Soybeans were scouted at the VC (cotyledon) growth stage and darkening of the roots were observed. These particular plants in this environment were collected from a row without the application of an in-furrow fungicide (Fluopyram). This was due to equipment issues. In areas where the in-furrow fungicide was applied, no symptoms were observed.
This issue was confirmed by the NC State Plant, Disease and Insect clinic to be Fusarium Root Rot. Dry soils earlier in the season could have contributed to the severity of symptoms. There are not options to remedy this issue in this season but varietal selection and subsequent use of fungicide seed treatments at planting dates earlier than mid-May are warranted in subsequent years.