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University of Illinois Extension

Amino Acid (ALS) Inhibitor Herbicide Injury

Chlorimuron (ALS) herbicide drift on Russian sage.

Chlorimuron (ALS) herbicide drift on Russian sage.  


varies (1 = very little damage 5 = plants killed)


Mostly affects broadleaf plants; however, some grassy plants can also show injury.

The list below of specific plants is NOT all inclusive. It reflects the authors' experience as well as University of Illinois herbicide injury research trial results.  


These herbicides inhibit key enzymes in various amino acid synthesis pathways.

Characteristics of activity:

Symptoms of injury:


Filed under problems: Herbicide Injury

More information is available on Hort Answers.