Herbicide Injury Symptomology: Amino Acid Synthesis Inhibitor Injury

Sulfonamide or triazolopyrimidine

Trade Names and Uses:

  • Broadstike/Python (Flumetsulam)
    -soybeans, corn
  • Firstrate (Cloransulam)
    -soybeans

Mode of Action: Inhibition of ALS or AHAS enzyme (acetohydroxyacid synthase).

Injury Symptoms: Foliar and soil activity - stunted plant growth, apical dominance broken, and black or red veins, same as imidazolinones and sulfonylureas.

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