Western Colorado Insects

Welcome to the Colorado State University Extension Western Colorado Entomology web site. This site was created and is maintained by Tri River Area Extension Entomology & Agronomy, and is dedicated to presenting factual information on the insects and insect related issues affecting western Colorado.

Entomology Alerts!

Africanized Honey Bees

in Mesa County

Brown Marmorated Stink Bug

This non-native pest was recently found in Mesa County. The fact sheets and links below give more information about this invader.

Brown Marmorated Stink Bug

Other Links
Click the icons and links to visit websites dedicated to education and control of the Brown Marmorated Stink Bug.

ARS Works Toward Control of
Brown Marmorated Stink Bug

ARS Electronic Information Kit

Intermountain Forage and Legume Production Manual
2nd Edition

Forage Manual Cover

Available for purchase at the
Mesa County TRA Extension Office,
The Intermountain Grass and Legume Forage Production Manual is now available online in PDF format. Individual chapters are available for download.

This page was updated on May 11, 2014

What's New

*Recent Additions*

2015 WCPMW

Feb. 18-19, 2015
Montrose Pavillion in Montrose, CO

The Tri River Area Pest Management Workshop is now the Western Colorado Pest Management Workshop.


Past Workshops

2014 TRA PMW

2013 TRA PMW

2012 TRA PMW

2011 TRA PMW


March 14th
Master Gardener Vegetable Garden Presentation Notes


  • View the Swarm List for beekeepers in your area that collect and remove unwanted bees (To be added or removed from the Swarm List e-mail Bob Hammon)

Grape Seed Chalcid Poster Thumbnail
Grape Seed ChalcidĀ poster presented at Entomological Society of. America Annual meeting, 13 Nov 2013, Austin TX

Spotted Wing Drosophila in Colorado!

Spotted Wing Drosophila (Drosophila suzukii), a newly arrived exotic pest of small fruits, stone fruits, melons, tomatoes and other soft fleshed fruits has been found on the front range near Ft. Collins. SWD was first found in the US in 2008 and has since spread to many states and northward into Canada. It has not been detected in western Colorado. For more information visit our spotted wing drosophila page.
Photo by Ed Show

Other Useful Links

Arthropods of Colorado
Bugwood-High Plains IPM
Bugwood Main Page
CDMS-Pesticide Labels
Upper Grand Valley Pest Control District

Home Use
Pesticide Labels

Bayer Advanced
Fertilome, Hi-Yield,
Natural Guard, VPG