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More Dual-Action Herbicides To Chose From

Western Canadian farmers will have a few new weed control tools in the field in 2011, as crop protection companies introduce new products or products with expanded registrations to the market place.

There doesn’t appear to be any dramatic new chemical compound available to farmers this coming season, says a weed control specialist with the University of Saskatchewan. But, Ken Sapsford a research assistant in the Department of Plant Science, says farmers will see more dual-action herbicides on the market.

“We’re seeing just about every company now with products that contain two or more different chemistries and modes of action,” says Sapsford. “And what this is addressing is herbicide resistant weed management. We’re seeing a combination of two products, with two different modes of action, that provide control on the same weed. Provided each product is effective, farmers are getting control of both the standard non-resistant weed, as well as any herbicide resistant plants.

“And research is showing that having two modes of action in one product is probably the best way to control herbicide resistant weeds and prevent the spread of more herbicide resistant weeds.”

Sapsford also notes that with more generic herbicides on the market, crop protection companies are able to use the lower cost generic compounds in combination with other herbicides without doubling the cost of the final product.

Here’s a list of new products, new dual-action herbicides and label expansions for 2011 (in alphabetical order).


BASF has no brand-new products for release in 2011, but it has expanded label registration on three products for the coming year.

Heat, which was launched in 2010 as a pre-seed/pre-emergent and chemfallow product that can be tank-mixed with glyphosate has some new weeds added to its registration list, says Mark Oostlander, BASF technical development specialist.

For use with all cereals (barley, oats and all wheats) as well as corn, canary seed, chickpeas, lentils, field peas and soybeans, Heat features a Group 14 active — pyrimidinedione — which is effective on common herbicide resistant weeds.

Label changes for Heat in 2011 include additional control of problem weeds such as dandelion, narrow leaved hawk’s-beard, cleavers and flixweed.

Other label updates new for 2011 include grazing restrictions:

1) Field Corn — corn forage and silage can be harvested, used as feed or grazed 60 or more days after application of HEAT.

2) Legume forage (chickpeas, field peas and lentils) may be used as feed or grazed 60 or more days after application of HEAT.

3) Small grains (wheat, barley and oats) — forage and hay can be used as feed or grazed 30 or more days after application of HEAT.

4) Soybeans — may be used as feed or grazed 60 or more days after application of

Among other BASF products, there is a label expansion for Odyssey XL: For the 2011 season, ODYSSEY DLX has received registration for use on Clearfield sunflowers. For sunflower growers in Manitoba this label expansion means an additional herbicide option for use in Clearfield sunflowers. Currently SOLO herbicide is registered and available for use on Clearfield sunflowers.

And for Viper herbicide, which is registered only for use in peas, a label change for the 2011 season has Viper now registered to provide control of volunteer Clearfield lentils and suppression of Group 2 resistant cleavers.


Velocity m3 from Bayer Crop Science was introduced to producers in 2010, but the company is offering a formulation change for 2011.

Velocity m3 provides effective broad spectrum, broadleaf and grassy weed control in spring wheat and durum, and is now available in a 40 acre case in 2011. This means farmers can just pour and go with no tank mixing, says Matt Dertinger, with Bayer.

Velocity m3 contains two new active ingredients, thiencarbazone (Group 2), and pyrasulfotole (Group 27) and the well known bromxynil (Group 6). It provides control of 16 of the most common grassy and broadleaf weeds such as sow thistle, cleavers, kochia, lamb’s quarters, wild buckwheat and wild oats, as well as suppression on a half dozen other problem weeds such as Canada thistle, dandelion and round-leaved mallow.


Tandem from Dow AgroSciences is a new combination of Group 2 and Group 4 herbicides providing one pass, in-crop grassy and broadleaf weed control in spring wheat and durum, says Dave Van Dam, product manager of cereal grass herbicides.

Tandem is a combination of a Group 2 pyroxsulam and Group 4 fluroxypyr in one product, which eliminates the need for farmers to figure out tank mixes of other herbicides. The Group 2, which is similar to Dow AgroScience product Simplicity, is non-residual, so there are no cropping restrictions in subsequent years.

With the Group 2 component, Tandem effectively controls grassy weeds such as wild oats, barnyard grass, yellow and green foxtail, as well as Japanese brome. With the Group 4 broadleaf component, it also controls major weeds such as cleavers, chickweed, hemp-nettle, kochia, redroot pigweed and others.

Depending on the weed spectrum, Van Dam says farmers could top up Tandem with MCPA or 2,4-D “and pretty well control every annual broadleaf weed in Western Canada,” he says.

Tandem is available as a two-jug liquid formulation, with each case providing 40 acres of coverage.

As incentive, Dow is giving away a tandem truck to one lucky grower in Western Canada. They’d also like to see photos and stories about favorite trucks that are or have been on the farm. For details on the tandem truck contest visit, tion in 2011. It is a combination of two popular DuPont products, Barricade SG and Perimeter, which are Group 2 and Group 4 products respectively.

Jon Gough, product manager, says it provides an excellent package for broadleaf weed control in wheat and barley and gives producers the flexibility to choose whichever compatible grassy weed control product they prefer in a tank mix.

Barricade is a combination of three active ingredients including thifensulfuron and tribenuron which are both Group 2 ingredients in Barricade SG, as well as fluroxypyr which is the Group 4 component of Perimeter.

The product, which comes in 40-acre cases and is also available through DuPont’s PrecisionPac system, is effective on key weeds such as cleavers and kochia, and provides “fantastic control” of narrow-leaved hawk’s-beard, flixweed, storks-bill, volunteer flax and other weeds.

