Trade name(s) Roundup, Rodeo, Kleenup, Accord, Honcho, E-Z-Ject, Jury, Mirage, Protocol, Rattler, Ruler, Silhouette, Glypro, Glyphomax, AquaNeat, Touchdown, Glyphosate, Durango, RT Master, and many others

Manufacturer(s) Monsanto Co., Dow AgroSciences, Syngenta, DuPont, and others

Formulation(s) 1.23, 2, 3, 3.7, 4, 4.17, 4.75, and 5 lb/gal acid equivalent; 64.9% and 85% acid equivalent soluble powder.

Remarks A nonselective translocated herbicide with no apparent soil activity. Rain within 6 hours after application may reduce effectiveness. Glyphosate translocates to roots and rhizomes of perennial weeds. Complete control may require retreatment. Low-volume applications are most effective.

Water solubility 12,000 ppm

Storage conditions Store between -20° and 120°F.

Acute toxicity LD50 - 5,400 mg/kg

Action in plant Inhibits three amino acids and protein synthesis.

Site of action Group 9: inhibits EPSP synthase

Chemical family None generally accepted

Koc Average is 24,000 mL/g (estimated)

Canola (including Rape Seed)

Don Wysocki
Revised March 2016

Annual Grass and Some Broadleaf Weeds

ethalfluralin (Sonalan)

Rate 0.55 to 0.95 lb ai/A (5.5 to 9.5 lb/A Sonalan 10G); 0.56 to 0.938 lb ai/A (1.5 to 2.5 pints/A Sonalan HFP)

Time Apply preplant and incorporate following label instructions.

Birdsfoot Trefoil

Tim Prather
Revised March 2016

2,4-DB (Butyrac or Butoxone)

Rate 0.5 lb ae/A

Time Apply after trefoil has at least two true leaves.

Remarks Controls certain annual broadleaf weeds in new stands. Weeds should be small at the time of application.

Alfalfa Seed

Tim Prather
Revised March 2016

Note Several herbicides labeled for alfalfa grown for seed are not registered for alfalfa grown for forage.

Annual Grass and Broadleaf Weeds in New Seedings

benefin (Balan 60 DF)

Rate 1.2 to 1.5 lb ai/A (2 to 2.5 lb/A Balan 60DF)

Forage Alfalfa

Tim Prather
Revised March 2016

Annual Grass and Broadleaf Weeds in Establishing New Seedings

benefin (Balan DF)

Rate 1.2 to 1.5 lb ai/A (2 to 2.5 lb/A Balan DF)

Time Apply to a clean, clod-free soil surface before planting, and incorporate 2 to 3 inches deep within 4 hours after application.

Grass Hay

Tim Prather
Revised March 2016

2,4-D amine (several trade names)

Rate 0.7 to 2 lb ae/A

Time Depends on weeds to be controlled. Apply to grass when annual and biennial broadleaf weeds are small and actively growing, and established perennials are at bud stage, unless label indicates otherwise.

Conservation Reserve Program

Andy Hulting and Ed Peachey
Revised March 2016

The Conservation Reserve Program (CRP) is designed to control erosion, improve water quality and enhance wildlife habitat on environmentally sensitive land by planting permanent crops. A combination of desirable plants including trees, grasses, legumes, and shrubs must be planted and maintained for the duration of the contract which usually runs for 10 to 15 years. CRP land may not be harvested or grazed by domestic animals except under emergency circumstances following natural disasters, or certain other managed conditions.

Chemical Fallow East of the Cascades

Sandy Macnab
Revised March 2016

2,4-D (several products) + glyphosate (several products)

Rate 0.16 to 0.32 lb ae/A 2,4-D + 0.19 to 0.38 lb ae/A glyphosate. Use the higher rate in no-till, or when plants are beyond seedling stage.

Spring Wheat

Don Morishita and Drew Lyon
Revised March 2016

Preplant and Preemergence Weed Control

carfentrazone (Aim)

Rate 0.008 to 0.031 lb ai/A (0.5 to 2 fl oz Aim EC)

Time Apply before, during, or after grain has been planted.

Winter Wheat-West of the Cascades

Andrew Hulting
Revised March 2016

Preplant Broadleaf and Grass Weed Control

flumioxazin (Valor)

Rate 0.0637 lb ai/A (2.0 oz/A Valor)

Winter Wheat-Irrigated, East of the Cascades

Dan Ball
Revised March 2013

Wild Oat and Grasses

fenoxaprop (Puma)

Rate 0.083 lb ai/A (0.66 pint/A Puma)

Time Apply to actively growing grass weeds in the one- to two-tiller stage of growth and when crop has emerged up to six-leaf stage.

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