List of Herbicide Resistant Weeds by Weed Species

INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE

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Abutilon theophrasti
Acalypha australis
Ageratum conyzoides
Agrostis stolonifera
Alisma canaliculatum
Alisma plantago-aquatica
Alopecurus aequalis
Alopecurus japonicus
Alopecurus myosuroides
Amaranthus albus
Amaranthus blitoides
Amaranthus blitum (ssp. oleraceus)
Amaranthus cruentus
Amaranthus hybridus (syn: quitensis)
Amaranthus palmeri
Amaranthus powellii
Amaranthus retroflexus
Amaranthus spinosus
Amaranthus tuberculatus (=A. rudis)
Amaranthus viridis
Ambrosia artemisiifolia
Ambrosia trifida
Ammannia auriculata
Ammannia coccinea
Ammannia multiflora
Anthemis arvensis
Anthemis cotula
Anthriscus caucalis
Apera spica-venti
Arabidopsis thaliana
Arctotheca calendula
Arenaria serpyllifolia
Aster squamatus
Atriplex patula
Avena fatua
Avena sterilis
Avena sterilis ssp. ludoviciana
Bacopa rotundifolia
Beckmannia syzigachne
Bidens pilosa
Bidens subalternans
Bidens tripartita
Bifora radians
Blyxa aubertii
Brachiaria eruciformis
Brachypodium distachyon
Brassica rapa (=B. campestris)
Brassica tournefortii
Bromus catharticus
Bromus commutatus
Bromus diandrus
Bromus diandrus ssp. rigidus (=B. rigidus)
Bromus japonicus
Bromus madritensis
Bromus rubens
Bromus secalinus
Bromus sterilis
Bromus tectorum
Buglossoides arvensis (=Lithospermum arvense)
Camelina microcarpa
Capsella bursa-pastoris
Carduus acanthoides
Carduus nutans
Carduus pycnocephalus
Centaurea cyanus
Centaurea solstitialis
Centaurea stoebe ssp. micranthos
Chamaesyce maculata
Chenopodium album
Chenopodium album var. striatum (=C. strictum var. glaucophyllum)
Chenopodium ficifolium
Chenopodium polyspermum
Chenopodium simplex (=C. hybridum)
Chloris barbata = (C. inflate)
Chloris elata
Chloris radiata
Chloris truncata
Chloris virgata
Chrysanthemum coronarium
Cirsium arvense
Clidemia hirta
Commelina diffusa
Convolvulus arvensis
Conyza bonariensis
Conyza canadensis
Conyza sumatrensis
Crassocephalum crepidioides
Crepis tectorum
Crypsis schoenoides
Cuphea carthagenensis
Cuscuta pentagona (=C. campestris)
Cynodon hirsutus
Cynosurus echinatus
Cyperus brevifolius
Cyperus compressus
Cyperus difformis
Cyperus esculentus
Cyperus iria
Cyperus odoratus
Damasonium minus
Datura stramonium
Daucus carota
Descurainia sophia
Digitaria ciliaris
Digitaria insularis
Digitaria ischaemum
Digitaria sanguinalis
Diplotaxis erucoides
Diplotaxis tenuifolia
Dopatrium junceum
Echinochloa colona
Echinochloa crus-galli var. crus-galli
Echinochloa crus-galli var. formosensis
Echinochloa crus-galli var. zelayensis
Echinochloa crus-pavonis
Echinochloa erecta
Echinochloa oryzoides
Echinochloa phyllopogon (=E. oryzicola)
Echium plantagineum
Ehrharta longiflora
Elatine triandra var. pedicellata
Eleocharis acicularis
Eleusine indica
Epilobium ciliatum
Epilobium tetragonum
Erigeron philadelphicus
Eriochloa punctata
Erucaria hispanica
Erysimum repandum
Euphorbia heterophylla
Fimbristylis miliacea
Fumaria densiflora
Galeopsis tetrahit
