Combining Herbicides

The purpose of combining herbicides is to exploit the strong properties of each herbicide while minimizing any weaknesses or undesirable properties. By combining herbicides at reduced rates, the grower can increase the spectrum of annual weeds controlled while reducing herbicide carryover. See label concerning the herbicides in use.

Under furrow irrigation, combinations are best applied preplant and incorporated. Some combinations (refer to labels), however, have been registered for application through sprinkler irrigation systems that incorporate them. This method of application is acceptable, provided the herbicides are applied before weeds emerge.

Refer to each label for actual rates and further details concerning herbicide combinations. Component products may have slightly different labels; thus, rates and use directions may vary slightly.

Tank-mixes

Unless specifically prohibited on the label, herbicides registered for use on the same crop may be tank mixed. Unless a tank-mix is recommended on an herbicide label, the grower, applicator, or person making the tank-mix recommendation will be responsible and liable for injury, nonperformance, or other problems associated with the application.

Premixes

There are an abundance of premixes available; listed on the next page are just a few of the many labeled for corn.

A Few Examples of Convenient Premixes Labeled for Corn

Trade Name

Ingredients

Affinity

40% thifensulfuron + 10% tribenuron

Acuron Flexi

0.87% bicyclopyrone + 3.47% mesotrione + 31.24% s-metolachlor

Axiom

54.4% flufenacet + 13.6% metribuzin/lb

Basis

50% rimsulfuron + 25% thifensulfuron/lb

Bicep Lite II Magnum

3.33 lb S-metolachlor + 2.67 lb atrazine/gal

Bicep II Magnum

2.4 lb S-metolachlor + 3.1 lb atrazine/gal gal

Brawl II ATZ

3.1 lb atrazine + 2.4 lb S-metolachlor/gal

Breakfree ATZ

2.25 lb atrazine + 3 lb acetochlor/gal

Breakfree ATZ Lite

1.5 lb atrazine + 4 lb acetochlor/gal

Buctril + Atrazine (Idaho only)

1 lb bromoxynil + 2 lb atrazine/gal

Cadence ATZ

3 lb acetochlor + 2.25 lb atrazine/gal

Cadence Lite ATZ

4 lb acetochlor + 1.5 lb atrazine/gal

Cinch ATZ

3.33 lb S-metolachlor + 2.67 lb atrazine/gal

Cinch ATZ Lite

2.4 lb S-metolachlor + 3.1 lb atrazine/gal

Curtail

0.38 lb clopyralid + 2 lb 2,4-D amine/gal

Guardsman Max

1.7 lb dimethenamid-P + 3.3 lb atrazine/gal

Halex GT

20.50% S-metolachlor + 20.50% glyphosate + 2.05% mesotrione (glyphosate tolerant corn only)

Harness Xtra (ID only)

1.7 lb dimethenamid-P + 3.3 lb atrazine/gal

Harness Xtra 5.6L (ID only)

3.1 lb acetochlor + 2.5 lb atrazine/gal

Keystone (ID, WA only)

3 lb acetochlor + 2.25 lb atrazine/gal

Keystone LA (ID, WA only)

4 lb acetochlor + 1.5 lb atrazine/gal

Lexar

1.74 lb S-metolachlor + 0.224 lb mesotrione + 1.74 lb atrazine/gal

Lumax

2.68 lb S-metolachlor + 1 lb atrazine + 0.268 lb mesotrione/gal

Lumax EZ

2.49 lb S-metolachlor + 0.935 lb atrazine + 0.21% atrazine related compounds + 0.249 mesotrione lb ai/gal

Medal II AT

3.1 lb atrazine + 0.7% atrazine related compounds + 2.4 lb S-metolachlor/gal

NorthStar

7.5% primisulfuron + 43.9% dicamba/lb

Permit PLUS

66.2% halosulfuron + 7.78% thifensulfuron

Realm Q

7.5% rimsulfuron + 31.25% mesotrione

Require Q (mp)

52.94% dicamba + 6.25% rimsulfuron/lb

Resolve Q

18.4 % rimsulfuron + 4% thifensulfuron-methyl/lb

Rifle Plus

1.1 lb dicamba + 2.1 lb atrazine/gal

Sequence

2.25 lb glyphosate + 3 lb S-metolachlor/gal (glyphosate tolerant corn only)

Spirit

14.2% prosulfuron + 42.8% primisulfuron/lb

Stalwart

3.1 lb atrazine + 2.4 lb S-metolachlor /gal

Status

16% diflufenzopyr + 40% dicamba/lb

Steadfast

50% nicosulfuron + 25% rimsulfuron/lb

Stout

67.5% nicosulfuron + 5% thifensulfuron/lb

Tripzin

2.9 lb pendimethalin + 1.1 lb metribuzin/gal

SureStart (ID and OR only)

3.75 lb acetochlor + 0.38 lb clopyralid + 0.12 lb flumetsulam/gal

WideMatch

0.75 lb fluroxypyr + 0.75 lb clopyralid/gal

Yukon

12.5% halosulfuron + 55% dicamba/lb


1 IR/IT; imidazolinone resistant or tolerant varieties