Weeds

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 RATINGS AND PROPOSALS:

Barbwire Russian Thistle |  Salsola gobicola
Pest Rating : B | Proposed  Seed Rating: R

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

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

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 |  Proposed  Seed Rating: N/A

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

Dagger-flower | Mantisalca salmantica (L.) Briq. & Cavill. 
Synonym: Centaurea salmantica L.
Pest Rating: A | Proposed  Seed Rating: P

Egyptian broomrape | Orobanche aegyptiaca Pers.
Pest Rating:  A  | Proposed  Seed Rating:  P

European Frogbit | Hydrocharis morsus-ranae L.
Pest Rating: A |  Proposed  Seed Rating: P

False Yellowhead | Dittrichia viscosa (L.) Greuter
Pest Rating: A |  Proposed  Seed Rating: P

Flowering-rush | Butomus umbellatus
Pest Rating:  B  |  Proposed  Seed Rating:  R

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

Goatsrue | Galega officinalis
Pest Rating:  A  | Proposed  Seed Rating:  P

Hedera spp. | English Ivy, Irish Ivy & Algerian Ivy
Pest Rating: None |  Proposed  Seed Rating: None

Jeweled distaff thistle | Carthamus oxyacantha
Pest Rating: B | Proposed Seed Rating: P

Jointed bulrush | Schoenoplectus articulatus (L.) Palla
Synonym: Scirpus articulatus L.
Pest Rating: D | Proposed  Seed Rating: N/A

Jointvetch | Aeschynomene spp.
Pest Rating: A  |  Proposed  Seed Rating: P

Kidneyleaf Mud Plantain | Heteranthera reniformis
Pest Rating: A |  Proposed  Seed Rating: P

Laportea Canadensis
Pest Rating: D | Proposed Seed Rating: N/A

Lily of the Valley Vine | Salpichroa origanifolia
Pest Rating: C  |  Proposed  Seed Rating:  R

Myrtle Spurge | Euphorbia Myrsinites
Pest Rating: A | Proposed Seed Rating: R

Old man’s beard | Clematis vitalba
Pest Rating: A |  Proposed  Seed Rating: P

Orange Hawkweed | Hieracium aurantiacum
Pest Rating: B |  Proposed  Seed Rating: P

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

Portuguese Broom | Cytisus striatus
Pest Rating: B |  Proposed  Seed Rating: P

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

Santa Maria feverfew | Parthenium hysterophorus L.
Pest Rating: A  |  Proposed  Seed Rating: P

Senegal tea plant | Gymnocoronis spilanthoides
Synonym: Alomia splanthoides
Pest Rating: A  |  Proposed  Seed Rating: P

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

Smallflower Hawksbeard | Crepis pulchra
Current Pest Rating: None
Proposed Pest Rating: C | Proposed Seed Rating: R
Comment Period: 9/12/17 – 10/27/17

Snail Medic | Medicago scutellata (L.) Wilson
Pest Rating:  D | Proposed  Seed Rating: N/A

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

Tree Spurge | Euphorbia dendroides
Pest Rating:  B  | Proposed  Seed Rating:  R 

Ward’s weed  |  Carrichtera annua
Rating: A  |  Proposed  Seed Rating: R

Water hyacinth | Eichhornia crassipes
Pest Rating: None | Proposed  Seed Rating: None

West Indian Woodnettle |  Laportea aestuans
Pest Rating: C |  Proposed  Seed Rating: N/A

Winged Water-Primrose | Ludwigia decurrens
Pest Rating: A  | Proposed  Seed Rating: P

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