Herbicide Injury Symptomology: Amino Acid Derivative Injury

Trade Names and Uses:

• Liberty (Glufosinate)
  -Liberty Link crops
• Roundup Ultra (Glyphosate) / Touchdown (Glyphosate trimesium)
  -burndown or Roundup Resistant crops

Injury in Corn

Mode of Action: Glyphosate and glyphosate trimesium inhibit EPSP synthase; glufosinate inhibits glutamine synthase.

Injury Symptoms: Glyphosate and glyphosate trimesium: new growth turns yellow, then brown and dies within 10 to 14 days. Glufosinate symptoms are much quicker (2-4 days).

Injury in Soybean

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