2,4-D LV ester
Rate 5 lb ae 2,4-D in 100 gal water
Time Apply in the early bloom stage.
Remarks Foliage must be thoroughly wet.
Caution Avoid drift to sensitive crops.
Site of action Group 4: synthetic auxin
Chemical family Phenoxy acetic acid
glyphosate
Product labeled for aquatic sites
Rate 5% solution of a 4 lb ae (5.4 lb ai) glyphosate
Time Apply prebloom or in the fall.
Remarks Use a nonionic surfactant recommended for aquatic sites
Caution Glyphosate is nonselective and may injure or kill desirable species.
Site of action Group 9: inhibits EPSP synthase
Chemical family None generally accepted
imazapic (Plateau)
Rate 0.188 lb ae/A
Time Apply postemergence at the late boot or bloom stage.
Remarks Use a methylated seed oil at 1 quart/A; do not exceed 25 gal/A spray volume.
Caution Before using, note crop rotation restrictions.
Site of action Group 2: acetolactate synthase (ALS) inhibitor
Chemical family Imidazolinone
imazapyr (Habitat)
Rate 0.75% v/v product
Time Apply prebloom or in the fall.
Remarks Use a surfactant the label recommends.
Caution Before use, note rotation and other restrictions on label
Site of action Group 2: acetolactate synthase (ALS) inhibitor
Chemical family Imidazolinone
metsulfuron (Escort and others)
Rate Escort: 0.6 ai/A (1 oz/A)
Time Apply to actively growing plants.
Remarks Use a surfactant to increase effectiveness. Application sites differ among products; consult labels.
Caution Apply only to pasture, rangeland, and non-crop sites.
Site of action Group 2: acetolactate synthase (ALS) inhibitor
Chemical family Sulfonylurea