General Information


Triclopyr 3SL herbicide is used to control unwanted woody plants, aquatic plants and annual and perennial broadleaf weeds:

- in forests

- in non-crop areas including industrial manufacturing and storage sites

- in rights-of-way such as electrical power lines, communication lines, pipelines, roadsides, and railroads

- in fence rows

- in non-irrigation ditch banks

- around farm buildings

- on Christmas tree plantations

- on wetland sites in production forests and industrial non-crop areas in aquatic sites such as ponds, lakes, reservoirs, non-irrigation canals, and ditches which have little or no continuous outflow

- on rice Triclopyr 3SL use on these sites may include application to grazed areas as well as for the establishment and maintenance of wildlife openings.


- Obtain required permits: Consult with appropriate state or local water authorities before applying this product to public waters. State or local public agencies may require permits.

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

- Do not apply to ditches or canals used to transport irrigation water. It is permissible to treat non-irrigation ditch banks.

- Do not apply where runoff or irrigation water may flow onto agricultural land other than rice fields as injury to crops may result.

- It is permissible to treat non-irrigation ditch banks, seasonally dry wetlands (such as flood plains, deltas, marshes, swamps, or bogs), and transitional areas between upland and lowland sites.

- Do not apply directly to unimpounded rivers or streams.

- Do not apply to salt water bays or estuaries.

- When making application to banks or shorelines of moving water sites, minimize overspray to open water.

- Application through a mist blower is not recommended.

- Do not make direct applications or allow spray mists to drift onto cotton; grapes; soybeans; tobacco; vegetable crops; flowers; ornamental shrubs or trees; or other desirable broadleaf plants.

- For range and pasture sites including rights-of-ways, fence rows, or any area where grazing and harvesting is allowed, do not apply more than 2 lb a.i. of triclopyr (2/3 gallon of Triclopyr 3SL) per acre per year.

- For forestry uses, do not apply more than 6 lb a.i. of triclopyr (2 gallons of Triclopyr 3SL) per acre per year.

- For all terrestrial uses other than rangeland, pasture, forestry sites, and grazed areas, a maximum of 9 lb a.i. of triclopyr (3 gallons of Triclopyr 3SL) per acre per year may be applied.

- All livestock, except lactating dairy animals, can graze at any time.

- Lactating dairy animals cannot graze forage until the next growing season after application.

- For all livestock, wait 14 days after application before harvesting hay.

- Grazed areas of non-cropland and forestry sites may be spot treated if they comprise no more than 10% of the total grazable area.

- Withdraw livestock from grazing treated grass or consumption of treated hay at least 3 days before slaughter.

- Arizona: Triclopyr 3SL has not been approved for use on plants grown for commercial production, specifically forests grown for commercial timber production or on designated grazing areas.



Aerial Application: When making aerial applications on rights-of-way or other areas near susceptible crops, apply through a Microfoil or Thru-Valve boom or use an agriculturally approved drift control agent. Other drift reducing systems or thickened sprays prepared by using high viscosity inverting systems may be used if they are made as drift-free as are mixtures containing agriculturally approved thickening agents or applications made with the Microfoil or Thru-Valve boom. Keep spray pressures low enough to provide coarse spray droplets. Spray boom should be no longer than 3/4 of the rotor length. Spray only when the wind velocity is low (follow state regulations). Avoid application during air inversions. If a spray thickening agent is used, follow all use recommendations and precautions on the product label.

Ground Application: To aid in reducing spray drift, Triclopyr 3SL should be applied in thickened (high viscosity) spray mixtures using an agriculturally approved drift control additive, high viscosity invert system, or equivalent, as directed by the manufacturer. Use of low pressure nozzles and operating nozzles in the lower end of the manufacturer’s recommendations is advised. To minimize drift, keep the spray boom as low as possible, apply in > 20 gallons of spray volume per acre, spray when wind velocities are low; or use an approved drift control agent.

In Hand Gun Applications: Select the minimum spray pressure that will provide adequate plant coverage (without forming a mist). Do not apply with nozzles that produce a fine droplet spray.

High Volume Leaf-Stem Treatment: To minimize spray drift, do not use pressure exceeding 50 PSI at the spray nozzle and keep sprays no higher than brush tops. An agriculturally approved thickening agent may be used to reduce spray drift.


Apply Triclopyr 3SL at rates of 0.25 to 3 gallons per acre for the control of broadleaf weeds and woody plants. Apply rate in enough water to provide uniform and complete coverage of the plants to be controlled. Use only water suitable for spraying. Use of an agriculturally approved nonionic surfactant is recommended for all foliar applications. For best results, make applications when woody plants and weeds are actively growing.

Use higher rates within the range when brush averages 15 feet or more in height or when brush covers > 60% of the area to be treated. Resprouting may occur the year following treatment if lower rates are used on hard-to-control species. When easy-to-control brush species dominate, rates below those recommended may be effective. Consult State or Local Extension personnel for information.

For hard-to-control species such as ash, black gum, choke cherry, elm, maples, oaks, pines, or winged elm; during late summer applications when plants are mature; or during drought conditions; use higher rates of Triclopyr 3SL alone or use in combination with Tordon 101 Mixture. If lower rates are used on hard-to-control species, resprouting may occur in the year following treatment.

When applying Triclopyr 3SL in a tank mix with 2, 4-D 3.8 lb amine, like DMA 4 IVM, or low volatile ester herbicides, use higher rates of Triclopyr 3SL for satisfactory brush control.

When tank mixing, refer to the individual product labels for precautionary statements, restrictions, recommended rates, approved uses, and a list of weeds and woody plants controlled.

See label for Tankmix application instruction information.

Limitations, Restrictions, and Exceptions


For broadcast applications, apply the recommended rate of Triclopyr 3SL in 10 to 25 gallons per acre by air or in 10 to 100 gallons per acre by ground. Use sufficient spray volumes to provide thorough plant coverage. To improve spray coverage at volumes less than 50 gallons per acre, add an agriculturally approved nonionic surfactant. See the SPRAY ADDITIVES section of APPLICATION DIRECTIONS. Use application systems designed to prevent spray drift to off-target sites. Nozzles or additives used for drift minimization that produce larger droplets may require higher spray volumes to provide brush control. See APPLICATION EQUIPMENT AND TECHNIQUES section.

Directed Spray Applications for Conifer Release

To release conifers from competing hardwoods such as red maple, sugar maple, striped maple, sweetgum, red and white oaks, ash, hickory, alder, birch, aspen, and pin cherry, mix 1 to 2 gallons of Triclopyr 3SL in enough water to make 100 gallons of spray mixture. To improve spray coverage, add an agriculturally approved nonionic surfactant.

Direct the spray onto foliage of competitive hardwoods using knapsack or backpack sprayers with flat fan nozzles or equivalent. Make applications anytime after the hardwoods have reached full leaf size, but before autumn coloration. The majority of treated hardwoods should be less than 6 feet in height to ensure adequate spray coverage. Care should be taken to direct the spray solution away from conifer foliage, particularly foliage of desirable pines.

Conifer Release Applications: Spray may cause temporary damage and growth suppression of conifers where direct contact occurs; however, injured conifers should recover and grow normally. Over-the-top spray applications can kill pines.

Restricted Entry Interval

48 hours