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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. Product information is provided by the manufacturers.

Burndown herbicides
Priority: florasulam (Group 2) – Priority mixed with glyphosate controls a wide range of hard-to-kill broadleaf and grassy weeds. When used in combination with glyphosate, Priority may be applied pre-seed or post-harvest prior to seeding wheat (spring, winter and durum), barley and oats. Priority is also registered for use with glyphosate in chemfallow.

Grassy and broadleaf weed herbicides
Focus: carfentrazone (Group 14) + pyroxasulfone (Group 15) – Registered in both corn and soybeans, Focus is a co-pack of two distinct new modes of action. Focus controls major broadleaf and grassy weeds and is powered by the new active ingredient pyroxasulfone, which has unique characteristics providing extended residual weed control well into the season.

Grassy weed herbicides
Bengal WB: fenoxaprop (Group 1) – Bengal WB controls wild oats, barnyard grass and foxtail (green and yellow) in spring wheat, durum and barley with nearly 30 broadleaf tank-mix partners.

Broadleaf weed herbicides
Topline: florasulam (Group 2) and MCPA Ester (Group 4) – TopLine controls a wide spectrum of broadleaf weeds in wheat, barley and oat crops. For best results, TopLine should be applied when weeds are in the one- to four-leaf stage and the cereal crop is in the two- to six-leaf stage.

Rush 24: fluroxypyr and 2,4-D Ester (Group 4) – Rush 24 controls a wide spectrum of broadleaf weeds in spring wheat, durum wheat and barley. With two Group 4 active ingredients, Rush 24 controls tough broadleaf weeds such as cleavers, kochia and wild buckwheat, including Group 2 resistant biotypes.

Label updates
Ares: imazamox + imazapyr (Group 2) – Addition of round-leaved mallow and Russian thistle control to the label.  

Assure II: quizalofop P-ethyl (Group 1) – Now registered for use in sunflower and yellow and brown mustard, and also for the control of Downy Brome.

Frontline XL: florasulam (Group 2) + MCPA (Group 4) – Minor use registration application for control of labelled weeds in seedling or established timothy at the two- to six-leaf stage.

OcTTain XL: fluroxypyr + 2,4-D (Group 4) – Dry beans, potatoes, sugar beets and sunflowers were added as safe to recrop the year following an application of OcTTain. Also registered by air with a recommended water volume of three to five gallons per acre.

Odyssey WDG: imazamox + imazethapyr (Group 2) – Minor use addition for the control of labelled weeds in fababeans.

Prestige XC: fluroxypyr + clopyralid + MCPA (Group 4) – Winter wheat and oats are now registered crops with control of labelled broadleaved weeds. Now registered for aerial application at three to five gallons per acre water volume.

Roundup WeatherMax + Pardner: glyphosate (Group 9) + bromoxynil (Group 6) – New tank-mix registration for Roundup WeatherMax + Pardner preseed canola. This is for additional control of volunteer canola (all types) prior to the planting of canola (all types).

Simplicity: pyroxsulam (Group 2) – Application timing on wheat now from three-leaf stage to just before flag leaf. Addition of corn spurry, cow cockle, shepherd’s purse and stinkweed as controlled weeds and suppression of Canada thistle and Russian thistle. Also registered by air with a recommended water volume of three to five gallons per acre. Addition of potato and sunflowers to safely recrop 10 months after applications. Now registered as rainfast within two hours after application.

Poast Ultra: sethoxydim (Group 1) – A minor use for the control of labelled weeds in fenugreek and grapes.  

Viper ADV: imazamox (Group 2) + bentazon (Group 6) – Amendment of the Viper ADV label to include suppression of group 2 resistant biotypes of kochia. Succulent peas added to label as registered crop.

Pending registration and based on the data submitted by Bayer CropScience, the weeds below will be added to the following product’s labels:

Velocity m3: thiencarbazone (Group 2) + pyrasulfotole (Group 27) and bromoxynil (Group 6)

Tundra: fenoxaprop (Group 1) + pyrasulfotole (Group 27) and bromoxynil (Group 6)

Infinity: pyrasulfotole (Group 27) + bromoxynil (Group 6)

• Stork’s-bill (one- to eight-leaf stage, only with the addition of 2,4-D)
• Giant Ragweed suppression (one- to six-leaf stage, with AMS)
• Canada fleabane (up to 10 cm in height/diameter, with AMS)
• Narrow-leaved Hawk’s beard (up to 10 cm in height, prior to bolting)

March 19, 2014  By Bruce Barker

New herbicide registrations may help better manage herbicide resistance. New herbicide product registrations and label updates continue to bring more choice to farmers managing weed infestations and herbicide resistance.