Method for Controlling Buckthorn - Society for Ecological Restoration 2011
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Transcript of Method for Controlling Buckthorn - Society for Ecological Restoration 2011
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The Tall Stump Control Method for Buckthorn
John LampeGreen Shoots, LLC
Saint Paul, MinnesotaApril 2, 2011
THIRD MIDWEST-GREAT LAKES SER CHAPTER MEETINGApril 1 to 3, 2011
University of Illinois Springfield
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Biggest Problems for AverageSmall Woodland Owner
Daunted by the task
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Daunted by Control Methods
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Images from Buckthorn Control Guide Printed with Permission
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Tall Stump MethodCan Help Average Woodland
Owner
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Talk Outline
• Background on family-owned woodland
• Tall stump control method
• Potential advantages– Efficient– Effective – Environmentally sound
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Family Property
• Washington County, Minnesota
• 12.5 acres
• Rolling hills and lakes
• Typical of woodlands in area
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Family Property (con.)
Native Oak savanna
1900s Pasture; heavily eroded
1960s Red and scotch pine planted
1980s Overgrown pine & buckthorn
1990s Early buckthorn control
2000 to today Beginnings of management
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Our Woodland still has lots of “warts.”
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But we are making progress.
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Girdled Aspen
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Creates Nice Snag!
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Three Phases of Tall Stump Control Method
• Preparation
• Cutting the tall stumps
• Treatment
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First Phase - Preparation
Not out-of-the-ordinary:
• Our Forest Management Objectives:– Convert to oak savanna and woodlands– Enhance ecological diversity– Safety – prevent fire, etc.
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Only go after the worst buckthorn.
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Worst Buckthorn – Berries
• mature female– 4 seeds per berry– 400 to 1800 fruits– 1600 to 7200 seeds– Over 5 year period =
• 8,000 to 36,000 seeds
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Ignore the Small Buckthorn!
• Too time consuming
• It’s not just about the buckthorn
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2nd Phase
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Traditional – 2nd Phase
• Pulling
• Girdling
• Foliar
• Basal Bark
• Cut Stump
• Frill (“cut and squirt”)
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2nd phase of the tall stump method only involves
stump cutting
No Treatment Yet
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2nd Phase of Tall Stump: Cutting
• Tools: lopper or hand saw
• Cut trunk high
• Cut big branches
• Leave tall stumps
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Tall Stump
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Tall Stumps Can be
Quite Tall!
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3rd Phase of Tall Stump Method
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3rd Phase: Treatment
• Tools: – Scraping tool– Herbicide applicator
• Frill Method
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Scrape Bark
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Apply Herbicide
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3rd Phase: Treatment (con.)
• Winter – ideal time.
• Glyphosate (20% to 30% concentration).
• Control and treatment can be separated by months
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Advantages of Tall Stump Treatment
Method
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1st Advantage: Efficiency
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Efficient: FewerTools
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Efficient – Split Work Up
• Cutting Tall Stump – springtime
• Treatment – fall or winter
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Efficient because:
If you have a delayed treatment. . .
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• Growth will occur at the top
• And, it’s still easy to treat the tree
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• But at least you don’t have a bush to deal with
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2nd Advantage: Effectiveness
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Cutting Phase in Spring
• After leaf out and flowering
• Weakens the buckthorn
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Sap Flow - Spring
SINK
SINK
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Cutting Removes Sink
Sink
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Frill Mainlines Herbicide
• Frill “mainlines” herbicide into inner bark or phloem
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Sap Is Falling
Herbicide Goesto the Roots
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3rd Advantage: Better for Environment
• No soil disturbance
• Better target surface means less herbicide
• Uses glyphosate – relatively benign
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Green Shoots
• John Lampe
• 651-245-4682 (cell)
• slide presentation on blog: http://invasiveplantnews.com
• Website: www.greenshootsonline.com