 
Stinger
0.7 oz
 
4 fl oz
ALS inhibitor
Growth regulator
 x  
LumaxR (Syngenta) 2.5 qt
Dual II Magnum
 
atrazine
 
Callisto
1.75 pt
 
0.63 lb ai
 
5.36 fl oz
Shoot inhibitor
PS II inhibitor
Pigment inhibitor
 x  x
LexarR (Syngenta) 3.0 qt
Dual II Magnum
 
atrazine
 
Callisto
1.36 pt
 
1.3 lb ai
 
5.34 fl oz
Shoot inhibitor
PS II inhibitor
Pigment inhibitor
x  x
Parallel PlusR (MANA) 2.29 qt
atrazine
 
Parallel
1.6 lb ai
 
1.6 pt
PS II inhibitor
Shoot inhibitor
x  x
PrequelR (DuPont) 1.66 oz
Resolve SG
 
Balance Pro
1 oz
 
1 fl oz
ALS inhibitor
Pigment inhibitor
 x  
Realm Q (DuPont) 4 oz
Resolve SG
 
Callisto
1.2 oz
 
2.5 fl oz
Shoot inhibitor
PS II inhibitor
 x  
Require Q (DuPont) 4 oz
Resolve SG
 
dicamba
1 oz
 
3.8 fl oz (4 lb ai/gal)
ALS inhibitor
Growth regulator
 x  
Resolve Q (DuPont) 1.25 oz
Resolve SG
 
Harmony 50 SG
0.9 oz
 
0.1 oz
ALS inhibitor
ALS inhibitor
 x  
Sequence (Syngenta) 2.5 pt
glyphosate
 
 
Dual Magnum
30 fl oz (3 lb ae/gal)
0.98 pt
glyphosate
 
 
Shoot inhibitor
 x  x (PRE only)
Steadfast Q (DuPont) 1.5 oz
Accent
 
Resolve SG
0.26 oz
 
0.28 oz
ALS inhibitor
ALS inhibitor
 x  
SureStart (Dow) 1.75 pt
Surpass
 
Python
 
Stinger
1.03 pt
 
0.52 oz
 
2.7 fl oz
Shoot inhibitor
ALS inhibitor
Growth regulator
 x  
TripleFLEX (Monsanto) 1.75 pt
Surpass
 
Python
 
Stinger
1.03 pt
 
0.52 oz
 
2.7 fl oz
Shoot inhibitor
ALS inhibitor
Growth regulator
 x  
Verdict (BASF) 13 fl oz
Sharpen
 
Outlook
2.6 fl oz
 
10.8 fl oz
PPO inhibitor
Shoot inhibitor
 x  x
Yukon (Gowan) 4 oz
Permit
 
dicamba
0.67 oz
 
4 fl oz (4 lb ai/gal)
ALS inhibitor
Growth regulator
 x  x

 

a Check product label for appropriate application timing.
R Restricted use pesticide.

 

Abbreviations:

oz = ounce 
fl oz = fluid ounce 
gal = gallon 
pt = pint 
qt = quart 
lb = pound

ai = active ingredient

ae = acid equivalent

DF = dry flowable

L = liquid

SG = soluble granule

 

Additional resources

For more information on herbicide modes of action, please see OSU Extension Fact Sheet PSS-2778 “Understanding Herbicide Mode of Action.”

 

Joe Armstrong
Extension Weed Science Specialist

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