|
Oklahoma State University Stillwater, OK |
|
Oklahoma Alfalfa |
|
|
|
Oklahoma State University Stillwater, OK |
|
Oklahoma Alfalfa |
|
|
Russian Thistle |
|
| COMMON NAME: | Russian Thistle |
| SCIENTIFIC NAME: | Salsola iberica Sennen & Pau |
| TYPE: | Annual Warm-season Broadleaf Weed |
| DESCRIPTION | |
| Germination: | February to May. |
| Reproduction: | By seeds in late summer. |
| Stems: | Profusely branched, 1 to 3 feet high, forming typical ball-like tumbleweeds at maturity. |
| Leaves: | Short, stiff, prickle-pointed. |
| Flowers/ Inflorescence: |
Greenish, inconspicuous in leaf and stem axils. |
| Fruit: | Utricle with calyx enclosing yellow coiled seed. |
FOUND: |
Russian thistle is found in small grains, alfalfa, fence lines and other waste areas. Problems occur with spring-planted alfalfa and thinning older alfalfa stands in northwestern Oklahoma. |
CONTROL: |
Control results with BUTYRAC 200 have been variable. Fair to good control has been obtained with PURSUIT. It is important to treat weeds when they are small and actively growing with both herbicides. |
| Jim Stritzke Former Alfalfa Weed Control Specialist Department of Plant and Soil Sciences Oklahoma State University |
|
