CR597.html

Chemical Weed and Brush Control for New Mexico Rangelands


Circular 597
Revised by Keith W. Duncan and Kirk C. McDaniel
College of Agricultural, Consumer and Environmental Sciences, New Mexico State University


Authors: Retired Extension Brush and Weed Scientist, Department of Extension Animal Sciences and Natural Resources, and Retired Professor of Range Science, Department of Animal and Range Sciences, both of New Mexico State University, Las Cruces. (Print friendly PDF)

Noxious woody and weedy plants inhabit much of New Mexico’s rangelands. Dense stands of brush and weeds use vast quantities of water, reduce forage production and contribute to erosion. If rangelands are to reach their productive potential, noxious plants need to be managed effectively. Herbicides can be effective, economical and efficient methods for controlling brush and weeds and improving and maintaining rangelands.

This circular lists current suggestions for herbicides to control woody and herbaceous weeds on rangeland. Some herbicides provide a high degree of control of certain species and a reduced degree of control of other species. However, seldom is a species eradicated. When developing a woody and herbaceous weed management program, consider all possible rangeland uses. Many woody plants and forbs are valuable sources of food and cover for wildlife and can also be important to livestock operations. A woody and herbaceous weed management program should use control methods that provide optimum benefits to both livestock and wildlife.

Herbicides are effective and safe when they are used properly (Appendix A). Misuse can result in poor woody and herbaceous weed control, increased expense, and possible hazards from herbicidal drift or residues that damage or kill desirable plants. Use the following guidelines for proper herbicide use:

  • Correctly identify the plant species and evaluate the need for control.
  • Consider the expected benefits and costs of herbicide and alternative control practices, as well as alternative uses of funds.
  • Select and purchase the appropriate herbicide for the plant species.
  • Provide and require proper safety equipment.
  • Calibrate spray equipment to correctly apply the desired rate.
  • Mix herbicides in a well-ventilated area, preferably outside.
  • Spray under conditions that minimize drift.
  • Read and follow instructions on the label.
  • Keep a record of the herbicide used, time of application, weather conditions, rate of herbicide applied, date, location and applicator.

For successful weed control, the correct quantity of herbicide mixture must be applied to a specific area. To calibrate spray equipment, see NMSU Cooperative Extension Service Guide A-613, Sprayer Calibration (http://aces.nmsu.edu/pubs/_a/A613/welcome.html), on calibrating pesticide applicators. For information about procedures for obtaining a pesticide applicator’s license and other information about applying herbicides properly, contact your county Extension office.

The following suggestions for using herbicides are based upon their effectiveness under New Mexico conditions. Broadcast and individual plant treatments are presented in Table 1. Individual plant treatments are best suited for controlling thin stands of brush (usually less than 150 plants/acre) and for selective control. Broadcast treatments are useful for dense stands of target weed(s).

Suggested herbicides must be registered and labeled for use by the Environmental Protection Agency. Some of the suggested herbicides are restricted-use pesticides and require an applicator’s license for purchase and use. Because the status of herbicide label clearance is subject to change, be certain to use a current label for the herbicide’s intended use.

The user is always responsible for the effects of herbicide residue on livestock and crops, as well as for problems that arise from drift or other herbicide movement from the user’s property to the property of others.

The label is a legal document and violation of it is a federal offense.

Always read and follow carefully the instructions on the container label. Especially note any grazing restrictions that apply to the herbicide.

Plant Index

Plants requiring the same treatment are grouped together

Click plant name to go to plant listing in table 1.

Native Weeds Native Shrubs and Trees Noxious Weeds and Shrubs
Algerita Catclaw acacia African rue
Bitter sneezeweed Catclaw mimosa Bindweed, field
Bitterweed, western Cholla Black henbane
Broomweed (annual or common) Creosotebush Bursage, skeletonleaf
Buckwheat Iris, Rocky Mountain Camelthorn
Camphorweed Juniper (cedar) Cheatgrass
Cattail, common Lotebush Dalmatian and yellow toadflax
Cocklebur Mesquite, grassland Downy brome
Crazyweed (silky or Lambert’s) Mesquite, mixed brush Dyer’s woad
Gumweed, curlycup Prickly pear Goatgrass, jointed
Horehound Rabbitbush Halogeton
Horsemint Sagebrush, big Hoarycress, whitetop and related species
Horsetail, smooth, scouring rush Sagebrush, fringed Knapweed, diffuse and spotted
Houndstongue Sagebrush, sand Knapweed, Russian
Lakeweed Sand shinnery oak Leafy spurge
Larkspur, geyer, tall, or duncecap Shrub oak (wavy leaf, Gambel oak) Perennial pepperweed
Locoweed, whitepoint Skunkbrush sumac Russian olive
Locoweed, wooly Snakeweed (broom, threadleaf, perennial broomweed, turpentine weed) Saltcedar
Milkvetch Tarbush Starthistle, yellow, malta, and purple
Milkweed, showy and related species Whitethorn acacia Thistle, musk, scotch, Canada, and bull
Mustard Willows  
Oxeye daisy Wolfberry
Pepperweed Yucca
Pinque  
Poison ivy
Poison oak
Poverty sumpweed
Praire coneflower
Ragweed, (common or western)
Rayless goldenrod
Sunflower
Thistles and nettles
Threadleaf or Riddel’s groundsel
Water hemlock, western

 

Table 1. Herbicides for controlling undesirable brush and weeds on rangelands.
Plant controlled Trade name and product Herbicide
(common name and active ingredient)
Herbicide quantity
(active ingredient or acid equivalent in parenthesis)
Spray volume
(broadcast per acre or individual plant)
Time of application Remarks
Broadcast rate per acre Individual plant/spot treatment
African rue Arsenal imazapyr 3 pt
(3/4 lb)
1 gal per 100 gal. water
(2 lbs per 100 gal water)
10–25 gal for ground broadcast Spray only actively growing (nonstressed) plants Caution: Arsenal or Velpar L will damage or kill other sprayed or nearby vegetation
Velpar L hexazinone 2 ml/plant Individual plant treatment only Any time of year
Pronone Power Pellets hexazinone 1 pellet/plant
Algerita Velpar L hexazinone   3 ml/3 ft canopy height Individual plant treatment only Any time of year. Optimum is prior to rainy season Do not apply to snow-covered or frozen ground
Pronone Power Pellets hexazinone   1 pellets/2 ft canopy height
Spike 20P tebuthiuron   1/16 oz pellets/3 ft canopy height
Bindweed, field Banvel, Clarity dicamba 1 pt to
1 qt
(1/2 to 1 lb)
  10–25 gal for ground broadcast application.
Use surfactant as per label.
Summer fallow prior to planting and when weeds are actively growing or in late summer or fall prior to post-bloom or killing frost. Follow-up applications should be made in spring to control seedlings. Spring to fall. For suppression, refer to label for crop rotation restrictions
Overdrive dicamba: diflufenzopyr 4 to 8 oz
(5:2 mixture 1/4 to 1/2 lb)
 