DuPont’s Harmony Max was available on a limited bases in 2010, says Gough. It is a combination of three products, Refine SG, Harmony Grass and Perimeter. Again, fluroxypyr in Perimeter is a Group 4, clodinafop in Harmony Grass is a Group 1, and the two actives in Refine thifensulfuron and tribenuron are Group 2.

Harmony Max, which effectively replaces Harmony C, provides broad-spectrum, broadleaf and grassy weed control in one-pass. It is effective on grassy weeds such as wild oats and green foxtail, and also nails broadleaf weeds such as wild buckwheat, kochia, (including Group 2-resistant kochia), and cleavers.

The product, which comes in 40-acre packaging, also has a surfactant loaded in the jugs for convenience.

DuPont’s PP-6654 is a new blend registered last year, which provides improved broadleaf weed control in spring wheat, durum and barley in the brown soil zone. PP-6654, available through DuPont’s PrecisionPac system, is a combination of Express, thiefensulfuron and dry dicamba which have Group 2 and 4 active ingredients. Its major weed strengths include hemp-nettle, kochia (including Group 2 resistant plants), volunteer canola (except for Clearfield types) and wild buckwheat. PP-6654 can be tank mixed with 2,4-D, DuPont Harmony Grass and Horizon.

In the specialty crop market, DuPont’s ExpressSun for sunflowers (tolerant to Express SG herbicide) will also available to growers in 2011.

There are a number of label registration changes to DuPont products for 2011. They include:

1) Barricade is now registered for control of volunteer flax up to 12 centimeters high

2) Triton C is now registered for use on all barley varieties, including malt barley

3) Express SG is now registered for suppression of scentless chamomile and suppression of white cockle

4) Express SG received minor-use registration for use as a pre-seed burnoff prior to alfalfa, red clover and alsike clover (forage and seed production)

5) Assure II is now registered for foxtail barley

6) Changes among products available through the PrecisonPac system include:

PP-8454 — Approved for aerial application

DB-10550 — Approved for aerial application PP-23235 — Registered for control of scentless chamomile

PP-31155 — Registered for control of stork’s-bill


Authority 480, distributed by Nufarm, is a single mode of action herbicide which received full registration in December 2010. Authority 480 provides chickpea, pea, flax and sunflower growers with an improved tool for controlling broadleaf weeds.

Prior to full registration, Authority, which is a Group 14 herbicide (sulfentrazone), had only limited registration for use in chickpeas only in Saskatchewan. With full registration it can used across Western Canada on a wider range of crops.

The real fit for Authority is the control of broadleaf weeds such as kochia, Group 2-resistant kochia, wild buckwheat, lamb’s quarters, and redroot pigweed in chickpeas and peas, and is important to flax growers looking to control kochia and redroot pigweed in-crop.

Until now, pea growers have had access to several Group 2 herbicides such as Solo, Odyssey and Pursuit but they weren’t effective at controlling Group 2 resistant weeds. And for chickpea growers, Sencor from Bayer CropScience was about the only option. Authority 480 now provides a wider spectrum of weed control.

Farmers should note the herbicide does have to be applied pre-seeding, but can be used in a tank mix with glyphosate. It is rain or moisture dependent to become active and effective, which may not be an issue in many parts of Western Canada this coming spring. It may not be as effective in dry conditions.

Producers should also read the product label for other conditions, which include soil type and texture. For example, Authority should not be used on soils with a pH higher than 7.8 and not used on soils with less than 1.5 per cent organic matter or more than six per cent organic matter. It is recommended for use on medium or fine textured soils only. And because the herbicide is residual in the soil, it does have re-cropping restrictions.


Traxos, from Syngenta Canada, is a new combination Group 1 herbicide offering increased speed of kill of wild oats, green and yellow foxtail, barnyard grass, Persian darnel, proso millet, volunteer canary seed and volunteer tame oats in spring wheat and durum. Traxos also allows farmers a wide choice of tank mix options including broadleaf product Pulsar, new to the Syngenta line up last year. Other broadleaf tank mix choices include Benchmark, Buctril M, Curtail M, Infinity, Trophy, Prestige and Mextrol.

Farmers will also be able to tank mix Traxos with the fungicide Tilt and the insecticide Matador.

With plans for Traxos to be available this spring, it is targeted towards farmers in the brown soil zone. It has received PMRA approval, and registration is expected for use in all soil zones on the Prairies for this cropping season.

Traxos is a new formulation of two proven Group 1 actives, clodinafop (Horizon) and pinoxaden (Axial), combined with a new adjuvant that stabilizes and activates the chemistries. This built-in adjuvant not only hastens, but also enhances annual grassy weed control.

Traxos is applied in spring wheat and durum crops at a rate of 500 ml per acre in five to 10 gallons of water per acre. It can also be applied by air with three gallons of water per acre. It can be safely applied from the first leaf of the crop, all the way up to the fourth tiller. Traxos should be applied at the one to six leaf stage prior to the fourth tiller of wild oats and at the one to five leaf stage of the other grassy weeds listed on the label.

Traxos will be available in 40-acre cases as well as 160-acre drums from most major crop input retailers

LeeHartisafieldeditorforGrainewsin Calgary.Contacthimat403-592-1964orby emailat [email protected]

About the author

Field Editor

Lee Hart

Lee Hart is editor of Cattleman’s Corner based in Calgary.



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