Agricultural Pests

Agricultural Insects

Wheat stem sawfly

Wheat stem sawfly, Cephus cinctus Norton Order: HymenopteraFamily: Cephidae Description The wheat stem sawfly is a prolific pest to wheat in Colorado, causing extensive damage in the eastern ...

Wheat curl mite

Wheat curl mite, Aceria tosichella Order: AcariFamily: Eriophyidae Description Wheat curl mites are white, cigar-shaped arthropods whose bodies taper near the head and rear. All eriophyid mites ...

Sunflower headclipping weevil

Sunflower headclipping weevil, Haplorhynchites aeneus Order: ColeopteraFamily: Attelabidae Description Adults of sunflower headclipping weevil (Haplorhynchites aeneus) are shiny, black, and ...

Stalk borers in corn

Stalk borers in corn Order: LepidopteraFamily: Crambidae Description European corn borer (Ostrinia nubilalis) European corn borer is native to Europe and an introduced species in North America ...

Spider mites in wheat and corn

Spider mites in wheat and corn Order: AcariFamily: Tetranychidae Description and life history Brown wheat mite (Petrobia latens) In Colorado, brown wheat mites are most active on drought ...

Pale western cutworm

Pale western cutworm, Agrotis orthogonia Order: LepidopteraFamily: Noctuidae Description Adult moths are light gray and have a wingspan of about 3.8 cm (1.5 inches). The forewings have a white ...

Grasshoppers in gardens and small acreage

Grasshoppers in Gardens and Small Acreage Order: OrthopteraFamily: Acrididae Grasshoppers are closely related to crickets and katydids. Over 100 species of grasshoppers occur in Colorado and ...

False chinch bug

False chinch bug, Nysius raphanus Order: HemipteraFamily: Lygaeidae Description False chinch bug adults are about 3-4 mm (1/8 - 1/6 inches) long and grayish brown with slender bodies and long ...

Corn earworm in sweet corn

Corn earworm, Helicoverpa zea Order: LepidopteraFamily: Noctuidae Description Corn earworm moths have a wingspan of about 2.5-3.8 cm (1-1.5 inches) and are white or tan with irregular wing ...

Black grass bugs

Black grass bugs Order: HemipteraFamily: Miridae Description Black grass bugs are an assemblage of insect species from two genera, Irbisia spp. and Lapobs spp. They are small, black true bugs ...

Armyworm

Armyworm, Mythimna unipuncta Order: LepidopteraFamily: Noctuidae Description The armyworm is a globally distributed pest that attacks crops in North America, from southern Canada to the ...

Army cutworm

Army cutworm, Euxoa auxiliaris Order: LepidopteraFamily: Noctuidae Description The army cutworm is native to the United States and is widely distributed throughout the west. This species is ...

Aphids in alfalfa

Aphids in alfalfa Order: HemipteraFamily: Aphididae Description There are four aphid species considered to be economically important pests of alfalfa (Medicago sativa) grown in Colorado: the ...

Amauromyza karli in quinoa

Amauromyza karli in quinoa Order: DipteraFamily: Agromyzidae Introduction and damage Amauromyza karli is an emerging stem-boring pest of quinoa, recently identified in Colorado, Oregon, and ...

Alfalfa weevil

Alfalfa weevil, Hypera postica Order: ColeopteraFamily: Curculionidae Description The alfalfa weevil was introduced to the United States from Eurasia and North Africa. In the United States, ...

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Agricultural Diseases

Wheat streak mosaic virus (WSMV)

Wheat streak mosaic virus (WSMV) Written by: Diego Gutierrez CastilloPosted: December 28, 2023 Disease symptoms Wheat streak mosaic virus (WSMV) disease was first reported in the United States ...

Alfalfa mosaic virus (AMV)

Alfalfa mosaic virus (AMV) Written by: Taylor JanecekPosted: July 11, 2023 Disease symptoms Symptoms of AMV include leaf mosaic, leaf discoloration, leaf curling or deformation, and abnormal ...

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View Wheat Disease Newsletters

Agricultural Weeds

Canada thistle

Canada thistle, Cirsium arvense Also known as creeping thistle. Weed identification: Growth form is an erect perennial herb initially with a tap root producing far-creeping white or yellowish ...

Jointed goatgrass

Jointed goatgrass, Aegilops cylindrica Also known as cylindrical goatgrass. Weed identification: Seedlings have narrow, grass-like leaves with fine hairs on the leaf margins. Mature plants are ...

Russian knapweed

Russian knapweed, Rhapontocum repens (L.) Also known as Turkestan thistle, creeping knapweed, mountain bluet, Russian cornflower, or hardheads. Weed identification: Russian knapweed is a clonal ...

Yellow toadflax

Yellow toadflax, Linaria vulgaris Also known as butter and eggs or wild snapdragon. Weed identification: This weed has been found throughout North America, with a considerable number of cases ...

Redroot pigweed

Redroot pigweed, Amaranthus retroflexus Also known as redroot amaranth, rough pigweed, common amaranth, or careless weed. Weed identification: Redroot pigweed is a summer annual weed that can ...

Cheatgrass

Cheatgrass, Bromus tectorum Also known as downy brome or drooping brome. Weed identification: Bromus tectorum is an annual grass species native to Europe and western Asia, but widely present in ...

Kochia

Kochia, Bassia scoparia L. This content is an excerpt from the Getting Rid of Weeds Through Integrated Pest Management website. For the complete report on Kochia please visit the growiwm.org ...

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