carfentrazone (Aim and other trade names)
Rate 0.031 to 0.096 lb ai/A (2.0 to 6.1 oz/A Aim EC)
Time Harvest aid, when 75% of bolls have turned brown, up to day of harvest.
Remarks Apply with MSO or COC at 1 to 2 % v/v, in a minimum of 15 GPA. The addition of AMS may improve efficacy.
Caution Do not exceed 0.096 lb ai/A per season.
Site of action Group 14: protoporphyrinogen oxidase (PPO) inhibitor.
Chemical family Aryl triazinone
flumioxazin (Valor)
Rate 0.048 to 0.064 lb ai/A (1.5 to 2.0 oz/A Valor)
Time Apply after 75% of bolls are brown and no less than 5 days before harvest.
Remarks Apply in 15 to 30 gal/A. Use 1 quart/A methylated seed oil.
Caution Valor is not labeled for this use in all states; see supplemental label for listed states. Preharvest interval is 5 days. Do not exceed 0.092 lb ai/A (3.0 oz/A Valor) per growing season.
Site of action Group 14: protoporphyrinogen oxidase (PPO) inhibitor
Chemical family Diphenylether
glyphosate (several trade names)
Rate 1.125 lb ae/A
Time Apply when flax is mature, but at least seven days before harvest.
Remarks Not all glyphosate labels include this use.
Caution Do not exceed maximum season rate of 6 lb ae/A, including preplant, at planting or preemergence applications. Do not plant crops not listed on the label within 30 days of application. Pre harvest interval is 7 days.
Site of action Group 9: inhibits EPSP synthase
Chemical family None generally accepted
saflufenacil (Sharpen)
Rate 0.022 to 0.044 lb ai/A (1.0 to 2.0 oz/A Sharpen)
Time Apply when 70% to 80% of bolls are brown. It may take up to 7 days for optimum desiccation.
Remarks Flax is listed under oilseed crops, subgroup 20A. Use methylated seed oil plus ammonium-based adjuvant.
Caution Do not apply to crops grown for seed. Preharvest interval is 3 days.
Site of action Group 14: protoporphyrinogen oxidase (PPO) inhibitor
Chemical family Uracil (pyrimidinedione) amide