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Address
3198 Broadway
Boulder, CO 80304
303-413-7200

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Insect/Disease/Environmental Problems

The Parks and Recreation Forestry Section actively monitors city trees for insect and disease problems. The Forestry Section has an active Integrated Pest Management program in our city parks and practices each of the IPM controls: prevention, cultural, mechanical, biological and chemical. Chemical control is used as a last resort and only when the life of the tree is threatened. Staff has several park trees chemically treated each year for potentially life threatening insect problems. We do not have a program to treat street trees within the public right-of-way but do allow property owners to contract out this service from qualified arborists with our authorization. Contact the Forestry Section to learn more about the least toxic controls available to treat for insect and disease problems on your city trees.



Insect/Disease/Environmental Problem - Host Tree

 

Aphids
Most deciduous and evergreen tree species

Thousand Cankers Disease
Walnut trees 

Brownheaded Ash Sawfly
Green and White Ash trees

Douglas-fir Tussock Moth
Blue spruce, Douglas-fir or white fir trees

Dutch Elm Disease
American Elm

Elm Leaf Beetle
Siberian and American Elm

European Elm Scale
American Elm

Honeylocust Plant Bug/Leafhoppers
Honeylocust

Honeylocust Spider Mites
Honeylocust

Ips beetle
Blue Spruce

Kermes Scale
Red or Pin Oak trees

Lilac/Ash Borer
Green and white Ash trees

"Lawnmoweritis"
All species

Oystershell Scale
Aspen, green and white Ash

Zimmerman Pine Moth
Austrian, Ponderosa or Scotch pine



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