emerald ash borer in colorado presented to the highlands ranch metro district board of directors...
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Emerald Ash Borerin Colorado
Presented to the
Highlands Ranch Metro District Board of Directors
March 19, 2014
EAB Quick Facts:
Invasive wood-boring insect
Native to Asia/China
Found in 22 states and 2 Canadian provinces since 2002
Responsible for death of over 300 million U.S. ash trees
EAB was detected in Boulder, CO in 2013
How does EAB kill ash trees?
The larval stage of the insect tunnels through the vascular system of the tree, cutting off the water and nutrient supply to the tree
Symptoms
May not be evident for 2-3 yearsEarly detection is very difficult
Initially attacks along upper trunk and branches - canopy dies back
Succeeding attacks found on main trunk and root flares (much later)
Trees may lose up to 50% of canopy in first few years, die within 5-7 years
Management
Remove less desirable Ash trees and replace with more diverse species
Treat selective Ash trees with trunk injection, trunk spray or soil applications
If left untreated, all Ash trees will succumb to EAB
HRMD Ash Information
Currently 1,861 Ash trees in our inventory (14%)
Average size – 9” diameter
Average value $1,421
Estimated Ash population value: $2.6 million
Private/commercial property Ash population is unknown
Budget Impact
Increased budget for chemicals, contracted services and temporary staff
Staff labor re-directed toward EAB detection, treatment and tree removal
Summary
Emerald Ash Borer (EAB) detected in Colorado
EAB is an invasive pest that will kill all Ash trees if untreated
Treatment and budget plans need to be addressed prior to infestation of EAB
Educating homeowners, HOA’s, HRCA and Shea Homes is important
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