University of Illinois

No. 11/June 6, 1997

Foliar Insecticides and Postemergence Corn Herbicides

Recent developments of insect problems in corn may result in some cornfields being treated with foliar-applied organophosphate insecticides. Keep in mind that the labels of several postemergence corn herbicides (specifically, ALS-inhibiting herbicides) contain application restrictions for corn recently treated with a foliar-applied organophosphate insecticide. These restrictions specify that a certain interval must occur before the herbicide is applied. Label statements from these herbicides are listed below.

Accent, Basis, and Basis Gold: Apply insecticide at least 7 days prior to or 3 days after the application of Accent, Basis, or Basis Gold.

Hornet: Apply insecticide at least 10 days prior to or 10 days after application of Hornet.

Scorpion III:
Apply any insecticide (not limited to OP insecticides) at least 7 days prior to or 7 days after application of Scorpion III.

Beacon and Exceed: Do not apply insecticide within 10 days prior to or 7 days after application of Beacon or Exceed.

Permit: No insecticide restrictions on label.

Lightning and Resolve: No restrictions regarding foliar insecticide applications.

Aaron Hager, and Marshal McGlamery, Department of Crop Sciences, (217)333-4424