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<br />l::luckthom: What you can do! - Invasive species: Minnesota DNR <br /> <br />Page 2 of3 <br /> <br />stumps you have sprayed. Colored flags can also help mark cut stumps. When <br />buckthorn is cut, the stumps are easily covered and lost under cut brush. <br /> <br />For basal stem treatment, a method that applies chemical through the bark, low <br />volume spray applications can be made with Garlon 4 and similar oil-based products. <br />This application method uses Triclopyr ester mixed with an oil diluent ( i.e. Bark Oil <br />Blue, kerosene or diesel oil) applied directly to the bark of buckthorn from the root <br />collar up about 12-18 inches. This treatment works best on stems less than 2-3 inches <br />in diameter. An ultra low volume spray wand should be used to minimize herbicide <br />use and reduce the potential for non-target injury. Buckthorn treated in this fashion <br />can be left standing or cut at a later date. <br /> <br />Note: Buckthorn seeds in the soil can <br />remain viable for up to five years. Follow- <br />up control of seedlings that emerge after <br />Initial control efforts is important on all <br />sites. With no fOllow-up control, buckthorn <br />will come back. Fire offers a long-term <br />management option in grassland or <br />savanna cover-types. Burning will need to <br />be done every two to three years. If <br />burning is not an option, a follow up <br />treatment of the seedlings (pulling or <br />spraying) is needed. <br /> <br />After buckthorn control, many sites may <br />require replanting of desirable tree, shrub, <br />and herbaceous species. A resource that may help you to find the right plants for your <br />location is a multimedia CD program called Restore Your Shore. <br /> <br /> <br />Herbicides to Control Buckthorn <br />Trade Name Chemical Concentration Use <br />Name <br />Ortho Brush-B-Gon Triciopyr Premixed at 8% Cut stump <br />amine <br />Ferti-Lome Brush Killer and Triciopyr Premixed at 8.8% Cut stump <br />Stump Killer amine <br />Garlon 3A Triciopyr 25-50% solution with water Cut stump <br />amine <br />Garlon 4 Triciopyr ester 1 part Garlon 4 and 3 parts Cut stump or <br />bark oil/diluent basal bark <br />Roundup, Rodeo, Accord, Glyphosate 25-50% solution with water Cut stump <br />Etc. <br /> <br />Always read and follow the instructions and precautions on the herbicide label. <br />Reference to chemical brand names in this column does not imply endorsement of those <br /> <br />h IIp:/ /www.dnr.state.mn.us/invasives/tcrrestrialplants/woody/buckthorn/control.htm I <br /> <br />5/29/2009 <br />