The soybean cyst nematode (SCN) is one of the most important pests of soybeans in the United States. It was first found in the U.S. in North Carolina around 1954. It was most likely introduced by soil brought over from China in the late 1800's to obtain bacteria for the purpose of nodulating soybean roots. SCN now occurs in all major soybean producing areas and can be responsible for sizeable yield loss across these areas if not identified and managed.  Damage from SCN is not limited to yield loss from root feeding. The damage caused also aids in the development of other root and stem diseases which can also contribute to yield loss. It is possible to have a 30 percent yield loss or more without the soybean crop looking noticeably damaged during the growing season. Therefore, it is important to sample for SCN periodically to confirm its presence in each field and help determine management strategies once SCN has been identified. 

Once SCN is established in a field it cannot be eradicated. Therefore, managing SCN is extremely important. This can be difficult since no single management tactic will control SCN. Utilizing several management strategies can help minimize yield loss. Management recommendations usually vary based on the SCN population density in the soil. For more detailed information about soybean management and SCN management please go to http://www.soybeanmanagement.info/