Brackenfern, western (Pteridium aquilinum)

asulam (Asulox)

Rate 1.6 to 3.3 lb ai/A

Time When bracken is in full frond.

Remarks Apply on uncultivated land, reforestation sites, and Christmas tree plantations only. Asulam has a half-life of 6 to 14 days in soil.

Caution See label for precautions.

Site of action Group 18: inhibits DHP synthase step

Chemical family Carbamate

dicamba (Rifle or Clarity)

Rate 4 to 8 lb ae/A

Time Apply in late winter before fronds emerge.

Remarks Management for maximum crop competition aids control. Will not control grasses.

Caution Avoid drift to sensitive crops. Clover stands may be reduced or eliminated in pastures.

Site of action Group 4: synthetic auxin

Chemical family Benzoic acid


Rate 2.25 to 3 lb ae/A or a 1 to 1.5% solution when using hand-held equipment

Time When bracken fronds are at least 18 inches long.

Remarks Adequate foliar coverage is necessary.

Caution Glyphosate controls grasses in the treated area as well as other vegetation.

Site of action Group 9: inhibits EPSP synthase

Chemical family None generally accepted