Corn Earworm Damage

scouted May 16, 2024

Background
Soybeans were scouted at the V5 growth stage and foliage defoliation was observed. Damage was estimated to be less than 10% throughout the canopy, and was not widespread across the field. When scouted, corn earworms were present.
Conclusion
This injury was confirmed by an NC State Extension Specialist as damage from corn earworms. Corn earworms may feed on foliage, flowers, and fruit. At this growth stage of the soybean, the larvae are only feeding on the leaves. Major yield loss can come into play when large corn earworm larvae coincide with soybean seed that has achieved almost full size. In this environment, injury did not reach or surpass economic threshold but continued scouting is recommended. However, if damage continues the use an insecticide would be beneficial.

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