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Infinity - Powerful Broadleaf Weed Control



Light 'em Up

Resistant or not, powerful Infinity® herbicide provides you with the ability to take out the toughest broadleaf weeds in your cereals. With its unique Group 27 mode of action, Infinity helps ensure the profitability of your farm today and for years to come.

Managing herbicide resistance is everyone’s fight.

Please spray responsibly.

Product Summary


Product Type

  • Herbicide




  • Broadleaf
Weeds Surpressed

Weeds Controlled (Top 6)

  • Cleavers
  • Kochia
  • Canada Fleabane
Groups and Active Ingredients

Groups and Active Ingredients

  • Pyrasulfotole Group 27
  • Bromoxynil Group 6
Formulation Type

Formulation Type

  • Liquid-Emulsifiable Concentrate


  • 6.7 L Jug (20 ac)
  • 107.2 L Bulk Shuttle (320 ac)
  • 335 L Bulk Tote (1,000 ac)

Key Product Points

  • An exceptional resistance management tool with the ability to take out the toughest broadleaf weeds.
  • Ensure profitability of your field for years to come with the unique Group 27 mode of action.
BENEFIT Infinity Infinity FX
Exceptional broadleaf weed control check check
Outstanding resistance management with Group 27 chemistry check check
Cleavers control 1 to 6 whorls 1 to 9 whorls
Kochia control Up to 10 cm in height Up to 15 cm in height

The Infinity Advantage

  • Infinity, powered by Group 27 pyrasulfotole and Group 6 bromoxynil, is a key resistance management tool with fast acting contact and systemic activity on the toughest weeds
  • Controls the widest range of the toughest broadleaf weeds, including kochia, buckwheat and cleavers
  • Tank-mix friendly Infinity is the preferred tank-mix partner with all major graminicides including: Puma® Advance, Axial®, Horizon® and Liquid Achieve®
  • Wide window of application
  • Registered for both ground and aerial application

Speed of Activity: Infinity VS. Competitors

Active Ingredients

Pyrasulfotole – Group 27
Bromoxynil – Group 6


Perennial Ryegrass
Red Fescue
Wheat, durum
Wheat, spring
Wheat, winter

Weeds Controlled

Annual sow thistle
Common ragweed
Pale smartweed
Redroot pigweed
Russian thistle
Shepherd's purse
Volunteer canola
Volunteer soybean
Wild buckwheat
Wild mustard

Weeds Suppressed

Canada Fleabane
Canada thistle
Giant Ragweed
Narrow-leaved hawk's beard
Perennial sow thistle
Round-leaved mallow
Spreading atriplex
Stork’s bill

Province of Registration

British Columbia
New Brunswick
Nova Scotia
Prince Edward Island

Registered Tank Mixes

  • AMS
  • Axial®
  • Axial + Tilt®
  • Decis®
  • Horizon®
  • Liquid Achieve®
  • Lontrel™
  • MCPA Ester
  • Puma Advance
  • Puma Advance + Tilt®
  • Sevin® XLR
  • Tilt
  • Traxos®
  • Traxos + Tilt
  • Varro™
  • 2,4-D Ester

jug icon

Get the Max from your Tank Mix

Our tank mix tool can help you find the best tank mix partner for the Bayer herbicide you’re using.
Tank Mix Tool


Infinity Top-ups for Tough to Control Weeds

Rate: 0.5 L/ac.
Result: Control of cleavers that are 4-6 whorls. Increased activity on kochia, Canada thistle and dandelion.

MCPA Ester*
Rate: 4 active oz./ac.
Result: Increased suppression of Canada thistle

2,4-D Ester*
Rate: 4 active oz./ac.
Result: Increased activity on stork’s-bill and spring germinated narrow-leaved hawk’s beard

*Precautions: Mixing with a graminicide could have negative implications on wild oat control in heavy populations

As shown below when you tank mix with Infinity you don’t negatively affect your grassy weed control.

% Control of wild oats in cereal crops
 Horizon   Horizon + Infinity   Horizon + Frontline™ 
95.5 95.5 89.5

Source: 8 trials and 12 trials, 2005-2006 internal Bayer research trials.

Infinity vs The Competition

Infinity Leaves The Competition Behind

% Efficacy
Infinity Buctril® M Frontline™ Refine® SG Thumper® Attain®
97 91 92 96 92 90
97 94 96 68 97 96
Kochia 90 80 55 56 83 89
93 90 89 91 91 86
96 90 79 93 93 92
sow thistle
96 91 94 50 96 98
Cleavers 93 52 93 72 52 92

Source: 112 Trials - 2004-2006 (INTERNAL AND EXTERNAL) NOTE: AMS added to enhance cleaver control.

