Canarygrass, reed (Phalaris arundinacea) and ribbongrass (Phalaris arundinacea var. picta)

fluazifop (Fusilade DX)

Rate 0.25 to 0.375 lb ai/A (1 to 1.5 pints/A)

Time Apply to actively growing reed canarygrass.

Remarks Apply with 1% v/v crop oil concentrate or 0.25% v/v nonionic surfactant. Acts very slowly, taking at least 2 weeks and often 4 weeks to show effectiveness. Do not apply to stressed grasses. If weed regrows, repeat application.

Caution Do not use crop oil concentrate if treating reed canarygrass in ornamentals. Do not apply if rain is expected within 1 hour.

Site of action Group 1: acetyl CoA carboxylase (ACCase) inhibitor

Chemical family Aryloxyphenoxy propionate


Rate 1.2 to 2.25 lb ae/A

Time Apply to actively growing plants at early heading or in fall from mid-September to after first light frost.

Remarks Check label regarding using a surfactant.

Caution Glyphosate controls other vegetation in the treated area.

Site of action Group 9: inhibits EPSP synthase

Chemical family None generally accepted

imazapyr (Habitat or Arsenal)

Rate 0.5 to 1 lb ae/A

Time Apply in boot stage through fall, when plant is actively growing.

Remarks Habitat is labeled for aquatic sites. Arsenal is labeled for rangeland, pasture and non-cropland use only. Always add the appropriate surfactant.

Site of action Group 2: acetolactate synthase (ALS) inhibitor

Chemical family Imidazolinone

sulfometuron (Oust)

Rate 2.25 to 3.75 ai/A (3 to 5 oz/A)

Time Preemergence to early postemergence.

Remarks Recommended for use on non-cropland only. Do not apply to frozen ground. Constantly agitate while mixing in spray solution. Add 0.25% v/v nonionic surfactant to increase activity of postemergence applications. Apply with ground equipment in at least 15 gal/A carrier.

Caution Keep sulfometuron out of cropland. Use equipment dedicated to non-cropland uses only. Do not treat powdery, dry soils or light, sandy soils if rain is not likely after treatment.

Site of action Group 2: acetolactate synthase (ALS) inhibitor

Chemical family Sulfonylurea