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Herbicide registrations and label updates

New herbicide product registrations and label updates continue to bring more choice to farmers managing weed infestations and herbicide resistance. All product information is provided by the manufacturers.

Burndown herbicides

Heat LQ: saflufenacil (Group 14) — A new, easy-to-use liquid formulation for preseed, pre-emergence and chemfallow applications.

Korrex: florasulam (Group 2) and dicamba (Group 4) — A preseed herbicide designed for mixing with all glyphosate formulations, offering SoilActive technology weed control and multiple modes of action on kochia to manage risk of glyphosate resistance. Registered preseed prior to planting wheat, barley or oats.

PrePass FLEX: florasulam (Group 2) — A preseed product for cereal crops with the flexibility to be tank-mixed with any glyphosate formulation. Ideal for farmers who purchase multiple types of glyphosate or who have already purchased their glyphosate supply, it provides SoilActive control of several broadleaf weeds for 21 days, including volunteer canola.

Grassy and broadleaf weed herbicides

Odyssey Ultra: imazamox and imazethapyr (Group 2) and sethoxydim (Group 1) — Combines two different herbicide groups for early-season-flushing broadleaf weed control and superior grass control from Poast Ultra (sethoxydim). Registered in field pea, soybean, Clearfield canola and Clearfield lentil.

Salute: imazamox and imazapyr (Group 2) and clopyralid (Group 4) — A highly effective single pass herbicide combination for use in Clearfield canola. It provides excellent control of wild oats, wild buckwheat, lamb’s-quarters, cleavers and several other key broadleaf weeds in addition to systemic control of Canada thistle.

Broadleaf weed herbicides

Paradigm: arylex (Group 4) and florasulam (Group 2) — Delivers high performance broadleaf weed control in wheat, durum, barley and winter wheat over a wide range of climatic conditions, weed species, and weed and crop stages with Multi Mode of Action control built in for superior resistance management. Paradigm is an ultra concentrated dry formulation utilizing new GoDRI Rapid Dispersion Technology, a dry formulation that works like a liquid.

Pixxaro: arylex and fluroxypyr and MCPA Ester 600 (Group 4) — Delivers high-performance broadleaf weed control in wheat, durum, barley and winter wheat over a wide range of climatic conditions, weed species, and weed and crop stages. Consists entirely of Group 4 mode of action, and controls many common broadleaf weeds including kochia, with complete grass tank-mix flexibility.

Rush M: fluroxypyr and MCPA ester (Group 4) — Registered for use on spring wheat, durum wheat and barley, controlling a wide spectrum of broadleaf weeds including chickweed, cleavers, kochia, hemp-nettle, volunteer flax and wild buckwheat. It is ideal for cleaning up herbicide-tolerant canola volunteers, and excels at controlling Group 2-resistant weeds that are now common on the Prairies, including kochia, common chickweed, cleavers, spiny sow-thistle and wild mustard.

Outshine: florasulam (Group 2), fluroxypyr (Group 4) and MCPA ester (Group 4) — Registered on spring and durum wheat and barley, providing broad-spectrum weed control from three active ingredients and two modes of action. Works on tough broadleaf weeds such as cleavers, chickweed, hemp-nettle, kochia and wild buckwheat.

Label updates

Assure II: quizalofop (Group 1) — Registered for control of downy brome, a tough-to-kill weed that is rapidly expanding throughout the Prairies. Assure II controls tough grassy weeds such as foxtail barley, wild oats and volunteer cereals in canola, flax and pulse crops. Can be applied at any crop stage and has no re-cropping restrictions for the following year.

Authority: sulfentrazone (Group 14) — Registered for preplant/pre-emergent weed control, and now registered prior to soybeans. Cleaver control has been added to the label. For additional weed control in field peas, a new tank-mix with imazethapyr (Group2) has been added to the label. Provides preplant/pre-emergence control of kochia, redroot pigweed, lamb’s-quarters and wild buckwheat, and provides suppression of cleavers in soybeans, field pea, flax, chickpea and sunflower.

Authority Charge: sulfentrazone + carfentrazone (Group 14) — Now registered prior to soybeans; cleaver control has been added to the label. For preplant/pre-emergence control of kochia, redroot pigweed, lamb’s-quarters and wild buckwheat, and provides suppression of cleavers in soybeans, field pea, flax, chickpea and sunflower. For additional weed control in field peas, a new tank-mix with imazethapyr has been added to the label. Also, can be tank-mixed with glyphosate for added burndown weed control.

Axial BIA: pinoxaden (Group 1) — Label expansion includes use on winter wheat along with spring wheat and barley from the one leaf to flag leaf stage. A post-emergent herbicide for the control of grass weeds, including wild oats, green foxtail, yellow foxtail, barnyard grass, volunteer oats, volunteer canary seed and proso millet.

Distinct: dicamba (Group 4) and diflufenzopyr (Group 19) — Provides superior activity on tough-to-control broadleaf weeds, including kochia, dandelion and herbicide-resistant biotypes. Expanded into Western Canada for use on corn (two to six leaf stage), along with the addition of volunteer canola control in corn. In chemfallow, narrow-leaved hawk’s-beard and wild buckwheat added to the 100 g ai/ha rate. A new 200 g ai/ha rate registered for chemfallow/post-harvest weed control.

Everest 2.0: flucarbazone (Group 2) — Winter wheat has been added to the label. Can now be applied in fall or spring from the one leaf to jointing stage of winter wheat. For control of wild oats, green foxtail and some broadleaf weeds such as volunteer canola, stinkweed, redroot pigweed, wild mustard and shepherd’s purse.

Focus: pyroxasulfone (Group 15) and carfentrazone (Group 14) — Now registered for preplant/pre-emergence control of foxtails (green, yellow, giant), barnyard grass, Italian ryegrass and large crabgrass, plus redroot pigweed and common waterhemp in corn and soybeans. Can be tank-mixed with glyphosate for added burndown, and tank-mixed with atrazine in corn for wide-spectrum weed control.

Inferno Duo: flucarbazone + tribenuron (Group 2) — When applied with glyphosate at 180 g ae per acre, now registered for control of foxtail barley up to 10 cm in height in spring wheat (not including durum). For foxtail barley greater than 10 cm, or for heavy infestations or stressed plants, mix with 360 g ae glyphosate per acre.

Valtera: flumioxazin (Group 14) — Now registered for use ahead of field peas (fall application before freeze-up) to control kochia and other labelled weeds. Provides exceptional pre-emergence control of tough weeds such as eastern black nightshade, pigweed and lamb’s-quarters, including those resistant to Group 2 and triazines with crop rotational flexibility.

Viper ADV imazamox (Group 2) and bentazon (Group 6) — Approved minor use for established alsike and red clover grown for seed. Controls a wide range of grassy and broadleaf weeds.

March 4, 2015  By Bruce Barker

New herbicides and label updates are helping farmers cope with weed resistance. New herbicide product registrations and label updates continue to bring more choice to farmers managing weed infestations and herbicide resistance.