General Information


Solix 3 herbicide is recommended for selective, postemergence control of broadleaf weeds and select woody brush species in asparagus, barley, oats and wheat not underseeded with a legume, canola, Christmas tree plantations, fallow cropland, field corn, garden beet, grasses grown for seed, mint (spearmint and peppermint), popcorn, spinach, stone fruits, sugar beet, sweet corn, turnip, cottonwood/poplar and eucalyptus tree plantations, rangeland and permanent grass pastures, conservation reserve program (CRP) acres, and non-cropland areas including fence rows, around farm buildings, equipment pathways, industrial manufacturing and storage sites, forest sites, and rights-of-way (such as along roadsides, electrical lines and railroads). Use on these sites may include application to grazed areas as well as establishment and maintenance of wildlife openings, wild parkland and wildlife management areas, and forest spot application adjacent to these sites.


- Use directions in Makhteshim Agan of North America, Inc. supplemental labeling may supersede directions or limitations in the labeling.

- In California, the maximum application rate for Solix 3 is 2/3 pint per acre per growing season. Do not exceed a cumulative amount of 2/3 pint (0.25 lb. active ingredient (a.i.)) of clopyralid per acre per crop year.

- Do not contaminate irrigation ditches or water used for irrigation or domestic purposes.

- Solix 3 may be applied by aircraft on the following crops: spinach, canola (rapeseed), crambe and sugar beets. Do not apply Solix 3 by aircraft to other crops unless otherwise permitted by Makhteshim Agan of North America, Inc. supplemental labeling or product bulletins.

- Do not use in greenhouses.

- Chemigation: Do not apply this product through any type of irrigation system.

- Re-treatment is allowed, but do not apply more than the maximum allowable rate per crop growing season. An application to fallow cropland preceding or following an application to dryland small grains (wheat, barley or oats) is allowed, but is not allowed preceding or following an application to irrigated small grains.

- Do not transfer livestock from treated grazing areas (or feeding of treated hay) to sensitive broadleaf crop areas without first allowing 7 days of grazing on an untreated pasture (or feeding of treated hay). If livestock are transferred within less than 7 days of grazing untreated pasture or eating untreated hay, urine and manure may contain enough clopyralid to cause injury to sensitive broadleaf plants.

- Field Bioassay Instructions: In fields previously treated with this product, plant short test rows of the intended rotational crop across the original direction of application. The test area should sample field conditions such as soil texture, soil pH, drainage, and any other variable that could affect the seed bed of the new crop. The field bioassay can be initiated at any time between harvest of the treated crop and the planting of the rotational crop. Observe the test crop for herbicidal activity such as poor stand (effect on seed germination), chlorosis (yellowing), and necrosis (dead leaves or shoots), or stunting (reduced growth). If herbicidal symptoms do not occur, the test crop can be grown. If there is apparent herbicidal activity, do not plant the field to the test rotational crop; plant only a labeled crop or crop listed in the table above for which the rotational interval has clearly been met.

- In Arizona: The state of Arizona has not approved Solix 3 for use on plants grown for agricultural/commercial production such as on designated grazing areas.

- Use of this product in Oregon is limited to the sites stated on the label which are agricultural, forest and right-of-way.

- In Florida, Solix 3 can be used only in the following counties: Bay, Bradford, Calhoun, Escambia, Franklin, Gadsden, Gulf, Hamilton, Jackson, Jefferson, Lafayette, Leon, Liberty, Madison, Okaloosa, Santa Rosa, Suwanee, Taylor, Wakulla, Walton and Washington.

- Rotation to Broadleaf Crops: Do not plant broadleaf crops in treated areas until an adequately sensitive bioassay shows that no detectable clopyralid is present in the soil.

- Grazing/Haying: There are no restrictions on grazing or hay harvest following application of Solix 3 at labeled rates.

- Some desirable broadleaf plants (forbs) are susceptible to Solix 3. Do not spray pastures containing desirable forbs, especially legumes, unless injury can be tolerated. However, the stand and growth of established perennial grasses is usually improved after treatment, especially if rainfall is adequate for active plant growth and grazing is deferred.

- Grasses are tolerant to Solix 3, but new grass seedlings may be injured to varying degrees until well established as evidenced by development of secondary roots and tillering (multiple stems).

- Do not use hay or straw from treated areas for composting or mulching on susceptible broadleaf crops.


Application Timing:

Apply to actively growing weeds. Extreme growing conditions such as drought or near-freezing temperatures prior to, at, and following time of application may reduce weed control and increase the risk of crop injury at all stages of growth. Only weeds that have emerged at the time of application will be affected. If foliage is wet at the time of application, control may be decreased. The treatment with Solix 3 will be rainfast within 6 hours after application.

Application Rates:

Generally, application rates at the lower end of the recommended rate range will be satisfactory for young, succulent growth of susceptible weed species. For less sensitive species, perennials, and under conditions where control is more difficult (plant stress conditions such as drought or extreme temperatures, dense weed stands and/or large weeds), the higher rates within the rate range will be needed.

Weeds in fallow land or other areas where competition from crops is not present will generally require higher rates for control or suppression.

Spray Coverage:

Use sufficient spray volume to provide thorough coverage and a uniform spray pattern. Do not broadcast apply in less than 2 gallons of total spray volume per acre. For best results and to minimize spray drift, apply in a spray volume of 10 or more gallons per acre. As vegetative canopy and weed density increase, spray volume should be increased to obtain equivalent weed control. Use only nozzle types and spray equipment designed for herbicide application. To reduce spray drift, follow precautions under Avoiding Injury to Non-Target Plants.

