Contact your local county Extension office through our County Office List.

   
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Insects

 

Overview

Colorado is home to many species of insects ranging from beneficial to harmful. Extension has resources to help identify insects and appropriate control measures. Topics in this section include: Exotic (Non-established in Colorado), Field & Forage Crop, Fruit, Flower & Vegetable Garden, General Insect Control, General Interest Subjects/Miscellaneous, Household, Stinging & Biting, Trees & Shrubs and Turfgrass insects.

  • Emerald Ash Borer Resources
    Resources to help assess your trees, FAQs, identification and other helpful information regarding this new pest.
  • Pest Alerts
    Pests and diseases affect animals, plants, and humans. Some active pests are highlighted which include: Elm Flea Weevil, Walnut Twig Beetle and Thousand Cankers Disease of Black Walnut, Pheromone Traps are up to monitor Bugs and Russian wheat aphids and alfalfa weevil.
  • Insect Calendars
    Monthly insect problems throughout the state including: Arapahoe, Douglas & Elbert Counties; Denver, Adams & Boulder Counties; Eastern Plains Counties; High Country Counties; Jefferson & Park Counties; Pueblo & Fremont Counties; Tri-River Counties; and Weld, Larimer & Cheyenne Counties

Publications


CSU Extension has several publications related to insects. Topics in this section include:

Exotic (Non-established in Colorado)

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Field & Forage Crop

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Fruit, Flower & Vegetable Garden

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General Insect Control

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General Interest Subjects/Miscellaneous

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Household

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Stinging & Biting

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Trees & Shrubs

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Turfgrass

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Hot Topics

News

Hot Topics

Emerald Ash Borer
Emerald Ash Borer Resources
Resources to help assess your trees, FAQs, identification and other helpful information regarding this new pest. Learn more
Japanese Beetle
Japanese Beetle
Japanese beetle adults chew flower blossoms and leaves of many commonly grown plants. Learn more
Grasshopper Control in Gardens and Small Acreages
Grasshopper Control in Gardens and Small Acreages
Grasshoppers are the most difficult insect to control because they are highly mobile. Learn more
Leafcutter Bees
Leafcutter Bees
Leafcutter bees are not aggressive and have a mild sting that is used only when they are handled. Learn more

Programs

Insect Featured Programs

dragonfly
Bioagricultural Sciences & Pest Management Extension Entomology Resource Site
New website developed by the Extension Entomology team. Learn more
High Plains Integrated Pest Management
High Plains Pest Management
Integrated Pest Management Guide for Colorado, Western Nebraska, Wyoming, Montana and Western South Dakota. Learn more
Raspberry with insects
Western Colorado Entomology
Current insect alerts, information and courses for western Colorado. Learn more
Northern Colorado Pest alert
The Northeast CO Pest Alert Program
Monitoring field crop pests in Adams, Arapahoe, Boulder, Kit Carson, Logan, Phillips, Yuma, Sedgwick, Washington and Weld and neighboring counties. Learn more

Websites