Source: NCSU COOPERATIVE EXTENSION SERVICE, 7/25/18


Our online threshold calculator for earworms in podding beans can be found by visiting the Soybeans portal, clicking on Insect Management, then Thresholds, and scrolling down to the online corn earworm in soybean threshold calculator link. Earworm management is critical once there are pods on the plant. Treating prior to bloom: Our official defoliation threshold is 30% defoliation throughout the canopy until bloom or two weeks prior to bloom (depending on how the crop looks) and 15% defoliation after bloom. A good guide to estimating defoliation can be found here: Estimating Soybean Leaf Defoliation.

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