Plateau imazapic 4 to 8 oz
(1/16 to 1/8 lb)
 
Weedmaster dicamba:2,4-D 1 pt to
1 qt
(1:3 mixture) (1/2 to 1 lb)
 
Tordon 22K** picloram 1 to 2 qt
(1/2 to 1 lb)
 
Paramount quinclorac 5 to 8 oz
(1/4 to 3/8 lb)
  10–25 gal for ground broadcast.
Add 1–2 pints MSO.
Roundup* glyphosate 4 to 5 qt
(4 to 5 lb)
  10–25 gal for ground broadcast application.
Use surfactant as per label
Full bloom to early seed stage
Tank mix Roundup + Banvel, Clarity glyphosate + dicamba 1 qt + 1/2 pt
(1 lb + 1/2 lb)
  Mid- to late-bloom
Landmaster BW glyphosate:2,4-D 3 1/5 pt
(1:1 l lb)
  Fallow or post-harvest when bindweed has 10 in. runners
2,4-D* 2,4-D 2 to 3 qt
(2 to 3 lb)
  Bud stage or summer; follow in early August
Bitter sneezeweed, broomweed (annual or common), buckwheat, camphorweed, cocklebur, horehound, horsemint, knapweed, lakeweed,
milkvetch, mustard, pinque, pepperweed, prairie coneflower, ragweed (common or western),
sunflower, thistles, nettles, and western bitterweed
2, 4-D* 2, 4-D 1 pt to 1 qt
(1/2 to 1 lb)
 

2–4 gal water for aerial spray;
10–25 gal for ground broadcast application.
Add surfactant as needed.

Spring weeds 4–6 in. high, before blooming, good growing conditions Use 2,4-D amine or low volatile ester. Do not spray near susceptible crops.
Weedmaster dicamba:2,4-D 1 pt to 1 qt
(1:3) 1/2 to 1 lb
   
Tank mix Banvel + 2, 4-D* dicamba + 2, 4-D 1/4 to 1/2 pt (1/8 to 1/4 lb) + 3/4 to 1 1/2 pt (3/8 to 3/4 lb)  
Grazon P+D picloram:2,4-D 1 to 3 pt
(1:2 mixture)
(3/10 to 9/10 lb)
 
Tank mix Tordon 22K** + 2,4D picloram + 2,4-D 1/4 to 3/4 pt (1/16 to 3/16 lb) + 1/2 to 1 1/2 pt (1/4 to 3/4 lb.)  
Chaparral aminopyralid + metsulfuron 2 1/2 to 3 1/3 oz
(1/12 to 1/8 lb)
 
Escort metsulfuron 5/8 to 4/5 oz
(3/8 to 1/2 oz)
 
Cimarron Plus metsulfuron + chlorsulfuron 8/10 to 1 oz
(6/10 to 8/10 oz)
 
Cimarron Max metsulfuron + 2,4-D: dicamba Rate I to II
(1/4 oz + 1 pt to 1/2 oz + 2 pt)
 
Overdrive dicamba: diflufenzopyr 4 to 8 oz
(5:2 mixture 1/4 to 1/2 lb)
     
Milestone aminopyralid 3 to 7 oz
(1/20 to 1/10 lb)
  Add 1/2% nonionic surfactant
GrazonNext aminopyralid: 2,4-D 1 1/2 to 2 pt
(1/2 to 3/4 lb)
   
Black henbane Cimarron Plus metsulfuron + chlorsulfuron 6/10 oz
(1/2 oz)
  10–25 gal for ground broadcast application.
Use surfactants as per label.
Rosette to bloom Seedlings should be controlled the following year
Cimarron Max metsulfuron + 2,4-D: dicamba Rate II
(1/2 oz + 2 pt)
 
Bursage, skeletonleaf 2,4-D* 2,4-D 1 1/2 to 2 qt
(1 1/2 to 2 lb)
  10–25 gal for ground broadcast application Without cultivation, spring and fall Treat after tillage when regrowth is 4–6 in.
Tordon 22K** picloram 2 qt
(1 lb)
  Fully leaved and actively growing  
Banvel, Clarity dicamba 1 to 2 qt
(1 to 2 lb)
  Late summer and fall
Camelthorn Escort XP metsulfuron   3/8 oz
(1/4 oz per 100 gal water)
Individual plant treatment.
Mix in 100 gal water, add 8 oz silicone surfactant
Actively growing Retreatment may be necessary
Arsenal imazapyr   3/4 to 1 1/2 qt
(3/8 to 3/4 lb per 100 gal water)
Milestone aminopyralid 5 to 7 oz
(1/12 to 1/10 lb)
    In vegetative state, prior to bloom
Catclaw mimosa, whitethorn acacia Spike 20P tebuthiuron 3 3/4 to 5 lb pellets
(3/4 to 1 lb)
  Aerial broadcast Any time during year. Optimum is prior to rainy season. Use only on coarse-textured soils.
Tank mix Tordon 22K** + Remedy picloram + triclopyr 2 pt + 1 pt
(1/2 lb* + 1/2 lb)
  2–4 gal oil-in-water emulsion as aerial spray
(1 pt to 1 qt diesel oil in water to make 2–4 gal).
10–25 gal oil-in-water emulsion for ground broadcast
(1/2–1 gal diesel oil-in-water to make 10–25 gal).
When leaves are fully expanded. Good growing conditions. Do not spray near susceptible crops
Reclaim clopyralid 2/3 pt to 2/3 qt
(1/4 to 1/2 lb)
 
Tank mix Reclaim + Remedy clopyralid + triclopyr 1/3 to 2/3 pt + 1/4 to 1/2 pt
(1/8 to 1/4 lb + 1/8 to 1/4 lb)
 
