Identifying weeds in field crops

''The information presented here about field crop weeds was developed from the publication An IPM Pocket Guide for Weed Identification in Field Crops by Wesley Everman, Christy Sprague, Steven Gower and Robert Richardson. Purchase this in a pocket-sized guide for reference from MSU Extension (publication E-3081). Download Adobe Acrobat Reader to view pdf files.

For reference:

Identify weeds by:

Funding to place the guide information on this website was provided by:
The North Central IPM Center

Identifying characteristics

Ligule type

Absent
Barnyardgrass

Membranous
Annual bluegrass
Common windgrass
Johnsongrass
Large crabgrass
Quackgrass
Shattercane
Smooth crabgrass

Hairy
Cheat
Downy brome
Fall panicum
Field sandbur
Giant foxtail and Green foxtail

Cotyledon shape

Kidney
Entireleaf morningglory
Field bindweed
Hedge bindweed
Ivyleaf morningglory
Pitted morningglory
Tall morningglory
Wild mustard

Linear
Buckhorn plantain
Common chickweed
Common lambsquarters
Common yarrow
Mouseear chickweed
Poison hemlock
Powell amaranth
Prostrate pigweed
Redroot pigweed
Smooth pigweed
Tumble pigweed
Vetches
Wild carrot

Lance-shaped
Common cocklebur

Oblong
Broadleaf dock
Common purslane
Curly dock
Jimsonweed
Kochia
Ladysthumb
Mile-a-minute
Pale smartweed
Pennsylvania smartweed
Swamp smartweed
Tartary buckwheat
Wild buckwheat

Oval
Birdsfoot trefoil
Common burdock
Common groundsel
Common mullein
Common ragweed
Giant ragweed
Hemp dogbane
Horseweed
Marestail
Pokeweed
Prostrate spurge
Spotted spurge
Spreading dogbane
Virginia pepperweed
Western ragweed

Egg-shaped
Common waterhemp
Corn speedwell
Eastern black nightshade
Hairy nightshade
Purslane speedwell
Slender speedwell

Round
Common mallow
Hairy galinsoga
Henbit
Hoary alyssum
Prickly sida
Purple deadnettle
Velvetleaf
Venice mallow
White campion
Yellow rocket

Spatula-shaped
Blackseed plantain
Broadleaf plantain
Bull thistle
Canada thistle
Carpetweed
Common milkweed
Dandelion
Red clover
White clover

 

Leaf margins

Smooth
Birdsfoot trefoil
Blackseed plantain
Broadleaf plantain
Buckhorn plantain
Carpetweed
Common chickweed
Common milkweed
Common mullein
Common purslane
Common waterhemp
Field bindweed
Hedge bindweed
Hemp dogbane
Hoary alyssum
Kochia
Ladysthumb
Mile-a-minute
Mouseear chickweed
Pale smartweed
Pennsylvania smartweed
Pokeweed
Powell amaranth
Prostrate pigweed
Prostrate spurge
Redroot pigweed
Smooth pigweed
Spotted spurge
Spreading dogbane
Swamp smartweed
Tartary buckwheat
Vetches
White campion
Wild buckwheat

Lobed
Annual sowthistle
Bull thistle
Canada thistle
Entireleaf morningglory
Horsenettle
Ivyleaf morningglory
Perennial sowthistle
Pitted morningglory
Prickly lettuce
Spiny sowthistle
Tall morningglory
Virginia pepperweed
Yellow rocket

Serrated or toothed
Annual sowthistle
Black medic
Common blue violet
Common cocklebur
Common eveningprimrose
Common groundsel
Common lambsquarters
Common mallow
Corn speedwell
Cutleaf eveningprimrose
Dandelion
Eastern black nightshade
Field pennycress
Field violet
Hairy galinsoga
Hairy nightshade
Henbit
Horseweed
Jimsonweed
Marestail
Perennial sowthistle
Prickly lettuce
Prickly sida
Purple deadnettle
Purslane speedwell
Red clover
Shepherd’s purse
Smooth groundcherry
Slender speedwell
Spiny sowthistle
Velvetleaf
Venice mallow
White clover
Wild mustard

Dissected or divided
Common ragweed
Giant ragweed
Western ragweed
Wild carrot

Wavy
Broadleaf dock
Common burdock
Curly dock
Tumble pigweed

 

Common name

Annual bluegrass
Annual sowthistle
Asiatic (common) dayflower
Barnyardgrass
Birdsfoot trefoil
Black medic
Blackseed plantain
Broadleaf dock
Broadleaf plantain
Buckhorn plantain
Bull thistle
Canada thistle
Carpetweed
Cheat
Common blue violet
Common burdock
Common chickweed
Common cocklebur
Common eveningprimrose
Common groundsel
Common lambsquarters
Common mallow
Common milkweed
Common mullein
Common purslane
Common ragweed
Common waterhemp
Common windgrass
Common yarrow
Corn speedwell
Curly dock
Cutleaf eveningprimrose
Dandelion
Downy brome
Eastern black nightshade
Entireleaf morningglory

