Herbicides to control buckthorn

Trade NameChemical NameConcentrationUse

Ortho Brush-B-Gon

Triclopyr amine

Ready to use - do not dilute

Cut stump

Ferti-Lome Brush Killer and Stump Killer

Triclopyr amine

Ready to use - do not dilute

Cut stump

Garlon 3A, Vastlan

Triclopyr amine

Mix one part Garlon 3A with 3-parts water
(this achieves a 25% solution), for Vastlan consult label

Cut stump

Garlon 4 Ultra, Element 4

Triclopyr ester

  • Cut stump/basal bark: Mix 1-part Garlon 4 with 3-parts bark oil/diluent (this achieves a 25% solution)

  • Foliar spray: Lower concentrations (5% active ingredient) work for foliar spray of seedlings.

Cut stump or foliar spray

Pathfinder II

Triclopyr ester

Ready to use - do not dilute

Cut stump or basal bark

Roundup, Rodeo, Accord, Etc.

Glyphosate

  • Cut stump: Look for at least 25% active ingredient glyphosate for cut-stump treatments. If using Roundup Concentrate you can mix 1-part water with 1 part herbicide to achieve a 50% solution.

  • Foliar spray: Lower concentrations (2% active ingredient) work for foliar spray of seedlings. If using Roundup Concentrate you can mix a 1:50 to 1:20 herbicide:water ratio.

Cut stump or foliar spray