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Weeds are simply an unwanted plant in the wrong place, at the right time. The weeds can directly and indirectly impact agricultural crops and are just as costly to the environment as any other unwanted species.
Weeds are simply an unwanted plant in the wrong place, at the right time. The weeds can directly and indirectly impact agricultural crops and are just as costly to the environment as any other unwanted species.
PEST RATING PROPOSAL:
⇒ WEEDS:
PEST RATINGS:
Algerian sea lavendar: Limonium ramosissimum
Pest Rating: B
Alliaria petiolata (M. Bieb.) Cavara & Grande, garlic mustard, hedge-garlic
Pest Rating: A
Alligatorweed | Alternanthera philoxeroides
Pest Rating: A | Proposed Seed Rating: R
American eelgrass | Vallisneria americana Michx.
Pest Rating: D | Seed Rating: Not Rated
Achnatherum brachychaetum (Godr.) Barkworth (punagrass)
Pest Rating: B | Seed Rating: P
Asclepias curassavica L.: Tropical milkweed; bloodflower milkweed; Mexican milkweed; false ipecac
Pest Rating: B
Baby’s Breath | Gypsophila paniculata L.
Pest Rating: B | Seed Rating: Not Rated
Balloon Plant | Asclepias physocarpa
Pest Rating: C | Seed Rating: Not Rated
Banana waterlily: Nymphaea mexicana
Pest Rating: C
Barbwire Russian Thistle | Salsola gobicola
Pest Rating : B | Proposed Seed Rating: R
Bassia scoparia (L.) A.J. Scott, kochia, Mexican fireweed, burningbush, summer cypress
Pest Rating: C
Bearded creeper | Crupina vulgaris Pers. ex. Cass.
Pest Rating: A | Proposed Seed Rating: P
Bermuda grass | Cynodon dactylon
Pest Rating: D | Proposed Seed Rating: None
Bitou bush | Chrysanthemoides monilifera
Pest Rating: A | Proposed Seed Rating: R
Blue panicgrass: Panicum antidotale
Pest Rating: C
Branched broomrape | Orobanche ramosa L.
Pest Rating: A | Proposed Seed Rating: P
Buffel grass | Pennisetum ciliare
Pest Rating: D | Proposed Seed Rating: None
Capeweed | Arctotheca calendula (L.) Levyns
Pest Rating: A | Proposed Seed Rating: P
Carduus pycnocephalus: Italian thistle
Pest Rating: C | Seed Rating: R
Cenchrus clandestinus (Hochst. ex Chiov.) Marrone: kikuyugrass Pest Rating: C | Proposed Rating: C
Chamberbitter: Phyllanthus urinaria L.
Pest Rating: C | Proposed Seed Rating: R
Cheatgrass | Bromus tectorum
Pest Rating: C | Proposed Seed Rating: None
Coco-Yam, Elephant Ear or Taro | Colocasia esculenta
Pest Rating: D | Seed Rating: Not Rated
Common reed (Phragmites australis):
Phragmites australis cf. subsp. altissimus (non-native)
Pest Rating: C | Proposed Seed Rating: R
Phragmites australis subsp. americanus (native)
Pest Rating: D | Proposed Seed Rating: None
Cyperus esculentus, yellow nutsedge
Pest Rating: C | Seed Rating: Restricted
Cyperus rotundus, purple nutsedge
Pest Rating: C | Seed Rating: Restricted
Dagger-flower | Mantisalca salmantica (L.) Briq. & Cavill.
Synonym: Centaurea salmantica L.
Pest Rating: A | Proposed Seed Rating: P
Desert knapweed: Volutaria tubuliflora
Pest Rating: A | Seed Rating: R
Dwarf poinsettia: Euphorbia cyathophora
Pest Rating: C
Egyptian broomrape | Orobanche aegyptiaca Pers.
Pest Rating: A | Proposed Seed Rating: P
Eichhornia crassipes (Mart.) Solms, water hyacinth, common water hyacinth, floating water hyacinth
Synonyms: Pontederia crassipes Mart., Eichhornia speciosa Kunth
Pest Rating: C
English Ivy, Irish Ivy & Algerian Ivy: Hedera spp.
Pest Rating: None
Euphorbia helioscopia L.: sun spurge
Pest Rating: B
European Frogbit | Hydrocharis morsus-ranae L.
Pest Rating: A | Proposed Seed Rating: P
European Mistletoe | Viscum album L
Pest Rating: A | Proposed Seed Rating: R
European sea lavendar: Limonium duriusculum
Pest Rating: B
False Pickerel Weed | Monochoria vaginalis (Burm. f.) C. Presl ex Kunth
Pest Rating: A | Proposed Seed Rating: R
False Yellowhead | Dittrichia viscosa (L.) Greuter
Pest Rating: A | Proposed Seed Rating: P
Field Bindweed | Convolvulus arvensis L.