Spike 20P tebuthiuron   1/4 to 1/2 oz per 3 ft of canopy diameter or height Individual plant treatment Any time during year. Optimum is prior to rainy season. Do not apply to frozen or snow-covered ground. Distribute uniformly under canopy.
Catclaw acacia Spike 20P tebuthiuron 5 to 7 1/2 lb of pellets
(1 to 1 1/2 lb)
  Aerial broadcast Any time during year. Optimum is prior to rainy season. Use only on coarse-textured soils
Tank mix Tordon 22K** + Remedy picloram + triclopyr 2 pt + 1 pt
(1/2 lb + 1/2 lb)
  2–4 gal oil-in-water emulsion as aerial spray
(1/2–1 gal diesel oil-in-water to make 2–4 gal).
10–25 oil-in-water emulsion for ground broadcast
(1/2 to 1 gal diesel oil-in-water to make 10–25 gal).
When leaves are fully expanded. Good growing conditions Do not spray near susceptible crops
Spike 20P tebuthiuron   1/4 to 1/2 oz per 3 ft of canopy diameter or height Individual plant treatment Any time during year. Optimum is prior to rainy season. Do not apply to frozen or snow-covered ground. Distribute uniformly under canopy. Use only on coarse-textured soils
Velpar L hexazinone   4 ml per 3 ft of canopy diameter or height      
Cattail, common 2,4-D* 2,4-D   6 qt per 100 gal water
(6 lb per 100 gal water)
Spray to wet with handheld equipment Before cattail heads appear Reapplications may be necessary. Use surfactant as per label.
Rodeo glyphosate   5 3/4 to 7 1/2 pt
(2 7/8 to 3 3/4 lb)
  Early to full bloom  
Habitat imazapyr 2 qt
(1 lb)
  Broadcast When plants are actively growing Use surfactants as per label
Habitat imazapyr   1 gal
(2 lb)
Mix in 100 gal of water, spray to wet. Add surfactant as per label    
Cholla, prickly pear Tordon 22K** picloram   4 to 6 ml per 3 ft of plant height (cholla) or plant width (prickly pear) Individual plant treatment, spot applied Any time during year. Optimum is prior to rainy season. Apply at junction of stem and ground (cholla) or within plant area (prickly pear). Do not treat more than 25% of watershed. Herbicide is very slow acting.H91 May take 2–3 years to show effect.
Tordon 22K** picloram 1 qt
(1/2 lb)
2–4 gal water solution as aerial spray.
10–25 gal water solution as ground broadcast.
Individual plant treatment. Mix 2 gal herbicide in 100 gal water.
Add surfactant as per label.
Any time air temperature is above 60°F and has not been 32°F or below during the past 24 hours. For best results, spray when cacti are in bloom. Do not spray near susceptible crops. Spray to wet.
Vista fluroxypyr   1 to 2%
(1 to 2 gal/100 gal water)
Best during growing season
Surmount picloram: fluroxypyr (1:1)   1 to 2%
(1 to 2 gal/100 gal water)
 
(cholla only) Velpar L hexazinone   4 to 6 ml per 3 ft of plant height Individual plant treatment only Any time during year. Optimum is prior to rainy season. Apply diluted Velpar L to soil surface at junction of stem and ground
Pronone Power Pellets (Cholla only) hexazinone   1 pellet per 2 ft. of plant height
Crazyweed, (silky or Lambert’s); locoweed, whitepoint or wooly Tordon 22K** picloram + 2,4-D 1 qt
(1/2 lb)
  2–4 gal water for aerial spray.
10–25 gal for ground broadcast application.
Add surfactant as per label.
When plants are actively growing and before seeds mature To prevent livestock poisoning, avoid grazing until plants are totally dry
Tank mix Banvel Clarity + 2,4-D* dicamba + 2,4-D 1 qt + 1 qt
(1 lb + 1 lb)
 
Weedmaster dicamba:2,4-D 1 to 2 qt
(1:3 mixture)
(1 to 2 lb)
 
Escort XP metsulfuron 1/2 oz
(3/10 oz)
 
Cimarron Plus metsulfuron + chlorsulfuron 6/10 oz
(1/2 oz)
 
Cimarron Max metsulfuron + 2,4-D: dicamba Rate II (1/2 oz + 2 pt)  
Grazon P+D picloram:2,4-D 1 to 2 qt
(1:4 mixture)
(5/8 to 1 1/4 lb)
 
Tank mix Tordon 22K** + 2,4-D picloram + 2,4-D 1 to 2 qt + 1 1/2 to 3 pt
(1/4 to 1/2 lb + 3/4 to 1 1/2 lb 2,4-D
 
Creosotebush Spike 20P tebuthiuron 3 3/4 to 5 lb of pellets
(3/4 to 1 lb)
  Aerial broadcast Any time during year. Optimum is prior to rainy season. Use 1-lb rate when soils are loam, silt, or sandy clay loam
Tordon 22K** picloram   2 to 4 ml per 3 ft of canopy diameter Individual plant treatment Any time during year. Optimum is prior to rainy season. Distribute uniformly under canopy. Do not apply to frozen or snow-covered ground. Do not treat more than 25% of watershed
Velpar L hexazinone   2 to 4 ml per 3 ft of canopy diameter Individual plant treatment Any time during year. Optimum is prior to rainy season. Apply undiluted Velpar L to soil surface within 3 ft of stem base. Use exact delivery handgun applicator. Do not use on clay soil. Do not apply to frozen or snow-covered ground.
Pronone Power Pellets hexazinone   1 pellet per 1 ft. of canopy diameter
Spike 20P tebuthiuron   1/4 to 1/2 oz per 3 ft of canopy diameter      
Dalmatian and yellow toadflax Telar XP chlorsulfuron 2 oz
(1 1/2 oz)
  10–25 gal for ground broadcast.
Add 0.25% v/v nonionic surfactant.
Actively growing in spring or fall See label
Tordon 22K** picloram 1 to 2 qt
(1/2 to 1 lb)
    Through full bloom or to fall regrowth Especially effective after first killing frost
Downy brome, cheatgrass Aatrex atrazine 1 to 2 pt
(1/2 to 1 lb)
  10–25 gal for ground broadcast When desirable vegetation is dormant  
Gramoxone paraquat 26 oz
(1/2 lb)
  Add 0.25% nonionic surfactant   2 years successive treatment necessary
Oust sulfometuron 1 oz
(3/4 oz)
    Late fall or winter See label
Roundup* glyphosate 1/2 to 1 pt
(1/4 to 1/2 lb)
    After emergence and before seedset  
Plateau, Journey imazapic 9 to 13 oz
(1/7 to 1/5 lb)
  Add 1 qt/A MSO   Use low rate for cheatgrass
Dyer’s woad 2,4-D* 2,4-D 1 1/2 to 2 qt
(1 1/2 to 2 lb)
  10–25 gal for ground broadcast Rosette stage Repeat treatments may be necessary
Escort XP metsulfuron 3/4 oz
(2/5 oz)
  Add 0.25% v/v nonionic surfactant Actively growing plants  
Telar XP chlorsulfuron 1 oz
(3/4 oz)
     
Cimarron Plus metsulfuron + chlorsulfuron 9/10 oz
(3/4 oz)
 
Cimarron Max metsulfuron + 2,4-D: dicamba Rate II
(1/2 oz to 2 pt)
 
Goatgrass, jointed Oust sulfometuron 1 3/10 oz
(1 oz)
  10–25 gal for ground broadcast application or
2–4 gal for aerial broadcast
Late fall or winter See label
Plateau imazapic 4 to 6 oz
(1/16 to 3/32 lb)
    Fall
Roundup glyphosate 2 1/2 to 3 pt
(1 1/4 to 1 1/2 lb)
  Spot treatments When fully tilled For spot treatment
Gumweed, curlycup Escort XP metsulfuron 1 oz
(3/5 oz)
  10–25 gal for ground broadcast or
2–4 gal for aerial broadcast. Add 0.25% v/v nonionic surfactant.
Early spring See label
Cimarron Plus metsulfuron + chlorsulfuron 1 1/4 oz
(1 oz)
 
2,4-D* 2,4-D 2 qt
(2 lb)
 
