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)

Vineyards and Grapes

Ed Peachey
Revised March 2015

(Note: Some clones may be sensitive to certain herbicides)

GRAPES—Weed and Vegetation Management

General strategy Vegetation management in vineyards is determined by site-specific environmental factors. Weed competition and interference must be minimized within the row while trafficability and soil conservation are required between rows (see “Section L. Vegetation Management in Orchards, Vineyards, and Berries” in this handbook).

Tree Fruits and Nuts

Ed Peachey
Revised March 2015

Pome fruits: apples and pears

Stone fruits: apricots, peaches, nectarines, cherries, prunes, plums

Nuts: hazelnuts, walnuts, and chestnuts

Quick Reference Guide to Herbicides Labeled for Use in Fruit and Nut Crops

Sugar Beets

Don Morishita
Revised March 2015

Note All rates listed are stated as broadcast equivalent (i.e., the amount that would be required for weed control if broadcast sprayed between rows as well as in the row). If sugar beet herbicides are applied in a band, the amount required for 1 acre of beets can be calculated as: broadcast equivalent x (band width ÷ distance between rows).

SUGAR BEETS—Annual Grass and Broadleaf Weeds

dimethenamid-P (Outlook)


Pamela J.S. Hutchinson
Revised March 2015

POTATOES—Volunteer Grain, Weed, or Grass Cover Crop Control before Planting Potatoes

carfentrazone (Aim EC)

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

Time Apply before potatoes have been planted.


Rick Boydston
Revised March 2015

MINT—Annual Grass and Broadleaf Weeds in New Plantings and Established Crop

napropamide (Devrinol 50 DF, Devrinol DF-XT, Devrinol 2XT)

Rate 4 lb ai/A (8 lb/A product)


Rick Boydston
Revised March 2015

HOPS—Annual Grass and Broadleaf Weeds

flumioxazin (Chateau SW)

Rate 0.19 lb ai/A (6 oz/A product).

Time Apply to dormant hops January thru March in a 1- to 1.5-foot band to each side of the hop row. Rain following application will improve preemergence weed control.

Corn (Field, Silage, and Seed Corn)

Joel Felix
Revised March 2015

CORN—Herbicide-resistant Corn

Herbicide-resistant field corn is now commonly grown in the Pacific Northwest. There are four major types of herbicide resistant corn: some that are genetically engineered; and some that are developed by genetic selection of tolerant corn individuals and/or varieties. Failure to apply the correct herbicide to the correct crop will result in serious injury to the corn. Refer to the appropriate herbicide label for guidelines on how to use each product on herbicide-resistant corn.

Canola (including Rape Seed)

Don Wysocki
Revised March 2015

CANOLA—Annual Grass and Some Broadleaf Weeds

ethalfluralin (Sonalan)

Rate 0.55 to 0.95 lb ai/A (5.5 to 9.5 lbs/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 June 2014

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 June 2014

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

ALFALFA SEED—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)

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