Application Guidelines

Application Tips

0.335 L/ac.


Crops may be treated from the 1 leaf stage of growth until the flag leaf is just visible but still rolled


  • One 6.7 L jug = 20 acres (one 2 x 6.7 L case = 40 acres)
  • 107.2 L Bulk shuttle = 320 acres
  • 335 L Bulk tote = 1,000 acres


Water Volume
  • Ground – minimum of 5 US gal./ac. (19 L/ac.)
  • Aerial – minimum of 3 US gal./ac. (11 L/ac.)


  • One hour after application


Mixing Order
  • If adding AMS, always add AMS to the tank first
  • Infinity first, followed by tank-mix partner


Residue and Grazing

Do not:

  • graze treated perennial ryegrass, red fescue or bromegrass crops within 7 days of application or harvest for hay within 30 days of application
  • harvest wheat for grain or straw within 50 days of application
  • harvest barley for grain or straw within 45 days of application


Re-cropping Intervals
  • Alfalfa, barley, canary seed, canola, corn (field)1, flax, oats, peas (field)2, potatoes, soybeans1, sunflowers and wheat can be planted 10 months following an application of Infinity
  • Lentils can be planted 22 months following an application of Infinity
1 Manitoba only
2 Field peas may be grown the year following Infinity herbicide application in all black, grey-wooded and dark brown soil zones. Do not plant field peas the year following an Infinity application in the brown soil zone where organic matter content is below 2.5% and soil pH is above 7.5


Crop Safety
infinity crop image

Infinity includes a Bayer proprietary safener which works by accelerating the metabolism of the herbicide in the crop, but not in susceptible weed species. In field tests throughout North America at hundreds of locations, this technology has demonstrated exceptional crop safety on all tested varieties of wheat, durum and barley.



Infinity FAQs

What is Infinity®?

Infinity is a powerful herbicide that takes out the toughest broadleaf weeds in your cereals. With its unique Group 27 mode of action, Infinity helps ensure the profitability of your farm today and for years to come.

What crops are safe to apply Infinity on?

Infinity is registered for applications in wheat (durum, spring and winter wheat), barley, timothy (seed production only), triticale, perennial ryegrass (seedling and established grown for seed or forage), red fescue and bromegrass (established, grown for seed or forage).

What makes Infinity different?

Infinity has a unique mode of action, Group 27, which at the time of registration (2008) was the first new broadleaf mode of action available to cereal growers in 20 years.

What active ingredients are in Infinity?

Infinity contains two active ingredients and two modes of action:
  1. Pyrasulfotole (Group 27) 
  2. Bromoxynil (Group 6)

What wild oat products can I tank mix Infinity with?

Infinity is a preferred tank-mix partner and is registered to be mixed with Puma Advance®, Varro™, Axial®, Horizon® and Liquid Achieve®. For a complete list of unlabelled tank mixes supported by Bayer please visit: Tank Mix List

What broadleaf weeds will Infinity control?

Infinity controls/suppresses all the weeds listed below PLUS all their resistant biotypes:
Annual sow thistle, chickweed, cleavers, common ragweed, flixweed, hemp-nettle, kochia, lamb's-quarters, pale smartweed, redroot pigweed, Russian thistle, shepherd’s-purse, stinkweed, volunteer canola (including conventional, Round-up Ready, LibertyLink® and Clearfield®), wild buckwheat, wild mustard and suppression of Canada thistle, dandelion, perennial sow thistle, and round-leaved mallow. The Infinity label calls for Ammonium Sulphate (AMS) to be added for enhanced cleavers control.

When do I need to add AMS?

Bayer recommends adding AMS Utility Modifier with Infinity for control of cleavers that are in the 4 to 6 whorl stage. The use of AMS with Infinity also improves control of larger kochia and suppression of Canada thistle and dandelion.

How much Bayer AMS Utility Modifier should I add to Infinity?

Bayer AMS Utility Modifier has a concentration of 400 g/L (40% solution) and a label rate of 500 g/ha, therefore AMS should be added at a rate of 0.5 L per acre (20 acres per jug). Add one 10 L jug of AMS for every 6.7 L jug of Infinity.

What is the tank mix order with AMS and other products?

Always add AMS Utility Modifier to the spray tank first, prior to adding any other pesticides.

Are any other products registered for use with Infinity as substitutes for Bayer AMS Utility Modifier?

Only products that are spray grade ammonium sulphate and used at ammonium sulphate rates as indicated on the Infinity label will be supported by Bayer. Water conditioning agents that contain ingredients other than ammonium sulphate (additional salt blends, phosphate ester, propionic acid, phosphoric acid, etc.) will not be supported for use with Infinity by Bayer.