Tordon 22K** picloram 1 pt
(1/4 lb)
 
Grazon P+D picloram:2,4-D 2 qt
(1:2 mixture)
(1 1/5 oz)
 
GrazonNext aminopyralid: 2,4-D 1 1/2 to 2 pt
(1/2 to 3/4 lb)
 
Tank mix Tordon 22K**+2,4-D picloram + 2,4-D 1 pt + 1 qt
(1/4 lb + 1 lb)
 
Halogeton Escort XP metsulfuron 1 oz
(6/10 oz)
  10–25 gal for ground broadcast.
Add 0.25% v/v nonionic surfactant.
Early spring with good growth  
Telar XP chlorsulfuron 1/2 to 1 oz
(3/8 to 3/4)
 
Cimarron Plus metsulfuron + chlorsulfuron 1 1/4 oz
(1 oz)
 
Cimarron Max metsulfuron + 2,4-D: dicamba Rate II
(1/2 oz + 2 pt)
 
2,4-D* 2,4-D 2 qt
(2 lb)
 
Hoarycress, whitetop and related species 2,4-D* 2,4-D 2 qt
(2 lb)
  10–25 gal for ground broadcast.
Add 0.25% v/v nonionic surfactant.
Before bud stage Repeat treatment may be necessary
Chaparral aminopyralid + metsulfuron 2 1/2 to 3 1/3 oz
(1/12 to 1/8 lb)
  Spring or fall  
Telar XP chlorsulfuron 1 oz
(3/4 oz)
  Bud to early bloom See label
Escort XP metsulfuron 1 oz 3/5 oz    
Cimarron Plus metsulfuron + chlorsulfuron 1 1/4 oz
(1 oz)
 
Cimarron Max metsulfuron + 2,4-D: dicamba Rate III
(1 oz + 4 pt)
   
Plateau imazapic 8 to 12 oz
(1/8 to 3/16 lb)
 
Horsetail, smooth, scouring rush Telar XP chlorsulfuron 1 to 2 oz
(3/4 to 1 1/2 oz))
  10–25 gal for ground broadcast.
Add nonionic surfactant at 1 pt to 1 qt/100 gal spray solution.
Early spring See label
Escort XP metsulfuron 1 to 2 oz
(3/5 to 1 1/5 oz)
 
Oust sulfometuron 1 1/2 oz
(1 1/8 oz)
 
MCPA (4EC) Ester 2, 4-D 1 qt
(1 lb)
  Before cone heads appear Important to use the isoctylester formulation
Houndstongue 2,4-D* 2,4-D 2 qt
(2 lb)
  10–25 gal for ground broadcast.
Add 0.25% v/v nonionic surfactant.
Early before bloom  
Escort XP metsulfuron 1 oz
(3/5 oz)
  Before bolting See label
Plateau imazapic 13 oz
(1/5 lb)
  Add MSO at 1 1/2–2 pt/acre Before bloom  
Cimarron Plus metsulfuron + chlorsulfuron 1 1/4 oz
(1 oz)
 
Cimarron Max metsulfuron + 2,4-D: dicamba Rate III
(1 oz + 4 pt)
       
Iris, Rocky Mountain 2,4-D* 2,4-D 2 qt
(2 lb)
  10–25 gal for ground broadcast Early bloom stage Wet thoroughly
Juniper (cedar) Spike 20P tebuthiuron 5 to 10 lb of pellets
(1 to 2 lb)
  Ground or aerial broadcast Any time during year. Optimum is prior to rainy season. Use only on coarse-textured soils.
Velpar L hexazinone   4 to 6 ml per 3 ft of canopy height Individual plant treatment Any time during year. Optimum is prior to rainy season. Apply evenly around trees at dripline. Do not treat more than 25% of watershed. Do not apply to froze or snow-covered groun+H416d. Treat trees under 9 ft.
Tordon 22K** picloram   4 to 6 ml per 3 ft of canopy height
Knapweed, diffuse and spotted Tordon 22K** picloram 1 1/2 pt
(3/8 lb)
  10–25 gal for ground broadcast.
3–4 gal for aerial broadcast.
Add 0.25% v/v nonionic surfactant.
Rosette to mid-bolting  
Grazon P+D picloram:2,4-D 2 to 3 qt
(1:2 mixture)
(1 1/4 to 1 7/8 lb)
 
Tank mix Tordon 22K** + 2,4-D picloram + 2,4-D 2 to 3 pt + 3 to 4 1/2 pt
(1/2 to 3/4 lb + 3 to 4 1/2 lb)
 
2,4-D* 2,4-D 2 qt
(2 lb)
  Early stage of flower stem elongation
Chaparral aminopyralid + metsulfuron 2 1/2 to 3 1/3 oz
(1/12 to 1/8 lb)
  Spring of fall
Tank mix Banvel, Clarity + 2,4-D* dicamba + 2,4-D 1 pt + 1 qt
(1/2 lb + 1 lb 2,4-D)
  Rosette stage before bolting
Curtail clopyralid:2,4-D 2 to 3 qt
(1:5 mixture)
(1 1/15 to 1 4/5 lb)
  See label
Reclaim clopyralid 1/3 to 1 1/3 pt
(1/8 to 1/2 lb)
 
Milestone aminopyralid 5 to 7 oz
(1/12 to 1/10 lb)
 
Knapweed, Russian Roundup* glyphosate 4 4/5 qt
(4 4/5 lb)
  10–25 gal for ground broadcast Late bud to early flower Retreatment may be necessary
Tordon 22K** picloram 1 to 2 qt
(1/2 to 1 lb)
  Early flower to frost  
Curtail clopyralid:2,4-D 1 to 2 qt
(1:5 mixture)
(3/5 to 1 1/5 lb)
  Full bloom to frost See label
Reclaim clopyralid 2/3 to 1 1/3 pt
(1/4 to 1/2 lb)
  Full bloom to frost  
Plateau imazapic 12 oz
(3/16 lb)
  Fall and winter Add 1% v/v MSO
Milestone aminopyralid 5 to 7 oz
(1/12 to 1/10 lb)
 
Telar XP chlorsulfuron 1 to 3 oz
(3/4 to 2 1/4 oz)
  Prebloom to bloom and fall rosette
Chaparral aminopyralid + metsulfuron 2 1/2 to 3 1/3 oz
(1/12 to 1/8 lb)
  Spring or fall
Larkspur, geyer Escort XP metsulfuron 1 1/2 oz
(9/10 oz)
  10–25 gal for ground broadcast.
Add 0.25% v/v nonionic surfactant.
Rosette  
Tordon 22K** picloram 1 1/2 to 2 qt
(3/8 to 1/2 lb)
  Rapidly growing
Larkspur, tall or duncecap Escort XP metsulfuron 1 1/2 oz
(9/10 oz)
  10–25 for ground broadcast.
Add 0.25% v/v nonionic surfactant.
6 to 8 leaf stage; less than 8 in. tall  
Tordon 22K** picloram 2 to 3 qt
(1 to 1 1/2 lb)
  Bud stage
Leafy spurge Banvel, Clarity dicamba 2 qt
(2 lb)
  10–25 for ground broadcast. Add 0.25% v/v nonionic surfactant. Spring to early summer Retreatment is necessary
Tordon 22K** picloram 1 to 3 pt
(1/2 to 1 1/2 lb)
 
