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 canary-grass 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