Pest Rating: C | Proposed Seed Rating: R
Flowering-rush | Butomus umbellatus
Pest Rating: B | Proposed Seed Rating: R
French broom: Genista monspessulana
Pest Rating: C
Giant chickweed: Myosoton aquaticum
Pest Rating: C
Giant Hogweed | Heracleum mantegazzianum
Pest Rating : A | Proposed Seed Rating: P
Giant Knotweeds:
Fallopia japonica, F. sachalinensis,
& F. X bohemica
Pest Rating: A | Proposed Seed Rating: R
Giant Ragweed | Ambrosia trifida L.
Pest Rating: B
Giant Reed | Arundo donax
Pest Rating: B | Proposed Seed Rating: R
Goatsrue | Galega officinalis
Pest Rating: A | Proposed Seed Rating: P
Graceful Spurge | Euphorbia hypericifolia L.
Pest Rating: A | Seed Rating: Not Rated
Halogeton glomeratus (M. Bieb.) Ledeb., halogeton, saltlover Pest Rating: B
Hydrilla verticillata (L. f.) Royle, hydrilla Pest Rating: A
Hypericum canariense L., Canary Island St. Johnswort
Pest Rating: B
Hypericum perforatum L., Klamathweed, common St. Johnswort
Pest Rating: C
Heartleaf nightshade: Solanum cardiophyllum
Pest Rating: C
Indian swampweed | Hygrophila polysperma (Roxb.) T. Anderson
Pest Rating: A | Proposed Seed Rating: P
Jacobaea vulgaris Gaertn., tansy ragwort
Pest Rating: B
Japanese Hawkweed | Youngia japonica (L.) DC.
Pest Rating: B | Proposed Seed Rating: R
Japanese thistle: Cirsium japonicum
Pest Rating: D
Jeweled distaff thistle | Carthamus oxyacantha
Pest Rating: B | Proposed Seed Rating: P
Jewels of Opar/Fameflower | Talinum paniculatum
Pest Rating: C | Proposed Seed Rating: None
Jointed bulrush | Schoenoplectus articulatus (L.) Palla
Synonym: Scirpus articulatus L.
Pest Rating: D | Seed Rating: Not Rated
Jointvetch | Aeschynomene spp.
Pest Rating: A | Proposed Seed Rating: P
Kidneyleaf Mud Plantain | Heteranthera reniformis
Pest Rating: A | Proposed Seed Rating: P
Koenigia polystachya (Wall. ex Meisn.) T.M. Schust. & Reveal, Himalayan knotweed
Pest Rating: A
Laportea Canadensis
Pest Rating: D | Seed Rating: Not Rated
Lathyrus nissolia L. grass vetchling, grass pea
Pest Rating: B
Lepidium coronopus (L.) Al-Shehbaz, swinecress, greater swinecress, creeping wartcress
Pest Rating: B
Lily of the Valley Vine | Salpichroa origanifolia
Pest Rating: C | Proposed Seed Rating: R
Limnophila indica (L.) Druce, Indian marshweed
Pest Rating: B
Limnophila sessiliflora Blume, ambulia, Asian marshweed
Pest Rating: A
Ludwigia peruviana (L.) H. Hara, Peruvian primrose-willow, Peruvian water-primrose
Pest Rating: A
Manchurian Wild Rice | Zizania latifolia
Pest Rating: A | Proposed Seed Rating: R
Mascarene Island leaf-flower: Phyllanthus tenellus
Pest Rating: C
Mexican pokeweed | Phytolacca heterotepala H. Walter
Pest Rating: A | Proposed Seed Rating: R
Misopates orontium (L.) Raf., lesser snapdragon, linear-leaved snapdragon, weasel’s-snout
Pest Rating: C
Myrtle Spurge | Euphorbia Myrsinites
Pest Rating: A | Proposed Seed Rating: R
Nothoscordum gracile (Aiton) Stern, slender false garlic
Pest Rating: B
Oenothera sinuosa W.L. Wagner & Hoch, wavyleaf guara, wavyleaf beeblossom
Pest Rating: B
Old man’s beard | Clematis vitalba
Pest Rating: A | Proposed Seed Rating: P
Onopordum acanthium L., Scotch thistle; cotton thistle
Pest Rating: A
Orange Hawkweed | Hieracium aurantiacum
Pest Rating: B | Proposed Seed Rating: P
Osteospermum calendulaceum L.f., stinking roger
Pest Rating: A
Parrotfeather Myriophyllum aquaticum (Vell.) Verdc.
Pest Rating: C | Proposed Seed Rating: R
Paterson’s curse | Echium plantagineum L.
Pest Rating: A | Proposed Seed Rating: P
Physalis longifolia Nutt., smooth groundcherry, long leafed groundcherry
Pest Rating: C
Physalis viscosa L., grape groundcherry, Physalis cinerascens (Dunal) Hitchc., starhair groundcherry
Pest Rating: C
Pickerelweed | Pontederia cordata L
Pest Rating: D | Proposed Seed Rating: None
Pillpod spurge: Euphorbia hirta
Pest Rating: C
Portuguese Broom | Cytisus striatus
Pest Rating: B | Proposed Seed Rating: P
Prickly Acacia | Vachellia nilotica
Pest Rating: A | Proposed Seed Rating: P
Prosopis strombulifera (Lam.) Benth., creeping mesquite, Argentine screwbean
Pest Rating: A
Rorippa austriaca (Crantz) Besser, Austrian fieldcress, Austrian yellowcress
Pest Rating: A
Rorippa sylvestris (L.) Besser, creeping yellowcress, creeping yellow fieldcress
Pest Rating: B
Rubus bifrons Vest, Himalayan blackberry
Pest Rating: C
Ruby saltbush | Enchylaena tomentosa R. Br.