2,4-D* 2,4-D 1 qt
(1 lb)
 
Plateau imazapic 8 to 12 oz
(1/8 to 3/16 lb)
  Add 1% v/v MSO Late summer through fall. Spring to early summer
Tank Mix Overdrive + Tordon 22K dicamba: diflufenzopyr + picloram 4 to 6 oz + 8-16 oz
(1/4 to 3/8 + 1/8 to 1/4 lb)
 
Lotebush Spike 20P tebuthiuron   1/4 to 1/2 oz per 3 ft of canopy diameter or height Individual plant treatment Any time during year. Optimum is prior to rainy season. Distribute pellets uniformly under canopy.
Velpar L hexazinone   2 to 4 ml per 3 ft of plant diameter or height, or 2 to 4 ml per inch of stem diameter Apply diluted Velpar L to soil surface within 3 ft of stem base. Use exact delivery handgun applicator. Do not use on clay soils. Do not apply to frozen or snow-covered ground.
Pronone Power Pellets hexazinone   1 pellet per 2 ft plant diameter or height
Mesquite, grassland Remedy (suppression) triclopyr 1/2 to 1 pt
(1/4 to 1/2 lb)
  2–4 gal oil-in-water emulsion as aerial spray
(1 pt to 1 qt diesel fuel oil and water to make 2–4 gal/acre).
10–25 gal oil-in-water emulsion
(1/2 to 1 gal diesel fuel oil and water to make 20–25 gal/acre) as ground broadcast.
Add surfactant as needed.
Spring to early summer, 40–90 days after bud break Apply only when soil moisture conditions are good and plants have full leaf cover of even-aged, undamaged leaves. Do not apply when mesquite plants are stressed from drought, frost, hail, wind, or insects. Do not apply near susceptible crops.
Reclaim clopyralid 2/3 pt to 2/3 qt
(1/4 to 1/2 lb)
 
Tank mix Reclaim + Remedy clopyralid + triclopyr 1/3 to 1 pt + 1/4 to 3/4 pt
(1/8 to 3/8 lb + 1/8 to 3/8 lb)
 
Sendero clopyralid + aminopyralid 28 oz  
Sendero + Remedy clopyralid + aminopyralid + triclopyr 28 oz + 8 to 16 oz  
Sendero + Surmount clopyralid + aminopyralid + picloram + fluroxypyr 28 oz + 1 to 2 qt  
Remedy Ultra triclopyr   3 pt
(1 1/2 lb per 100 gal)
Individual plant treatment Spring to early summer, 40–90 days after bud break Spray must cover all parts
Velpar L hexazinone   4 to 6 ml per 3 ft of plant diameter or height, or 2 to 4 ml per inch of stem diameter Any time of year. Optimum is prior to rainy season. Apply undiluted Velpar L to soil surface within 3 ft of stem base. Use exact delivery handgun applicator. Do not use on frozen or snow-covered ground.
Pronone Power Pellets hexazinone   1 pellet per 2 ft of plant diameter or height
Mesquite, mixed brush (catclaw, tarbush, whitehorn, creosotebush, broom snakeweed, wolfberry) Spike 20P tebuthiuron 3 3/4 to 7 1/2 lb of pellets
(3/4 to 1 1/2 lb)
  Aerial broadcast Any time of year. Optimum is prior to rainy season. Low rate may be used on sand or loamy sand soils
Tank mix Banvel + Remedy dicamba + triclopyr 1/2 to 1 pt + 1/2 to 1 pt
(1/4 to 1/2 lb + 1/4 to 1/2 lb)
 

2–4 gal oil-in-water emulsion as aerial spray
(1 pt to 1 qt of diesel fuel oil and water to make 2–4 gal/acre).
10–25 gal oil-in-water emulsion as ground broadcast
(1/2–1 gal diesel fuel oil to make
20–25 gal/acre).
Add surfactant as needed.

Spring to early summer, 40–90 days after bud break For best results, monthly precipitation should exceed the annual average from January to the spray season. Foliar sprays should be applied only where there are few associate weeds, such as broom snakeweed, shinnery oak, catclaw, etc. These nontarget species may dominate a stand after mesquite control and provide undesirable results.
Milkweed, showy and related species Tordon 22K** picloram 2 to 3 qt
(1 to 1 1/2 lb)
  10–25 gal for ground broadcast. 0.25% v/v nonionic surfactant. Bud to early bloom See label
Banvel, Clarity dicamba 2 qt
(2 lb)
  Emergence to bloom
Oxeye daisy Remedy triclopyr 1 1/3 pt
(2/3 lb)
  10–25 gal for ground broadcast Actively growing Retreatment may be necessary
Tordon 22K** picloram 1 to 2 pt
(1/4 to 1/2 lb)
 
Perennial pepperweed Escort XP metsulfuron 1 oz
(3/5 oz)
  10–25 gal for ground broadcast.
Add 0.25% v/v nonionic surfactant.
Late bud to early flower See label
Cimarron Plus metsulfuron + chlorsulfuron 1 1/4 oz
(1 oz)
 
Telar XP chlorsulfuron 1 oz
(7/10 oz)
 
Roundup glyphosate 3 to 4 qt
(3 to 4 lb)
  25–40 gal for ground broadcast Mow plants when bolting bud stage, spray resprouting plants Wait until all resprouts emerge before applications
2,4-D* 2,4-D* 2 qt
(2 lb)
    Late bud to early flower Retreatments may be necessary
Poison ivy, poison oak Roundup* glyphosate 4 to 6 qt
(4 to 6 lb)
  10–25 gal for ground broadcast Actively growing.  
Roundup glyphosate   2 gal per 100 gal water
(8 lb/100 gal water)
2% v/v individual plant treatment
Garlon 3A Ultra triclopyr 1 to 3 gal
( 3 to 9 lb)
  10–25 gal for ground broadcast Add 0.25% v/v nonionic surfactant
Garlon 4 Ultra, Remedy triclopyr 1 to 2 gal
(4 to 8 lb)
 
Garlon 3A Ultra triclopyr   4 qt/100 gal water
(3 lb/100 gal water)
Individual plant treatment
Garlon 4 Ultra, Remedy     3 qt/100 gal water
(3 lb/100 gal water)
Poverty sumpweed Banvel, Clarity dicamba 1 to 2 qt
(1 to 2 lb)
  10–25 gal for ground broadcast.
Add 0.25% v/v nonionic surfactant.
Actively growing  
Tordon 22K** picloram 2 pt
(1/2 lb)
   
2,4-D* 2,4-D 4 to 6 qt
(4 to 6 lb)
 