Fall panicum
Field bindweed
Field horsetail
Field pennycress
Field sandbur
Field violet
Giant foxtail
Giant ragweed
Green foxtail
Hairy galinsoga
Hairy nightshade
Hedge bindweed
Hemp dogbane
Henbit
Hoary alyssum
Horsenettle
Horseweed
Ivyleaf morningglory
Jimsonweed
Johnsongrass
Kochia
Ladysthumb
Large crabgrass
Marestail
Mile-a-minute
Mouseear chickweed
Pale smartweed
Pennsylvania smartweed
Perennial sowthistle
Pitted morningglory
Poison hemlock
Pokeweed
Powell amaranth
Prickly lettuce
Prickly sida
Prostrate pigweed

Prostrate spurge
Purple deadnettle
Purslane speedwell
Quackgrass
Red clover
Redroot pigweed
Scouringrush
Shattercane
Shepherd’s purse
Slender speedwell
Smooth crabgrass
Smooth groundcherry
Smooth pigweed
Spiny sowthistle
Spotted spurge
Spreading dogbane
Swamp smartweed
Tall morningglory
Tartary buckwheat
Tumble pigweed
Velvetleaf
Venice mallow
Vetches
Virginia pepperweed
Western ragweed
White campion
White clover
Wild buckwheat
Wild carrot
Wild garlic
Wild mustard
Wild onion
Yellow foxtail
Yellow nutsedge
Yellow rocket

Scientific name

Abutilon theophrasti Medicus
Achillea millefolium L.
Allium canadense L.
Allium vineale L.
Amaranthus albus L.
Amaranthus blitoides S. Wats.
Amaranthus hybridus L.
Amaranthus powellii S. Wats.
Amaranthus retroflexus L.
Amaranthus rudis L.
Ambrosia artemisiifolia L.
Ambrosia psilostachya DC.
Ambrosia trifida L.
Apera spica-venti L.
Apocynum androsaemifolium L.
Apocynum cannabinum L.
Arctium minus (Hill) Bernh.
Asclepias syriaca L.
Barbarea vulgaris R. Br.
Berteroa incana (L.) DC.
Bromus secalinus L.
Bromus tectorum L.
Calystegia sepium (L.) R. Br.
Capsella bursa-pastoris (L.) Medicus
Cenchrus incertus M.A. Curtis
Cerastum fontanum ssp. vulgare (Hartman) Greuter & Burdet
Chamaesyce humistrata (Engelm. ex Gray) Small
Chamaesyce maculata (L.) Small
Chenopodium album L.
Cirsium arvense (L.) Scop.
Cirsium vulgare (Savi) Tenore
Commelina communis L.
Conium maculatum L.
Convolvulus arvensis L.
Conyza canadensis (L.) Cronq.

Cyperus esculentus L.
Datura stramonium L.
Daucus carota L.
Digitaria ischaemum (Schreb.) Schreb. ex Muhl.
Digitaria sanguinalis (L.) Scop.
Echinochloa crus-galli (L.) Beauv.
Elymus repens (L.) Gould
Equisetum arvense L.
Equisetum hyemale L.
Fagopyrum tatricum (L.) Gaertn.
Galinsoga quadriradiata Cav.
Hibiscus trionum L.
Ipomoea hederacea L. Jacq.
Ipomoea hederacea var. integriuscula Gray
Ipomoea lacunosa L.
Ipomoea purpurea (L.) Roth
Kochia scoparia L.
Lactuca serriola L.
Lamium amplexicaule L.
Lamium purpureum L.
Lepidium virginicum L.
Lotus corniculatus L.
Malva neglecta Wallr.
Medicago lupulina L.
Mollugo verticillata L.
Oenothera biennis L.
Oenothera laciniata Hill
Panicum dichotomiflorum Michx.
Physalis longifolia Nutt. var. subglabrata (Mackenzie & Bush) Cronq.
Phytolacca americana L.
Plantago lanceolata L.
Plantago major L.
Plantago rugelii Dcne.
Poa annual L.

Polygonum amphibium var. emersum Michx.
Polygonum convolvulus L.
Polygonum lapathifolium L.
Polygonum pensylvanicum L.
Polygonum perfoliatum L.
Polygonum persicaria L.
Portulaca oleracea L.
Rumex crispus L.
Rumex obtusifolius L.
Senecio vulgaris L.
Setaria faberi Herrm.
Setaria glauca (L.) Beauv.
Setaria viridis L.
Sida spinosa L.
Silene latifolia Poir.
Sinapis arvensis L.
Solanum carolinense L.
Solanum ptycanthum Dun.
Solanum sarrachoides Sendtner
Sonchus asper (L.) Hill.
Sonchus arvensis L.
Sonchus oleraceus L.
Sorghum bicolor (L.) Moench
Sorghum halepense (L.) Pers.
Stellaria media L. Vill.
Taraxacum officinale Weber in Wiggers
Thlaspi arvense L.
Trifolium pratense L.
Trifolium repens L.
Verbascum thapsus L.
Veronica arvensis L.
Veronica filiformis Sm.
Vicia spp.
Viola arvensis Murr.
Viola papilionacea Pursh
Xanthium strumarium L.

The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the AgBioResearch, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.