Galinsoga ciliata
Galinsoga parviflora
Galium aparine
Galium spurium
Galium tricornutum
Gamochaeta pensylvanica
Glebionis segetum
Hedyotis verticillata
Helianthus annuus
Hirschfeldia incana
Hordeum jubatum
Hordeum murinum ssp. glaucum
Hordeum murinum ssp. leporinum
Hydrilla verticillata
Ischaemum rugosum
Iva xanthiifolia
Ixophorus unisetus
Kochia scoparia
Lactuca saligna
Lactuca serriola
Lamium amplexicaule
Landoltia punctata
Lepidium virginicum
Leptochloa chinensis
Leptochloa fusca spp. fasicularis
Leptochloa panicoides
Leptochloa scabra
Leptochloa virgata
Limnocharis flava
Limnophila erecta
Limnophila sessiliflora
Lindernia dubia (=Lindernia dubia var. major)
Lindernia micrantha
Lindernia procumbens
Lithospermum arvense
Lolium perenne
Lolium perenne ssp. multiflorum
Lolium persicum
Lolium rigidum
Ludwigia prostrata
Matricaria discoidea
Matricaria recutita (= M. chamomilla)
Mazus fauriei
Mazus pumilus
Mesembryanthemum crystallinum
Mitracarpus hirtus
Monochoria korsakowii
Monochoria vaginalis
Myosoton aquaticum
Nassella neesiana
Nassella trichotoma
Neslia paniculata
Oryza sativa var. sylvatica
Panicum capillare
Panicum dichotomiflorum
Panicum miliaceum var. ruderale Kitag.
Papaver rhoeas
Parthenium hysterophorus
Paspalum paniculatum
Pentzia suffruticosa
Phalaris brachystachys
Phalaris minor
Phalaris paradoxa
Picris hieracioides
Plantago lagopus
Plantago lanceolata
Poa annua
Poa trivialis
Polygonum aviculare
Polygonum convolvulus (=Fallopia convolvulus)
Polygonum hydropiper
Polygonum lapathifolium
Polygonum pensylvanicum
Polygonum persicaria
Polypogon fugax
Polypogon monspeliensis
Portulaca oleracea
Ranunculus acris
Raphanus raphanistrum
Raphanus sativus
Rapistrum rugosum
Rorippa indica
Rostraria smyrnacea (=Lophochloa smyrnacea)
Rotala indica var. uliginosa
Rotala pusilla
Rottboellia cochinchinensis (=R. exaltata)
Rumex acetosella
Rumex dentatus
Rumex obtusifolius
Sagittaria guayanensis
Sagittaria montevidensis
Sagittaria pygmaea
Sagittaria trifolia
Salsola tragus
Schoenoplectus fluviatilis
Schoenoplectus juncoides
Schoenoplectus mucronatus (=Scirpus mucronatus)
Schoenoplectus wallichii
Sclerochloa dura
Sclerochloa kengiana
Secale cereale
Senecio vernalis
Senecio vulgaris
Setaria faberi
Setaria pumila (=S. glauca)
Setaria verticillata
Setaria viridis
Setaria viridis var. major (=var. robusta-alba, var. robustapurpurea)
Sida spinosa
Silene gallica
Sinapis alba
Sinapis arvensis
Sisymbrium orientale
Sisymbrium thellungii
Snowdenia polystachya
Solanum americanum
Solanum nigrum
Solanum ptycanthum
Soliva sessilis
Sonchus asper
Sonchus oleraceus
Sorghum bicolor
Sorghum bicolor ssp. drummondii (=Sorghum sudanese)
Sorghum halepense
Spergula arvensis
Sphenoclea zeylanica
Sporobolus fertilis
Steinchisma laxum
Stellaria media
Thlaspi arvense
Tridax procumbens
Tripleurospermum perforatum (=T. inodorum)
Urochloa panicoides
Urochloa plantaginea (=Brachiaria plantaginea)
Urtica urens
Vaccaria hispanica
Vicia sativa
Vulpia bromoides
Xanthium strumarium
Youngia japonica
Zea mays ssp. mexicana

