A part of the College of Agriculture, Food and Natural Resources
Click on the photos for more information and a larger view.
Mode of Action: Inhibition of ALS or AHAS enzyme (acetohydroxyacid synthase).
Injury Symptoms: Soil and foliar activity - kills slowly, loss of apical
dominance, chlorosis, and shortening of internodes. Grass plants may be stunted with
chlorosis or purpling. Corn plants may be stunted and show symptoms of root inhibition
such as pruning of lateral roots. Leaves emerging from the corn whorl may not unfurl
properly and be yellow to translucent in appearance. Broadleaf plants may be stunted and
chlorotic or purple. Soybean injury can range from stunting to death of terminal growing
point. Soybean leaves may be yellow in appearance and leaf veination may appear red or
purple in color.
Weed Science Homepage | Herbicide Injury Homepage | Herbicide Injury Index