Herbicide Injury: Nicosulfuron/Rimsulfuron (ULTIM) injury on Corn
ULTIM injury on corn.
Sulfonylurea (ALS) injury on
corn often appears as a "flash" on the leaf. Typically,
corn outgrows this level of injury. Symptoms can include a yellow
discolouration of the leaves, yellow flash on leaf (shown), sunting
of the plant, a delay in plant development and crinkled leaves or
bleaching near the whorl. Onion-leafing or a purpling of stem of
leaves may aslo occur. Some ALS herbicides may also reduce the root
mass by shortening lateral roots. These herbicides should not be
applid to corn that has been treated with an organophosphorus insecticide
due to the increased risk of injury.
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