Bugs, Fire, and Rainless Days - ACTrees Day 2012
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Transcript of Bugs, Fire, and Rainless Days - ACTrees Day 2012
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“Bugs, Fire and Rainless Days”
Moderator ScoE Jamieson, ACTrees Vice President, Bartle- Tree Experts Vice President
• Rob Davis, Denver City Forester, Denver, CO • Glenda Daniel, Associate Director, Openlands, Chicago, IL • Barry Ward, Execu*ve Director, Trees for Houston, Houston, TX
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DENVER 1875
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Colorado Front Range
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Denver Parks and Parkways
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Denver Mountain Parks
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55 Miles West
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Evergreen Colorado 9,000 people and 3,500 homes
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Fuel Reduc*on
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Stand Thinning
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Managing Slash
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The Dangers of Controlled Burns
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Colorado Springs
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Waldo Canyon Fire
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Mountain Pine Beetle and Fire
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Post Fire
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Watershed Protec*on
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Erosion Control
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Restora*on Efforts
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Colorado State Forest Service Nursery
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Natural Regenera*on
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THANKS FROM DENVER
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Bugs that Bug Trees: What Openlands TreeKeepers and
other volunteers can do: A presenta?on to
the Alliance for Community Trees
November 13, 2012
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Not all insect pests are equal: fall webworm
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1/3” to ½” long
1/8” wide
Metallic green
Black eyes
Public Enemy #1: Emerald Ash Borer
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Tools in Our Toolbox
• Learning to recognize the signs of infesta*on-‐-‐gezng training from experts
• Tree inventories to locate ash trees in areas of high infesta*on-‐-‐to help public agency long-‐term planning
• Plan*ng new trees where ashes are likely to come down in the next few years.
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Training from Experts: APHIS staff presents to
TreeKeepers
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• Aqer hatching, larvae bore through bark to feed on the trees' vascular *ssue.
• Growing larvae zigzag through this delicate *ssue as they feed, forming S-‐shaped tunnels that are flat and wide.
• Mature larvae are about 1 inch long; they are creamy white, flat, and have “bell” shaped segments.
• Larvae spend the winter under bark.
Recognizing signs: EAB Life Cycle -‐ Larvae
Three different stages of EAB larvae. (D. Cappaert, MSU)
Larval EAB feeding on an ash tree's vascular ?ssue. (J. Ellis, Purdue University)
S-‐shaped feeding galleries under ash bark. (Ed Czerwinski, Ontario Ministry of Natural Resources)
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Recognizing Signs: Tracks
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• Adult beetles • Larvae • D-‐shaped emergence holes • Bark splits with loose bark sloughing
off • S-‐shaped or serpen*ne larval galleries
Visual Survey -‐ Signs
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Visible signs: the "D" hole
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Cambium damage & bark splizng
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Recognizing Signs: Crown die-‐back
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Tool #2: Tree Inventories
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Tool # 3: Plan*ng Trees to Replace Ashes:
North Park Village Nature Center/Chicago
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Tree Plan*ng: Lincoln Park by Montrose Harbor/Chicago
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Aqer Tree Plan*ng: Bobolink Woods Natural
Area/Jackson Park
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Other pests: Gypsy Moth
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TreeKeepers Collec*ng Gypsy
Moth Cadavers
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TreeKeepers support Illinois monitoring effort
with Gypsy Moth Traps
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Asian Long-‐Horned Beetle: Gone from Chicago but could return
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Bag Worms: TreeKeepers
help iden*fy & remove
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Our goal: A Healthy Urban Forest