Bugs, Fire, and Rainless Days - ACTrees Day 2012
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Transcript of Bugs, Fire, and Rainless Days - ACTrees Day 2012
“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