SCN can be scouted and observed visually on soybean roots at appropriate growth stages. However, soil sampling and professional evaluation of samples are usually required to effectively manage this pest.
Most states with SCN are also providing nematology lab services for evaluation of SCN samples for a modest fee. Contact your university ag extension office if you are not sure where to send SCN samples.
Sampling strategies for SCN vary, depending on the history of SCN in the field. Four possible SCN scenarios are: