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During the Alliance for Community Trees "ACTrees Day" Annual Meeting in Sacramento, CA, on November 13, 2012, moderator Scott Jamieson led a panel discussion on how local community tree leaders are handling disastrous threats to urban forests, including invasive species, fires, and drought. Speakers included Rob Davis of the City of Denver, Glenda Daniel of Openlands, and Barry Ward of Trees for Houston. Learn more about ACTrees Day at http://ACTrees.org/what-we-do/training-and-conferences/annual-meeting/
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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
DENVER 1875
Colorado Front Range
Denver Parks and Parkways
Denver Mountain Parks
55 Miles West
Evergreen Colorado 9,000 people and 3,500 homes
Fuel Reduc*on
Stand Thinning
Managing Slash
The Dangers of Controlled Burns
Colorado Springs
Waldo Canyon Fire
Mountain Pine Beetle and Fire
Post Fire
Watershed Protec*on
Erosion Control
Restora*on Efforts
Colorado State Forest Service Nursery
Natural Regenera*on
THANKS FROM DENVER
Bugs that Bug Trees: What Openlands TreeKeepers and
other volunteers can do: A presenta?on to
the Alliance for Community Trees
November 13, 2012
Not all insect pests are equal: fall webworm
1/3” to ½” long
1/8” wide
Metallic green
Black eyes
Public Enemy #1: Emerald Ash Borer
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.
Training from Experts: APHIS staff presents to
TreeKeepers
• 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)
Recognizing Signs: Tracks
• Adult beetles • Larvae • D-‐shaped emergence holes • Bark splits with loose bark sloughing
off • S-‐shaped or serpen*ne larval galleries
Visual Survey -‐ Signs
Visible signs: the "D" hole
Cambium damage & bark splizng
Recognizing Signs: Crown die-‐back
Tool #2: Tree Inventories
Tool # 3: Plan*ng Trees to Replace Ashes:
North Park Village Nature Center/Chicago
Tree Plan*ng: Lincoln Park by Montrose Harbor/Chicago
Aqer Tree Plan*ng: Bobolink Woods Natural
Area/Jackson Park
Other pests: Gypsy Moth
TreeKeepers Collec*ng Gypsy
Moth Cadavers
TreeKeepers support Illinois monitoring effort
with Gypsy Moth Traps
Asian Long-‐Horned Beetle: Gone from Chicago but could return
Bag Worms: TreeKeepers
help iden*fy & remove
Our goal: A Healthy Urban Forest