Rabbitbush Velpar L hexazinone   4 to 6 ml per 3 ft of plant diameter Individual plant treatment Any time of year. Optimum is prior to rainy season. Apply undiluted Velpar L to soil surface within 3 ft of stem base. Do not use on clay soils. Do not apply to frozen or snow-covered ground.
Pronone Power Pellets hexazinone   1 pellet per 2 ft. plant diameter
Rayless goldenrod Spike 20P tebuthiuron 5 lb of pellets
(1 lb)
  Aerial broadcast Any time of year. Optimum is prior to rainy season. Do not apply to frozen or snow-covered ground
Spike 20P tebuthiuron   1/4 to 1/2 oz per 3 ft of canopy diameter Individual plant treatment Distribute pellets uniformly under canopy. Do not apply to frozen or snow-covered ground.
Tordon 22K** picloram 1 qt
(1/2 lb)
10–25 gal for ground broadcast.
2–4 gal for aerial broadcast
Fall, after blooming and before frost Do not spray near susceptible crops
Escort XP metsulfuron 4/5 oz 1/2 oz
Cimarron Plus metsulfuron + chlorsulfuron 1 oz
(8/10 oz)
Russian olive (see also saltcedar) See saltcedar     See saltcedar See saltcedar See saltcedar See saltcedar
Roundup glyphosate   5 to 7 gal per 100 gal of water Individual plant treatment June–July  
Sagebrush, big Spike 20P tebuthiuron 2 1/2 lb of pellets
(1/2 lb)
  Aerial broadcast Any time of year. Optimum is prior to rainy season. Select productive sites for treatment
Sagebrush, fringed 2,4-D* 2,4-D 2 qt
(2 lb)
  10–25 gal for ground broadcast. 2–4 gal for aerial broadcast. Actively growing Repeat for 2 more years as necessary
Spike 20P tebuthiuron 2 1/2 to 3 3/4 lb pellets
(1/2 to 3/4 lb)
  Aerial or ground broadcast Any time of year. Optimum is prior to rainy season.  
Sagebrush, sand 2,4-D* low volatile ester 2,4-D 1 to 2 qt
(1 to 2 lb)
  2–4 gal water solution for aerial spray.
10–25 gal water solution for ground broadcast application.
Use surfactant as needed.
May 1 to June 15 with good growing conditions Do not spray when plants are defoliated by late frost, drought, or other unfavorable growing conditions. Do not spray near susceptible crops.
Spike 20P tebuthiuron 2 1/2 to 3 3/4 lb of pellets
(1/2 to 3/4 lb)
  Aerial or ground broadcast Any time of year. Optimum is prior to rainy season.  
Saltcedar Arsenal, Habitat imazapyr   1 gal per 100 gal water
(2 lb per 100 gal water with 0.25% surfactant)
Individual plant treatment or ground application August through September Spray to wet, especially the terminal ends of all branches. Allow two full growing seasons before follow-up treatment.
Tank mix Arsenal, Habitat + Roundup* imazapyr + glyphosate   1/2 to 1 gal + 1/2 to 1 gal
(1 to 2 lb + 2 to 4 lb per 100 gal water with 0.25% surfactant)
Tank mix Arsenal, Habitat + Rodeo imazapyr + glyphosate   1/2 to 1 gal + 1/2 to 1 gal
(1 to 2 lb + 2 to 4 lb per 100 gal water with 0.25% surfactant)
Arsenal, Habitat imazapyr 1/2 gal
(1 lb)
Aerial broadcast
Add 0.25% nonionic Surfactant
  10–15 gal per acre total solution. Allow two full growing seasons before follow-up treatment.
Tank mix Arsenal, Habitat + Roundup* imazapyr + glyphosate 1 to 1 1/2 qt + 1 to 2 pt
(1/2 to 3/4 lb + 1/2 to 1 lb)
Tank mix Arsenal, Habitat + Rodeo imazapyr + glyphosate 1 to 1 1/2 qt + 1 to 1 1/2 pt
(1/2 to 3/4 lb + 1/2 to 1 lb)
Sand shinnery oak Spike 20P tebuthiuron 2 1/2 to 5 lb of pellets
(1/2 to 1 lb)
  Aerial broadcast Any time of year. Optimum is prior to rainy season.  
Velpar L hexazinone   2 to 4 ml per 33 square ft of canopy diameter Individual plant treatment Any time of year. Optimum is prior to rainy season. Apply undiluted Velpar L to soil surface within 3 ft of stem base or in a grid pattern. Use exact delivery handgun applicator. Do not apply to frozen or snow-covered ground.
Pronone Power Pellets hexazinone   1 to 2 pellets per 33 square ft. of canopy diameter
Spike 20P tebuthiuron   1/2 oz per 22 sq ft when treating a thicket or clump     Distribute uniformly under canopy. Do not apply to frozen or snow-covered ground.
Shrub oak (wavy leaf, Gambel oak) Spike 20P tebuthiuron 3 3/4 to 7 1/2 lb of pellets
(3/4 to 1 1/2 lb)
  Aerial broadcast Any time during year. Optimum is prior to rainy season. Distribute uniformly under canopy. Do not apply to frozen or snow-covered ground.
Velpar L hexazinone   2 to 4 ml per 33 square ft of canopy diameter Individual plant treatment.
Any time during year.
Optimum is prior to rainy season Apply undiluted Velpar L to soil surface within 3 ft of stem base. Use exact delivery handgun applicator. Do not use on clay soils. Do not apply to frozen or snow-covered ground.
Pronone Power Pellets hexazinone   1 to 2 pellets per 33 square ft. of canopy diameter
Spike 20P tebuthiuron   1/4 oz per 22 sq ft when treating a clump or thicket Individual plant treatment.
Any time during year.
Optimum is prior to rainy season Distribute uniformly under canopy. Do not apply to frozen or snow- covered ground
Arsenal imazapyr   1 gal per 100 gal water
(1 gal per 100 gal water)
Individual plant treatment or ground application Any time during growing season when growing conditions are good Spray to wet. Use 0.25% nonionic surfactant
Skunkbrush sumac Spike 20P tebuthiuron 3 3/4 to 5 lb of pellets
(3/4 to 1 lb)
  Aerial ground broadcast.
Any time during year.
Optimum is prior to rainy season Do not apply to frozen or snow-covered ground.
Spike 20P tebuthiuron   1/4 to 1/2 oz per 3 ft of canopy diameter or height Individual plant treatment Any time during year. Optimum is prior to rainy season. Distribute uniformly under canopy.
Snakeweed (broom, threadleaf, perennial broomweed, turpentine weed) Tordon 22K** picloram 1 pt to 1 qt
(1/4 to 1/2 lb)
  2–4 gal water for aerial spray;
10–25 gal for ground broadcast application.
Add surfactant as needed.
Fall, after full bloom, or spring when growing conditions are good Use drift control agent and add emulsifier to oil. Foliar sprays are recommended where broom snakeweed is the primary species.
Tank mix Tordon 22K** + 2,4-D picloram + 2,4-D 1 pt to 1 qt + 1 qt
(1/4 to 1/2 lb + 1 lb)
 