Spot Treatments:

To prevent misapplication, spot treatments should be applied with a calibrated boom or with hand sprayers according to directions provided in the label.

Hand-Held Sprayers:

Hand-held sprayers may be used for spot applications of Solix 3 if care is taken to apply the spray uniformly and at a rate equivalent to a broadcast application. Application rates in the table are based on an area of 1000 sq. ft. Mix the amount of Solix 3 (fl. oz. or mL) corresponding to the desired broadcast rate in one or more gallons of spray. To calculate the amount of Solix 3 required for larger areas, multiply the table value (fl. oz. or mL) by the area to be treated in “thousands” of square feet, e.g., if the area to be treated is 3500 sq. ft., multiply the table value by 3.5 (calc. 3500/1000 = 3.5). An area of 1000 sq. ft. is approximately 10.5 X 10.5 yards (strides) in size.

Refer in the label regarding tank mix information.

Weeds Controlled

Broadleaf Weeds Controlled: See Guidelines for Control of Specific Weeds for additional information on application timing and application rates.

Buffalobur, Knapweed Russian, Ladysthumb, Sowthistle Perennial, Smartweed Green: These weeds may only be suppressed. Suppression is a visual reduction in weed competition (reduced population or vigor) as compared to untreated areas. The degree and duration of weed control will vary with weed size and density, application rate and coverage, and growing conditions before, during, and after the time of treatment. For perennial weeds such as Russian knapweed and perennial sowthistle, Solix 3 will control the top growth and inhibit regrowth during the season of application (season-long control). At higher use rates shown on the label, Solix 3 may cause a reduction in shoot regrowth in the season following application; however, plant response may be inconsistent due to inherent variability in shoot regrowth from perennial root systems.

Wormwood Biennial: Not approved for use in California.

Mesquite: Not For Use in California

Limitations, Restrictions, and Exceptions


For the control of mesquite and certain associated woody species on rangeland and permanent grass pastures only in Arizona, New Mexico, Oklahoma and Texas.

Solix 3 will control mesquite and certain associated woody species, such as catclaw acacia and twisted acacia, on rangeland and permanent grass pastures in Arizona, New Mexico, Oklahoma and Texas. Very small amounts of this product can kill or injure sensitive broadleaf plants. To prevent accidental damage to crops and other desirable plants, follow all directions and precautions. This product affects plants directly through foliage and indirectly by root uptake from treated soil.

Removal of Woody Plants Following Treatment:

To maximize woody plant control, do not disturb treated plants or remove by mechanical means or by fire for at least 1 year after application.


There are no restrictions on grazing of treated areas following application of Solix 3 at labeled rates. Hay harvest is not considered to be feasible for at least 1 year following application of Solix 3 because of standing woody plants.

Do not spray pastures if injury to existing forage legumes or other desirable broadleaf plants cannot be tolerated. Solix 3 may injure or kill legume and certain other broadleaf plants. However, the stand and growth of established perennial grasses is usually improved after spraying, especially when rainfall is adequate and grazing is deferred.

Timing and Factors in Control:

The herbicidal response of mesquite is strongly influenced by foliage condition, stage of growth and environmental conditions.

For best results, apply when new growth foliage has turned from light to dark green, when the soil temperature is above 75°F at a depth of 12 to 18 inches, and soil moisture is adequate for plant growth. Application should be made within 60 days after the 75°F minimum soil temperature at the 12- to 18-inch depth has been reached. Product performance may be adversely affected if application is made before mesquite foliage has turned from light to dark green or if foliage has been injured or removed by late frost, insects, hail or plant diseases. Do not treat if mesquite exhibits new (light green) terminal growth in response to recent heavy rainfall during the growing season. Rate of soil warm-up at the 12- to 18-inch depth may vary with soil texture and drainage. Coarse-textured (sandy) soils warm up sooner than fine-textured (clay) soils and dry soils warm up more quickly than wet soils.

The herbicidal symptoms of mesquite treated with Solix 3 are often different from those resulting from application of other herbicides. In some years, complete brownout and leaf drop of treated mesquite may be delayed and not occur before the first frost. Other herbicidal symptoms often observed could include discoloration and rupture and/or “bleeding” of bark on branches and trunks. Reapplication during the same growing season is not recommended. Re-treatment will not be effective until woody plants have developed sufficient new foliage to intercept the spray and provide uptake adequate to control the plant when translocated to the root system. Following mechanical removal, regrowth mesquite should be at least 4 feet tall before application of Solix 3.

Control of rangeland brush or weeds may be unsatisfactory under adverse growing conditions such as severe drought stress.

Broadcast Ground or Aerial Application:

Use Solix 3 alone or in combination with Remedy herbicide or Tordon 22K herbicide as recommended in the table below. See the General Information section for additional information.

Specific Use Recommendations

See Timing and Factors in Control section for information on treatment of mesquite. Apply as a water spray or oilwater emulsion (see Mixing Instructions) in a total spray volume of 4 or more gallons per acre by air or 10 or more gallons per acre by ground application using higher spray volumes with increasing brush density and height.

Note: Where control of pricklypear cactus is desired, the tank mixture of Solix 3 and Tordon 22K should be used.

Restricted Entry Interval

12 hours