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WASHINGTON STATE UNIVERSITY
WHITMAN COUNTY EXTENSION'S

Weed of the Month

 

Selected Noxious Weeds of Southeast Washington State
Large PDF File

CALENDAR YEAR
2008

JANUARY 2008
Saltcedar
(Tamarix ramossiuma Ledeb.)

saltcedar

  ventenata FEBRUARY 2008
Ventenata
(Ventenata dubia (Leers) Durieu)
MARCH 2008
Black Henbane
(Hyoscyamus niger L.)
black henbane   viper's bugloss APRIL 2008
Viper's Bugloss
(Echium Vulgare L.)
MAY 2008
St. Johnswort
(Hypericum perforatum L.)

st johnswort      

 

CALENDAR YEAR
2007

JANUARY 2007
White Bryony
(Bryonia alba L.)

w bryony   c thistle FEBRUARY 2007
Canada Thistle
(Crisium arvense L.)
MARCH 2007
Puncturevine
(Tribulus terrestis L.)
puncture vine   r skeletonweed APRIL 2007
Rush Skeletonweed
(Chondrilla juncea L.) 

MAY 2007
Field Bindweed
(Convolvulus arvenisis L.)

Field Bindweed plants with flowers.   Leafy spurge JUNE 2007
Leafy Spurge
(Euphorbia esula L.) 
JULY 2007
Spotted Knapweed
(Centaurea maculosa Lam.)
Diffuse Knapweed
(Centaurea diffuse Lam.)
spotted knapweed   y starthistle AUGUST 2007
Yellow Starthistle
(Centaurea solstitialis L.)
SEPTEMBER 2007
Scotch Thistle
(Onopordum aconthium L.)
s thistle   s cinquefoil

OCTOBER 2007
Sulfur Cinquefoil
(Potentilla recta L.)

 

 
NOVEMBER 2007
Italian Ryegrass
(Lolium multiflorum Lam.)
i ryegrass   h cress DECEMBER 2007
Hoary Cress
(Cardaria draba (L.) Desv.)

CALENDAR YEAR
2006

JANUARY 2006
Downy Brome
(Bromus tectorum L.)
d brome   m thistle FEBRUARY 2006
Musk Thistle
(Carduus nutans L.) 
MARCH 2006
Dalmation Toadflax
(Linaria dalmatica L.)
Yellow Toadflax
(Linaria vulgaris L.)
d toadflax   poison hemlock APRIL 2006
Poison Hemlock 
(Conium maculatum L.) 

MAY 2006
Common Fiddleneck
(Amsinckia micrantha Suksd.)

fiddleneck   jointed goatgrass JUNE 2006
Jointed Goatgrass   (Aegilops cylindrica Host)

JULY 2006
Annual Sowthistle
 (Sonchus oleraceus L.)

a sowthistle   mayweed AUGUST 2006
Mayweed  Chamomile
(Anthemis cotula L.) 
SEPTEMBER 2006
Houndstongue
(Cynoglossum officnale L.)
houndstongue   prickly lettuce OCTOBER 2006
Prickly Lettuce
(Lactuca Serriola L.) 
NOVEMBER 2006
Scotch Broom
(Cytisus scoparius L.)
s broom   b nightshade DECEMBER 2006
Black Nightshade
(Solanum americanum Miller) 
         
 

 

More information on Washington State Weeds here.

For information and questions about weeds/control contact:
Steve Van Vleet or Phone (509) 397 - 6290

 
 
 
 


Contact us: Ken Hathaway, klhathaway@wsu.edu 509-397-6290 | Accessibility | Copyright | Policies
Whitman County Extension, 310 N Main, Colfax, WA 99111 USA