The robust threshold recommendations for corn earworm that were developed to effectively manage this pest in North Carolina were developed with determinate soybean varieties. The adoption of indeterminate varieties produced in this state increases, especially as seed companies develop indeterminate soybean varieties in maturity groups where this growth habit has been traditionally unavailable, like maturity group 5. Preliminary work indicates that thresholds likely should not vary between determinate and indeterminate varieties. This research seeks to determine if corn earworm infestation timings vary for the indeterminate soybean varieties relative to determinate varieties based on when and where they lay eggs. It continues to explore if thresholds should vary or if scouting recommendations should differ.

Key Benefactors:
farmers, agronomists, extension agents