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African Mustard
African Turnipweed
Alexandergrass
Amazon Sprangletop
American Black Nightshade
American Sloughgrass
Annual Bluegrass
Annual Falsebrome
Annual Sedge
Annual Sowthistle
Arrocillo
Arrowleafed Monochoria
Asia Minor bluegrass
Asian Copperleaf
Asian Mazus
Asiatic Hawksbeard
Azetogarashi (Japanese)
Ball Mustard
Barnyardgrass
Bearded Sprangletop
Birdsrape Mustard
Black Nightshade
Blackgrass
Bristly Foxtail
Broad-Leaved Dock
Buckhorn Plantain
Bur Beggarticks
Bur Chervil
Burning Nettle
Bushy Wallflower
California Arrowhead
Calomba daisy
Canada thistle
Capeweed
Catchweed Bedstraw
Catstail
Cheat (Rye Brome)
Chilean or Uruguayan Needlegrass
Chinese Sprangletop
Coat Buttons
Common Chickweed
Common cocklebur
Common False-pimpernel; Azena (Japanese)
Common Groundsel
Common Hempnettle
Common Lambsquarters
Common Purslane
Common Ragweed
Common Sunflower
Common Vetch
Common Waterplantain
Compact Brome
Corn Chamomile
Corn Gromwell
Corn Gromwell
Corn Marigold
Corn Poppy
Corn Spurry
Cornflower
Cowcockle
Creeping Bentgrass
Crown daisy
Crystalline Iceplant
Dense-flowered Fumitory
Disc Waterhyssop
Dopatrium
Dotted Duckweed
Downy Brome (Cheatgrass)
Dwarf Arrowhead
Eared Redstem
Early Watergrass
Eastern Black Nightshade
Eastern Groundsel
English Catchfly
Ethiopian grass
Fall Panicum
False Cleavers
False Loosestrife
Feather Fingergrass
Feral Rye
Field Bindweed
Field Dodder
Field Pennycress
Figleaved Goosefoot
Flixweed
Foxtail Barley
Fragrant Flatsedge
Fringed Willowherb
Gallant Soldier
Giant Foxtail
Giant Goosefoot
Giant Green Foxtail
Giant Parramatta grass
Giant Ragweed
Globe Fringerush
Goosegrass
Gooseweed
Gramilla mansa
Greater Beggarticks
Green Foxtail
Gulf Cockspur
Gulf Cockspur Grass
Guyanese Arrowhead
Hairy Beggarticks
Hairy Fleabane
Hairy Galinsoga
Halberdleaf Orach
Hardgrass
Hare Barley
Hare's Foot Plantain
Hawkweed Oxtongue
Hedgehog Dogtailgrass
Henbit Deadnettle
Hera-omodaka
Hood Canarygrass
Horseweed
Hydrilla
Italian Ryegrass
Italian Thistle
Itchgrass
Japanese Brome
Japanese Foxtail
Japanese Mazus
Jimsonweed
Johnsongrass
Junglerice
Keng Stiffgrass
Kikashigusa
Kochia
Ladysthumb
Large Crabgrass
Late Watergrass
Lateflowering Goosefoot
Lawn Burweed
Lax Panicgrass
Limnophila (Asian marshweed)
Little seed Canary grass
Liverseedgrass
Livid Amaranth
Longflowered veldtgrass
Low False-pimpernel
Many Flowered Ammannia
Manyseeded Goosefoot
Marshelder
Marshpepper Smartweed
Marshweed
Mayweed Chamomile
Meadow Brome
Mexican teosinte
Mizohakobe (Waterwort)
Mizuaoi (JPN)/Moolokzam (KOR)
Mizu-matsuba
Mouse-ear Cress
Musk Thistle
Narrowleaf Hawksbeard
Needle Spikerush
Oriental Mustard
Pale Smartweed
Palmer Amaranth
Pasto Amargo
Pasto Honduras (Mexicangrass)
Patersons Curse
Pennsylvania Everlasting
Pennsylvania Smartweed
Perennial Ryegrass
Perennial Wallrocket
Persian Darnel
Philadelphia Fleabane
Pineapple-weed
Plumeless Thistle
Pollacci Barnyardgrass
Poverty Brome
Powell Amaranth
Prickly Lettuce
Prickly Sida
Prostrate Knotweed
Prostrate Pigweed
Rabbitfoot Polypogon
Radiate Fingergrass
Radish
Ragweed Parthenium
Red Amaranth
Red Brome
Red Rice
Redflower Ragleaf
Redroot Pigweed
Redstem
Rescuegrass
Rice Flatsedge
Ricefield Bulrush
Rigid Brome
Rigid Ryegrass
Ripgut Brome
River Bulrush
Rock Bulrush
Rough Sprangletop
Roughstalk Bluegrass
Roundfruit Blyxa
Russian-thistle
Saltmarsh Aster
Saramollagrass
Sawah Flowering Rush
Scentless Chamomile
Serrated Tussock
Shattercane
Sheep Sorrel
Shepherd's-purse
Shortawn Foxtail
Shortleaf Spikesedge
Shortpod Mustard
Shortspike Canarygrass
Silky Windgrass
Slender Amaranth
Smallflower Umbrella Sedge
Smallseed Flaxfalse
Smooth Barley
Smooth Crabgrass
Smooth Pigweed
Soapbush
Sourgrass
Southern Crabgrass
Spanish Pink Mustard
Spiny Amaranth
Spiny Sowthistle
Spotted knapweed
Spotted Spurge
Spreading Dayflower
Square-stalked Willowherb
Squirreltail Fescue
Starfruit
Sterile Oat
Sterile oat
Sudangrass
Sumatran Fleabane
Swamp Pricklegrass
Sweet Summer Grass
Swollen Fingergrass
Taiwan barnyardgrass
Taiwan-yamai
Tall Buttercup
Tall Waterhemp
Tall Windmill Grass
Tarweed Cuphea
Threehorn Bedstraw
Threeleaf Arrowhead
Thymeleaf Sandwort
Toothed Dock
Tropical Girdlepod
Tropical Sprangletop (Juddsgrass)
Tropical Whiteweed
Tumble Pigweed
Turnipweed
Variableleaf Yellowcress
Velvetleaf
Virginia Pepperweed
Water Starwort
White Mustard
White Wallrocket
Wild Bishop
Wild Buckwheat
Wild Carrot
Wild Chamomile
Wild Mustard
Wild Oat
Wild Panicgrass
Wild Poinsettia
Wild Radish
Willow-leaved lettuce
Windmill Grass
Witchgrass
Woody borreria
Yellow Foxtail
Yellow Nutsedge
Yellow Starthistle

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Herbicide Resistant Spotted knapweed Globally
(Centaurea stoebe ssp. micranthos)

Country

FirstYear

Situation

Active Ingredients

Site of Action

Canada (British Columbia)

2013

Rangeland

clopyralid, and picloram

Auxin Mimics HRAC Group 4 (Legacy O)

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Heap, I. The International Herbicide-Resistant Weed Database. Online. Monday, November 3, 2025 . Available www.weedscience.org Copyright © 1993- 2025 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.