Remarks Plants are highly poisonous to both animals and humans.
Caution Do not graze treated areas until plants dry up after spraying. Avoid drift to sensitive crops.
2,4-D (various products)
Rate 0.25 lb ae/A
Remarks Reported to control this plant, although data are lacking in the Pacific Northwest. Follow label instructions.
Site of action Group 4: synthetic auxin
Chemical family Phenoxy acetic acid
linuron (Lorox)
EPTC (Eptam)
Rate 4 to 6 lb ai/A. Use 6-lb rate on finer soils or on heavy mats of roots and rhizomes.
Time Apply in spring or early fall on a thoroughly prepared seedbed.
chlorsulfuron (Telar)
Idaho and Washington only
Rate 1.5 to 2.25 oz ai/A (2 to 3 oz/A Telar)
Time Apply to actively growing yellow toadflax in the bud to bloom stage.
Remarks Suppresses yellow toadflax. Selective to grasses. Use a penetrating surfactant. Spray to wet.
2,4-D
Rate 1.5 to 2 lb ae/A
Time Spring or fall.
Remarks Use fall treatments to control rosettes of these biennial weeds. Use spring treatments before flower stalk elongates. Annual treatments are needed to control seedlings. Pasture legumes are injured or eliminated at these rates.
clopyralid (Transline or Stinger)
Rate 0.125 to 0.25 lb ae/A (0.33 to 0.66 pint/A)
Time Apply to rosettes
Remarks Consult labels for specific site registrations.
2,4-D
Selective treatment in grain and grass crops
Rate 1 to 1.5 lb ae/A
Time Apply at the early bud stage of thistle. May require repeated applications.
Remarks Do not apply to grass or grain crops before tiller stage or from early boot to dough stage. The 1.5 lb/A rate can injure wheat.
aminocyclopyrachlor + chlorsulfuron (Perspective)
Rate 1.8 to 3.2 oz/A aminocyclopyrachlor + 0.7 to 1.3 oz/A chlorsulfuron (4.5 to 8 oz/A of product)
Time Apply to actively growing plants in spring.
2,4-D amine
Rate 1 lb ae/A
Time Apply to rosette stage in fall or spring.
Remarks Treating after teasel begins to bolt may not be effective.
Caution Avoid drift to sensitive crops.
Site of action Group 4: synthetic auxin
aminocyclopyrachlor + chlorsulfuron (Perspective)
Rate 1.8 to 3.2 oz/A aminocyclopyrachlor + 0.7 to 1.3 oz/A chlorsulfuron (4.5 to 8 oz/A of product)
