Garlon™ RTU

Why Use Garlon™ RTU?

Ready to Use. Requires no mixing for single stem appications.

Packaging. Garlon™ RTU comes in an innovative Jerribox which is easy to pour and eliminates the need for traditional jug disposal. 

Year Round. Ability to use any time throughout the year if plants are dry.

Low Impact. Ideal fit for basal bark and stump treatment programs for electrical utility and forestry managers.


Garlon RTU is registered to control the following:

  • Alder
  • Ash
  • Aspen
  • Basswood
  • Beech
  • Birch
  • Blackberry
  • Buckthorn
  • Cherry†
  • Chokecherry†
  • Cottonwood
  • Dogwoods
  • Elderberry
  • Elm†
  • Hawthorn
  • Hickory
  • Hop-hornbeam
  • Honey locust†
  • Locust
  • Maples
  • Mulberry
  • Oaks†
  • Pines†
  • Poplar
  • Red maple†
  • Sassafras
  • Sumac
  • Sycamore
  • Tamarack
  • Wild rose
  • Willow
  • Witchhazel

†These species may need to be retreated the following year.

Rates and Packaging

  • Garlon RTU is packaged in 13 L jerriboxes and can be added directly to back pack sprayers.
  • It is formulated to be used right out of the container. No mixing is required
  • Garlon RTU is designed for selective, direct stem application to woody species.

Application Methods


  • This has proven to be the fastest and most effective method of selective basal bark application. Best results are on young, actively growing stems less than 8 cm in diameter.
  • Achieving complete wrap of the solution around the entire stem circumference is essential to effectiveness.
  • Spray 30 to 50 cm above ground level:
    • For stems less than 8 cm basal diameter, spray a band 5 cm wide on one side of each stem.
    • For stems 8 to 15 cm basal diameter, spray a band 5 cm wide on two sides of each stem (Two-sided Streamline).
  • With sufficient volume, the treated zone should widen to encircle the entire stem circumference within 30 minutes.

Cut Stump

  • This method is excellent for prevention of re-sprouting. It also reduces the need for repeated cutting of large diameter stumps of species that sprout from the base or sucker from roots. Applications may be made to both old and freshly cut stumps.
  • Thoroughly wet the stump, including:
    • Cut surfaces, especially the cambium layer just inside the bark.
    • The remaining bark to the ground line, including the root collar

When to Apply

  • Optimal results are achieved when applications are made to young vigorously growing stems which have not developed the thicker bark characteristic of slower growing older trees.
  • For best results, apply when stem and bark are dry.
  • Garlon RTU can be applied at any time, including the winter months, except when snow or water prevents spraying at the ground line

Packaging Disposal

  • Garlon RTU containers should not be reused for any purpose. For disposal, this empty container may be returned to Univar as per their instructions.
  • If the cardboard shows no sign of pesticide contamination, remove the plastic bag inserts and recycle the cardboard box locally. Collect empty plastic bags together and do not triple rinse.
  • Return the plastic bag inserts or the whole package to Univar as per their instructions by contacting a Univar representative at one of the following toll free numbers: Western Canada 1-866-572-8240; Eastern Canada 1-877-940-4338.

Optimizing Performance

Free water on stems resulting from melting frost, wet snow or rain, causes emulsification and failure to penetrate bark during streamline and stump treatments. Emulsified herbicide can run down the treated stem like water, showing no evidence of "wrap". If no emulsification occurs (dry frost), then the solution is working. If the oil solution does not penetrate the frost (ice), shut down the application. Watch for frost as temperature rises above 0° C and moisture appears on stems.

    • Keep application pressure low to prevent vapour drift. Small quantities of vapour drift, which may not be visible, can seriously injure susceptible plants and sensitive non-target vegetation.
    • If no emulsification occurs (dry frost), then the solution is working. If the oil solution does not penetrate the frost (ice), shut down the applications. Watch for frost as temperature rises above 0oC and moisture appears on stems.
  • RAIN
    • Basal bark and cut stump applications cannot be made to wet stumps or emulsification may occur and the target trees will not be controlled. However, rain immediately after an application will not affect the efficacy of the product as it will have already entered the bark.
  • SNOW
    • When snow prevents access to ground line at the base of target trees, one-sided application should be stopped. Two-sided Streamline application should be used on larger stems to assure wrap.
    • Garlon RTU can be applied at temperatures below -10°C, any time throughout the year. However, if temperature drop too low, applicators need to stop operations if coagulation begins to occur.


There is no restriction on livestock grazing treated areas

Legal Requirements
Always read the product label before making applications