Insecticide applications will be most effective if applied against small larvae. Frequently, spot treatments are sufficient. The following materials are listed in order of usefulness in an IPM program, taking into account efficacy and impact on natural enemies. Phytotoxicity may occur on certain sweet corn varieties. This material may be less effective than broad-spectrum insecticides, but it does not destroy natural enemies of corn earworm.
Control is maximized by thorough coverage and by making applications when larvae are small.
For field corn, popcorn, field corn grown for seed, and sweet corn. Apply before brown silk stage. Do not apply within this many days of harvest. Permit required from county agricultural commissioner for purchase or use. The Regents of the University of California.