Grazon P+D picloram:2,4-D 1 to 2 qt
(1:4 mixture)
(5/8 to 1 1/4 lb)
 
Weedmaster dicamba:2,4-D 1 1/2 to 2 qt
(1:3 mixture)
1 1/2 to 2 lb
 
Escort XP metsulfuron 5/8 to 4/5 oz
(3/8 to 1/2 oz)
 
Cimarron Plus metsulfuron + chlorsulfuron 6/10 oz
(1/2 oz)
 
Cimarron Max metsulfuron + 2,4-D: dicamba Rate II
(1/2 oz + 2 pt)
       
Spike 20P tebuthiuron 3 3/4 to 5 lb of pellets
(3/4 to 1 lb)
  Aerial broadcast Any time during year. Optimum is prior to rainy season. Use only on coarse-textured soils.
Starthistle, yellow, malta, and purple Escort XP metsulfuron 1 oz
(3/5 oz)
  10–25 gal for ground broadcast.
Use surfactant as per label.
Seedling to early bud  
Cimarron Max metsulfuron + 2,4-D: dicamba Rate III
(1 oz + 4 pt)
 
Overdrive dicamba: diflufenzopyr 4 oz
(1/4 lb)
    Rosette
Remedy triclopyr 3 pt
(1 1/2 lb)
    Spring to early bud
2,4-D* 2,4-D 1 qt
(1 lb)
 
Arsenal imazapyr 1 pt
(1/4 lb)
 
Tordon 22K** picloram 1 pt
(1/4 lb)
 
Banvel, Clarity dicamba 1 pt
(1 lb)
 
Reclaim clopyralid 2/3 pt
(1/4 lb)
 
Grazon P+D picloram:2,4-D 2 qt
(1:4 mixture)
(1 1/4 lb)
 
Milestone aminopyralid 3 to 5 oz
(1/20 to 1/12 lb)
 
Tarbush Spike 20P tebuthiuron 2 1/2 to 3 3/4 lb of pellets
(1/2 to 3/4 lb)
  Aerial broadcast Any time during year. Optimum is prior to rainy season.  
Tordon 22K** picloram   2 to 4 ml per 3 ft of canopy diameter Individual plant treatment.
Apply any time during year.
Optimum is prior to rainy season. Apply undiluted Tordon 22K to soil surface within 3 ft of stem base. Use exact delivery handgun applicator. Do not apply to frozen or snow-covered ground.
Spike 20P tebuthiuron   1/3 to 1/2 oz per 3 ft of canopy diameter     Distribute uniformly under canopy. Do not apply to frozen or snow-covered ground.
Thistle, musk, scotch, Canada, and bull Escort XP metsulfuron 1/2 to 1 oz
(3/10 to 3/5 oz)
  10–25 for ground broadcast.
Add 0.25% nonionic surfactant.
Rosette  
Cimarron Plus metsulfuron + chlorsulfuron 6/10 to 1 1/4 oz
(1/2 to 1 oz)
 
Cimarron Max metsulfuron + 2,4-D: dicamba Rate II to III
(1/2 oz + 2 pt to 1 oz + 4 pt)
 
Telar XP chlorsulfuron 1/2 to 1 oz
(3/8 to 3/4 oz)
 
Tordon 22K** picloram 1 to 2 pt
(1/4 to 1/2 lb)
  Before bolting
Overdrive dicamba: diflufenzopyr 4 to 6 oz
(1/4 to 3/8 lb)
  Rosette to bolting
Plateau imazapic 8 to 12 oz
(1/8 to 3/16 lb)
  Early spring or fall
Curtail clopyralid:2,4-D 1 to 2 qt
(1:5 mixture)
3/5 to 1 1/5 lb
   
Tank mix Remedy + 2,4-D triclopyr + 2,4-D 1 1/3 pt + 1 to 2 qt
(2/3 lb + 1 to 2 lb)
 
Milestone aminopyralid 3 to 7 oz
(1/20 to 1/10 lb)
  Use higher rates for Canada thistle
Threadleaf or Riddel’s groundsel 2,4-D* 2,4-D 2 to 4 qt
(2 to 4 lb)
  10–25 gal for ground broadcast.
Add 0.25% v/v nonionic surfactant. 2–4 gal for aerial broadcast
Actively growing, prior to bloom  
Weedmaster dicamba:2,4-D 1 to 2 qt
(1:3 mixture)
1 to 2 lb
 
Tank mix Banvel + 2,4-D* dicamba + 2,4-D 1/2 to 1 pt + 1 1/2 to 3 pt
(1/4 to 1/2 lb + 3/4 to 1 1/2 lb)
 
Banvel dicamba 1 pt
(1/2 lb)
 
Tank mix Tordon 22K** +2,4-D picloram + 2,4-D 1 to 2 pt + 1 1/2 to 3 pt
(1/4 to 1/2 lb + 3/4 to 1 1/2 lb)
 
Grazon P+D picloram:2,4-D 1 to 2 qt
(1:4 mixture) 5/8 to 1 1/4 lb
 
Tordon 22K** picloram 1 qt
(1/2 lb)
 
Telar XP chlorsulfuron 1/2 to 1 oz
(3/8 to 3/4)
 
Escort XP metsulfuron 5/8 to 4/5 oz
(3/8 to 1/2 oz)
 
Cimarron Plus metsulfuron + chlorsulfuron 8/10 to 1 oz
(6/10 to 8/10 oz)
 
Cimarron Max metsulfuron + 2,4-D: dicamba Rate II
(1/2 oz + 2 pt)
 
Water hemlock, western 2,4-D* 2,4-D 1 to 2 qt
(1 to 2 lb)
  10–25 gal for ground broadcast Flower bud stage See label
Willows 2,4-D* 2,4-D   2 to 3 qt
(2–3 lb pr 100 gal of water solution)
Individual plant treatment
(2–3 lb per 100 gal of water solution)
Spring, when leaves are fully expanded. Good growing conditions. Wet foliage thoroughly. Do not spray when plants are defoliated by late freeze, hail, insects, or other unfavorable conditions.
Arsenal, Habitat imazapyr   1 gal
(2 lb per 100 gal water + 0.25% surfactant)
Individual plant treatment Any time during growing season. Good growing conditions.  
Tank mix Arsenal + Roundup* imazapyr + glyphosate   1/2 to 1 gal + 1/2 to 1 gal
(1 to 2 lb + 2 1/2 to 5 lb per 100 gal water + 0.25% surfactant)
Tank mix Arsenal, Habitat + Rodeo imazapyr + glyphosate   1/2 to 1 gal +1/2 to 1 gal
(1 to 2 lb + 2 1/2 to 5 lb per 100 gal water + 0.25% surfactant)
Yucca Velpar L hexazinone   4 to 7 ml per whorl Individual plant treatment Any time during year. Optimum is prior to rainy season. Apply undiluted Velpar L directly to whorl
Remedy triclopyr   3 to 4 ml per whorl Individual plant treatment Any time during year Apply to every whorl. May be mixed with water or diesel.
Arsenal imazapyr   2 to 3 ml per whorl Apply to every whorl. May be mixed with water.
Cimarron Max + 2,4-D low volatile ester metsulfuron + chlorsulfuron + 2,4-D Rate II
(1/2 oz + 2 pt) + 1 pt to 1 1/2 pt 2,4-D
(1/2 lb to 1/4 lb)
Spray each whorl thoroughly mix in 100 gal water 4 gal/ac minimum Spring through fall Crop oil concentrate, MSO or MSO/organosilicone are preferred adjuvants
Cimarron Plus metulfuron + 2,4-D: dicamba 5/8 oz + 1 qt
(1 lb)
 