At what crop stage can Infinity be applied to the registered crops?

Infinity can be applied to wheat and barley crops from the 1 leaf stage to the appearance of the flag leaf.

What is the rainfast rating for Infinity?

Infinity must be applied to the plant for a minimum of one hour before rainfall occurs.

How much water should I use when applying Infinity?

Ground application – minimum of 5 US gal./ac. (19 L/ac).
Air – minimum of 3 US gal./ac. (11 L/ac).
Bayer recommends using more water to achieve better coverage when applying the product in dense crop canopies or on advanced growth stage weeds.

How many acres does one jug treat?

One 6.7L jug treats 20 acres (2 X 6.7L case will treat 40 acres), a 107.2L Bulk shuttle treats 320 acres and a 335L Bulk tote will treat 1000 acres.

What crops can be grown the year after an Infinity application?

Alfalfa, barley, canary seed, canola, field corn1, flax, oats, field peas2, potatoes, soybeans1, sunflowers and wheat (spring or durum) can be planted 10 months following an application of Infinity. Lentils can be planted back 22 months following an application of Infinity.

1Manitoba only.
2Field peas may be grown the year following Infinity herbicide application in all black, grey-wooded and dark brown soil zones. Do not plant field peas the year following an Infinity application in the brown soil zone where organic matter content is below 2.5% and where soil pH is above 7.5%.

What is the tank mix order?

Infinity first, followed by the tank-mix partner. If adding AMS, always add the AMS to the tank first.

Can I plant field peas following an application of Infinity?

The only scenario where you cannot plant field peas is if you are in the brown soil zone (dark brown, black and grey soil zones have no restrictions), AND you have organic matter content below 2.5% AND soil pH is above 7.5. We only recommend you do not plant field peas if all 3 of those criteria are met.

Growers Talk


We thought Infinity worked very quickly. Weeds started to dry down within 4 to 5 days after spraying while the crop looked very good. We tank-mixed Infinity with Puma®120 Super , and there was no difference between the spring wheat in the Infinity plot and our check strip. We watch our herbicide rotations pretty closely and, because Infinity contains an active ingredient that belongs to a new group, that will make it a lot easier to manage weed resistance. 

- Gord Mann, Storthoaks, Sask.

We have some round-leaved mallow and kochia on the farm, and Infinity did a good job on both of them. Chances are that a lot of the kochia in our area is resistant to Group 2 chemistry, so we were very pleased with the results. We got good control of hemp-nettle, as well. By using Infinity to clean up hemp-nettle in cereals, we hope it will be less of a problem in flax. We'll definitely be using Infinity down the road. It's a good fit for our farm and offers a new rotation option to manage resistance.

- Rick Metzger, Redvers, Sask.

We tank mixed Infinity with Puma120 Super and were very pleased with results. There was no antagonism, the wheat looked good, and Infinity's activity was excellent. Kochia has become a big problem in our area, and Infinity did a good job of controlling it. There's no residue, and Infinity is a new group - we're very impressed with the product.

- Clayton Kuchinka, Future Four Farms Ltd., Macoun, Sask.

Kochia has come out of nowhere to become our No. 1 weed problem, and Infinity did the best job on it of any chemical we've ever used. Infinity was easy to handle - we didn't have to use a surfactant - and the Horizon + Infinity tank mix worked really well. We're also worried about herbicide resistance, and it will be nice to have a new mode of action to manage resistance.

- Shaun Dyrland, Kyle, Sask.

Infinity is the probably the fastest working chemical we've ever used. We could see symptoms on weeds within 24 hours of application, and weeds were dead within a week. We were very pleased with the job that Infinity did on kochia. We've become very reliant on Group 2 chemicals to control kochia, so having a product from a new group is really going to help.

- Paul Hofer, Crop Boss, Arm River Colony, Lumsden, Sask.

We were very pleased with Infinity's activity on cleavers and volunteer canola, and it mixed easily with Puma120 Super for control of wild oats and green foxtail. Infinity's concentrated formulation was nice to handle, too. Being a new mode of action is another thing we like about Infinity. Everyone is worried about resistance, so it's nice to have a new tool that we can use in our rotations.

- Glenn Helgason, Foam Lake, Sask.

Infinity did a terrific job on volunteer flax, cleavers and wild buckwheat. From our experience, there are chemicals that will control some of these weeds but not all of them if they are in the same field. Infinity is the first chemical we've used that did the job. There's also a lot of Group 2–resistant kochia in our area, so having a new mode of action is very, very important for us.

- Blair Goethals, Deloraine, Man.

