Normally occurring in the southeasten counties of Monroe and Lenawee, this insect was found as far north as Saginaw Co. last year, indicating it's northward and westward movement. They also usually have black wing margins and 2 black spots on each wing cover. The adults become active in the spring, feeding on legumes before moving into soybeans. The larvae feed in the soil and may girdle the stem of young soybeans. Serious larval damage is not common.
Plants are most prone to adult feeding injury prior to trifoliate emergence.
When feeding occurs on the tender stems below the cotyledons, the plant may be killed. Injury to the cotlyedons will weaken plants. Small round holes may be eaten from unifoliate or trifoliate leaves. This information is for educational purposes only. References to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned.