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Questions and Answers on Soybean Cyst Nematode
Q. Where in ND has SCN been confirmed?
A.
SCN has been confirmed in fields in Richland and Cass County. Even though other
counties have not been confirmed, it does not
mean that it is not present in those counties.
Q. What can I do to prevent the spread of SCN into my soybean fields?
A. Preventing the spread of SCN is virtually impossible. Movement of infested soil can be done in a variety of ways (eg. migratory birds, wind, flooding, etc.). If you know that you have an SCN-infested field, then washing off equipment and harvesting that field last may slow down the spread of SCN a little bit, but the spread is likely inevitable.
Q. Is soybean the only crop that is affected by SCN?
A. No, a few other legume crops may be affected as well. From research conducted by Dr. Berlin Nelson at NDSU, we know that SCN can reproduce very well on dry edible bean plants, but we don't know what type of impact SCN has on dry bean performance.
Q. Is there anything I can do now to manage SCN?
A. Yes, sending soil samples to a lab to check for presence and numbers of SCN will help you know which fields are infested and how large the populations are in those fields. Agvise and the NDSU Plant Diagnostic Lab are two regional labs that can do SCN analysis.
Q. Do I have to stop growing soybean now?
A. No, but growing back to back soybeans is probably not a good idea either. Crop rotation with non-hosts (corn, small grains, etc.) will reduce the SCN population in a field. Growing an SCN-resistant soybean variety will reduce the SCN population (compared to growing a susceptible variety) and will perform better than a susceptible variety. New SCN-resistant varieties are now available from many seed companies for the maturity groups grown in the Southern Red River Valley. SCN has been present in the lower Midwest for several years, and soybean growers there have been able to manage the disease and be productive.
Q. Are there any nematicides that control SCN?
A. No, nematicides do not provide season-long control of SCN, and many are too expensive to be economical for soybean production.
Q. Where can I find more information about SCN?
A.
Check out these webpages:
http://www.ndsu.nodak.edu/soydiseases/cyst.shtml
http://www.planthealth.info/scn_basics.htm
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