Agricultural Pests

Browse the three categories of agricultural pests. You can find insects, diseases, and agriculturally important weeds.

Insects

Wheat Stem Sawfly

Wheat Stem Sawfly

Wheat Stem Sawfly, Cephus cinctus Norton  The wheat stem sawfly is a prolific pest to wheat in Colorado, causing extensive damage in the eastern parts of the Great Plains.  Order: ...
True Armyworm

True Armyworm

True Armyworm, Mythimna unipuncta  Order: LepidopteraFamily: Noctuidae Description and Lifecycle Armyworm adults are approximately 1.5 inches and a dirty white color with black dots on their ...
Pale Western Cutworm

Pale Western Cutworm

Pale Western Cutworm, Agrotis orthogonia Pale western cutworm is a subterranean cutworm, feeding on stems at the crown. They can be a significant pest in wheat and corn but will feed on a vast ...
Grasshopper

Grasshopper

Grasshopper Control in Gardens and Small Acreage   Over 100 species of grasshoppers occur in Colorado and their populations fluctuate from year to year. They may cause serious damage to yards ...
Black Grass Bugs

Black Grass Bugs

Black Grass Bug Black grass bugs are small, black true bugs that are native to the western rangeland and can cause considerable damage to certain range grasses.  Order: HemipteraFamily: ...
Army Cutworm

Army Cutworm

Army Cutworm, Euxoa auxiliaris  Army cutworm adults are commonly known as miller moths and become a household nuisance following outbreaks. During outbreak years they can cause extensive damage ...
Aphids in Alfalfa

Aphids in Alfalfa

Aphids in Alfalfa Pea aphid, blue alfalfa aphid, cowpea aphid, and spotted alfalfa aphid are most common in alfalfa in Colorado.  Order: HemipteraFamily: Aphididae Description and ...
Alfalfa Weevil

Alfalfa Weevil

Alfalfa Weevil, Hypera postica  Alfalfa weevil is the most important insect pest of alfalfa in Colorado.  Order: ColeopteraFamily: Curculionidae Description and Lifecycle   Adult ...

Diseases

Wheat Disease Newsletter June 21, 2022

COLORADO WHEAT DISEASE NEWSLETTER June 21, 2022 DISEASE OBSERVATIONS No disease observations have been made at this time. Many fields in the northeast part of the state are still emerging and ...
Wheat Disease Newsletter June 6, 2022

Wheat Disease Newsletter June 6, 2022

COLORADO WHEAT DISEASE NEWSLETTER June 6, 2022 DISEASE OBSERVATIONS Reports of mosaic virus symptoms have increased this past week, with moderate levels reported in symptomatic fields. All of ...
Wheat Disease Newsletter May 23, 2022

Wheat Disease Newsletter May 23, 2022

COLORADO WHEAT DISEASE NEWSLETTER May 23, 2022 DISEASE OBSERVATIONS We have gotten a few reports of mosaic virus symptoms, and samples from three different locations in Sedgwick county have ...
Wheat Disease Newsletter April 25, 2022

Wheat Disease Newsletter April 25, 2022

COLORADO WHEAT DISEASE NEWSLETTER April 25, 2022 DISEASE OBSERVATIONS There is one report of virus-like symptoms in Sedgwick County. A neighboring plot had lots of volunteer wheat that likely ...
Wheat Disease Newsletter April 11, 2022

Wheat Disease Newsletter April 11, 2022

COLORADO WHEAT DISEASE NEWSLETTER April 25, 2022 INTRODUCTION Welcome to a new season of the Wheat Disease Newsletters! My name is Robyn Roberts and I joined Colorado State University in August ...

Weeds

Kochia

Kochia

Kochia Bassia scoparia L.Formerly Kochia scopariaAlso known as:Burning bush, mock-cypress, Mexican firebush, Mexican fireweed. This content is an excerpt from the Getting Rid of Weeds Through ...