We were very impressed with both crop safety and how quickly Infinity worked. We could not see any difference between spring wheat sprayed with a tank mix of Infinity + Puma120 Super and the untreated check strip. And the weeds, mainly smartweed and some Canada thistle, were dead within a week after application. Based on the results we got with Infinity, we'd certainly use it again and would also recommend Infinity to anyone who grows spring wheat.

- Thorsten Stanze, Rosenort, Man.

Resistance Management

Group 27

The unique Group 27 active in Infinity gives you another tool to manage resistance. With only three Group 27 herbicides on the market, you can be sure you are getting a powerful herbicide and the newest mode of action in cereal herbicides, giving you another rotational tool for your resistance management strategies.

Infinity herbicide – A unique resistance management tool

What is Resistance?

Resistance is a naturally occuring, inherited ability of some weed biotypes to survive a herbicide treatment that should, under normal use conditions, effectively control a weed population. Some herbicide resistant weeds have naturally developed one or more mechanisms that allow them to survive a herbicide treatment.

For a weed to be considered resistant it must:

  • Normally be controlled by the herbicide
  • Survive a usually lethal dose of the herbicide
  • Be heritable, meaning it is passed from generation to generation

Herbicide-resistant individuals are naturally present within a weed population at very low frequencies.

Did you know that there are over 130 Group 2-resistant biotypes in Western Canada?

What's the impact to farming in Western Canada?

Why is it important to you?

The management issues and yield concerns with herbicide resistance are very real, especially now with an increasing number of herbicide resistant weeds spreading across Western Canada.

Loss of viable herbicide options

  • Have to rely on currently available herbicides for the foreseeable future
  • No herbicides with new modes of action are in advanced trials

Would require changes in weed and crop management practices

  • Zero or reduced tillage rely heavily on herbicides for weed control

Reduced return on investment

  • Increase the cost of weed management
  • Loss of yield potential

The number of weeds with herbicide resistance continues to rise

  • Including weeds resistant to multiple modes of action

How does resistance develop?

The image below demonstrates the interaction between a weed species and a particular mode of action and the development of herbicide resistance at different speeds. It’s clear to see that over time the use of a herbicide quickly changes from being very effective to becoming extremely ineffectual. In fact, by the fifth year of application the herbicide is failing to eliminate herbicide-resistant weeds. It is particularly alarming that there is a dramatic increase in failure rate from the fourth to fifth season.

Development of Herbicide Resistance

% Resistant Weeds in Population Weed Control
0 Application .0001% Excellent
1st Application .00143% Excellent
2nd Application .0205% Excellent
3rd Application .294% Excellent
4th Application 4.22% Excellent
5th Application 60.5% Failure
Source: Weed Science Society of America, 2011

What can you do to delay the onset of herbicide resistance?

  • Don’t rely solely on herbicides for weed control
  • Develop field-specific long-term weed management plans
  • Rotate herbicide groups year over year

General guidelines for herbicide rotations:

  • Avoid repeated use of the same herbicide or herbicides having the same mode of action in the same field year to year
  • Limit the number of applications of a single herbicide or herbicides having the same site of action in a single growing season
  • Use mixtures or sequential treatments of herbicides having different modes of action which are active on the same target weeds whenever possible
  • Use non-selective herbicides pre-seed or pre-emergence to control early flushing weeds (prior to crop emergence) and/or weed escapes

Resistant weed management strategies

  2. Rotate crops as often as possible to utilize the unique modes of action available within the crop.

  4. Time and place fertilizer to benefit your crop, not weeds.

  6. Systematically target problem weeds and respond quickly to changing weed populations.

  8. Scout often and take note of individual weed response to all applications (pre-emergent, post-emergent and pre-harvest).

  10. Make sure you remove all weeds before they set seed – even if you have to pull by hand. Remember the old English proverb: One year seeding, seven years weeding.

  12. Leaving a 1m wide weed-free zone around your cropping fields (so new weeds can’t propagate and expand throughout your fields).

  14. Decrease your row spacing and increase seeding rates to optimize plant populations, maximize crop competitiveness and minimize time to crop canopy closure.

    • Match selection of herbicide(s) with your most difficult weeds.
    • Use full-labelled rates.
    • Include the best tank mixes and adjuvant(s).
    • Use correct spray volume (follow label directions).
    • Use correct nozzle spacing and droplet size.
    • Don’t spray at excess travel speeds, follow label directions.
    • Apply during the best weather conditions (warm, humid, and sunny conditions with minimal wind).
    • Maximize rain-fastness intervals.
    • Time of day (herbicides are most effective when sprayed between 8:00am and 9:00pm).