Appendix A. Common Chemical and Product Names of Herbicides

The herbicides are identified by the accepted Weed Science Society of America common name or other common designation, the correct chemical names as required on the label, and, where practical, one or more product names. Herbicides marketed under three or more labels have been designated “several manufacturers” rather than attempting to list all the trade formulations.

Herbicide Common name Chemical Name Trade Name Active Ingredient or Acid Equivalent
2,4-D (2,4-dichlorophenoxy) acetic acid Several manufacturers Amine salts and esters, 4 lb/gal, 6 lb/gal, others
Aminopyralid 2-pyridine carboxylic acid, 4 amino-3,6-dichloro-2-pyridinecarboxylic acid Milestone 2 lb/gal
Aminopyralid:2,4-D (1:8) See aminopyralid and 2,4-D GrazonNext 3 lb/gal
Aminopyralid:Metsulfuron See aminopyralid and metsulfuron Chaparral 0.62 lb/gal: 0.0945 lb of product
Atrazine 6-chloro-N-ethyl-N’-(1-methylethyl)-1,3,5-triazine-2,4-diamine Several manufacturers ----
Chlorsulfuron 2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino] carbonyl] benzenesulfonamide Telar XP 75%
Clopyralid 3,6-dichloro-2-pyridinecarboxylic acid Reclaim, Stinger, Transline 3 lb/gal
Clopyralid:2,4-D (1:5) See clopyralid and 2,4-D Curtail 2 3/8 lb/gal
Dicamba 3,6-dichloro-2-methoxybenzioc acid Banvel, Clarity, Overdrive 4 lb/gal
Dicambia:2,4-D (1:3) See dicamba and 2,4-D Weedmaster 4 lb/gal
Diesel fuel oil Refined petroleum fractions Several manufacturers  
Diflufenzopyr:Dicamba 2-(1-[([3,5-difluorophenylamino]carbonyl) hydrazono]ethyl)-3-pyridinecarboxylic acid, sodium salt and See dicamba Overdrive 0.2 lb and 0.5 lb/lb of product
Fluroxypyr 1-methylheptylester:[(4-Amino-3,5- dichloro-6-fluoropyridin-2-yl)oxy] acetic acid Vista 1.5 lbs/gal
Glyphosate N-(phosphonomethyl) glycine Rodeo 5 lb/gal
Glyphosate*** N-(phosphonomethyl) glycine Several manufacturers 4 lb/gal
Glyphosate:2,4-D (1:1 1/4) See Glyphosate and 2,4-D Landmaster 2 1/2 lb/gal
Hexazinone 3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4 (1H,3H)-dione Velpar L 2 lb/gal
Imazamox 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-methoxymethyl)-3-pyridinecarboxylic acid Clearcast 1.0 lb/gal
Imazapic (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-y1]-5-methyl-3-pyridinecarboxylic acid Plateau, Journey 2 lb/gal
Imazapyr (±)-2-[4,5-dihydro-4 methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3- pyridinecarboxylic acid Arsenal, Habitat 2 lb/gal
Metsulfuron methyl 2-[[[[(4-methoxy-6 methyl-1,3,5-triazin-2-yl)-amino] carbonyl] amino] sulfonyl] benzoate Escort XP 60%
Metsulfuron:
Chlorosulfuron (3:1)
See metsulfuron and chlorosulfuron Cimarron Plus 48% metsulfuron
15% chlorosulfuron
Metsulfuron
Dicamba:2,4-D 1:3
See metsulfuron, dicamba and 2,4-D Cimarron Max 60% (Part A) 3.87 lb/gal (Part B)
Paraquat 1,1’-dimethyl-4,4’ bipyridiniumiun Several manufacturers ----
Picloram 4-amino-3,5,6-trichloro-2-pyridinecarbo- xylic acid Tordon 22K** 2 lb/gal
Picloram:2,4-D (1:4) See Picloram and 2,4-D Grazon P+D 2 1/2 lb/gal
Picloram:
Fluroxypyr
See picloram and fluroxypyr Surmount 1.34 lb/gal
Quinclorac 3,7-dichloro-8-quinolinecarboxylic acid Paramount 75%
Sulfometuron methyl 2 [[[[(4,6-dimethyl-2-pyrimidinyl) amino] carbonyl] amino] sulfonyl] benzoate] Oust 75%
Tebuthiuron* N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N’-dimethylurea Spike 20P 20%
Triclopyr [(3,5,6-trichloro-2-pyridinyl)oxy] acetic acid Remedy Ultra, Garlon 4 Ultra, Garlon 3A Ultra 4 lb/gal
3 lb/gal
*Under supervision of U.S. government agencies, Spike 20P may be applied by aerial or ground equipment at lower than recommended rates if partial control is desired.
**Tordon 22K is a restricted use product.
***Glyphosate and 2,4-D are sold under several different trade names and formulations. Check the active ingredient rate on the label to determine the correct product application rate.

For more on this topic, see the following publications:

Brush Control series:
http://aces.nmsu.edu/pubs/_b/#brushcontrol

B-816: Management of Rangelands and Cattle in Drought-Prone Areas of the Southwest
http://aces.nmsu.edu/pubs/_b/b-816/welcome.html

CR-649: Developing a Grazing System for Arid Climates
http://aces.nmsu.edu/pubs/_circulars/cr-649/welcome.html

All Agronomy Publications:
http://aces.nmsu.edu/pubs/_a/

The information given herein is supplied with the understanding that no discrimination is intended and no endorsement by the New Mexico State University Cooperative Extension Service is implied.

To find more resources for your business, home, or family, visit the College of Agricultural, Consumer and Environmental Sciences on the World Wide Web at aces.nmsu.edu

Contents of publications may be freely reproduced for educational purposes. All other rights reserved. For permission to use publications for other purposes, contact pubs@nmsu.edu or the Department of Extension Animal Sciences and Natural Resources at http://aces.nmsu.edu/ces/animal/ or (575) 646-3326.

New Mexico State University is an equal opportunity/affirmative action employer and educator. NMSU and the U.S. Department of Agriculture cooperating.

Revised June 2015