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Early-Season Establishment of Trichogramma ostriniae for Season-Long Suppression of European Corn Borer in Sweet Corn 1997

Project Leader: Dr. Mike Hoffman

Objectives:

1. Evaluate early-season releases of Trichogramma ostriniae for on-farm establishment and season-long suppression of ECB in fresh-market sweet corn.

2. Monitor between-field dispersal of released Trichogramma ostriniae.

Results:

Early-season inoculative releases of Trichogramma ostriniae in sweet corn resulted in parasitism of European corn borer egg masses up to 80 days after release, indicating successful reproduction and establishment on farm. Within- and between-field dispersal of the parasitoid was observed over distances of at least 300 feet. These results indicate the potential for these kinds of releases to help control ECB in sweet corn over the duration of a season.