Pest Rating: A | Proposed Seed Rating: R
Russian-thistle: Salsola tragus L.
Pest Rating: C | Proposed Seed Rating: R
Sahara Mustard | Brassica tournefortii
Pest Rating: C | Proposed Seed Rating: R
Salsola paulsenii Litv., barbwire Russian-thistle
Pest Rating: C
Salvia aethiopis L., Mediterranean sage
Pest Rating: B
Salvia virgata Jacq., wand sage, southern meadow sage
Pest Rating: B
Santa Maria feverfew | Parthenium hysterophorus L.
Pest Rating: A | Proposed Seed Rating: P
Scolymus hispanicus L., Golden thistle, Spanish salsify
Pest Rating: A
Sea-myrtle: Baccharis halimifolia
Pest Rating: A
Senecio elegans L.: purple ragwort, red-purple ragwort, purple groundsel, wild cineraria
Pest Rating: B
Senecio linearifolius A. Rich., fireweed groundsel, linear-leaved Australian fireweed
Pest Rating: B
Senecio squalidusL., Oxford ragwort
Pest Rating: B
Senegal tea plant | Gymnocoronis spilanthoides
Synonym: Alomia splanthoides
Pest Rating: A | Proposed Seed Rating: P
Setaria faberi R. A. W. Herrm., giant foxtail, Chinese foxtail
Pest Rating: B
Shining cranesbill | Geranium lucidum L
Pest Rating: A | Proposed Seed Rating: R
Slender snakecotton | Froelichia gracilis (Hook.) Moq.
Pest Rating: D | Proposed Seed Rating: None
Slender Russian Thistle | Salsola collina Pallas
Pest Rating: A | Proposed Seed Rating: P
Smallflower Hawksbeard | Crepis pulchra
Pest Rating: C | Proposed Seed Rating: R
Smallspike false nettle | Boehmeria cylindrica
Pest Rating: C
Snail Medic | Medicago scutellata (L.) Wilson
Pest Rating: D | Seed Rating: Not Rated
Solanum carolinense L., horsenettle, Carolina horsenettle, bull nettle
Pest Rating: B
Solanum lanceolatum Cav., lance-leaf nightshade
Pest Rating: B
South American spongeplant | Limnobium laevigatum
Pest Rating: A | Proposed Seed Rating: P
Spanish Heath | Erica lusitanica
Pest Rating: B | Proposed Seed Rating: R
Spanish Mercury | Mercurialis ambigua
Pest Rating: B | Proposed Seed Rating: R
Sweet broom: Genista x spachiana
Pest Rating: D
Tamarix aphylla (L.) Karst.: athel tree
Pest Rating: B
Thlaspi arvense L., field pennycress, fanweed, stinkweed, Frenchweed
Pest Rating: C
Tree of Heaven | Ailanthus altissima (Miller)
Pest Rating: C | Proposed Seed Rating: R
Tree Spurge | Euphorbia dendroides
Pest Rating: B | Proposed Seed Rating: R
Tripidium ravennae (L.) H. Scholz: Ravennagrass
Pest Rating: B
Tropical Whiteweed | Ageratum conyzoides L.
Pest Rating: C | Proposed Seed Rating: None
Turkey Berry | Solanum torvum
Pest Rating: C | Seed Rating: Not Rated
Vallisneria australis S.W.L. Jacobs and Les: Australian eelgrass, ribbonweed
Pest Rating: B
Virginia buttonweed: Diodia virginiana
Pest Rating: C
Wall Fumitory | Fumaria muralis Sand W.D. J. Koch
Pest Rating: C | Seed Rating: Not Rated
Ward’s weed | Carrichtera annua
Pest Rating: A | Proposed Seed Rating: R
Water-primrose: Ludwigia hexapetala
Pest Rating: C
Water spinach: Ipomoea aquatica
Pest Rating: C
Water sprite: Ceratopteris thalictroides
Pest Rating: D
Wavy-leaved thistle: Cirsium undulatum
Pest Rating: D
West Indian Woodnettle | Laportea aestuans
Pest Rating: C | Seed Rating: Not Rated
White-margined nightshade: Solanum marginatum
Pest Rating: B
Whitesnow: Drymaria cordata
Pest Rating: C
Winged Water-Primrose | Ludwigia decurrens
Pest Rating: A | Proposed Seed Rating: P
Witchweed: Striga spp.
Pest Rating: A
Yellow-Flag Iris | Iris pseudacorus L.
Pest Rating: B | Proposed Seed Rating: R
Yellow Floating-heart | Nymphoides peltata (Gmel.) Kuntze
Pest Rating: A | Proposed Seed Rating: R
Yellowspine thistle: Cirsium ochrocentrum
Pest Rating: C
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