Frequently Asked Questions

1. When is the best time of year to sample for SCN?

• Collecting Soil Samples for Soybean Cyst Nematode Analysis [pdf]

2. Where can I get a SCN soil analysis?

• Soybean Cyst Nematode Analysis Form

3. What role do weeds play in SCN and its management?

• Potential for Soybean Cyst Nematode Reproduction on Winter Weeds and Cover Crops in Tennessee
• Winter Annual Weeds and Soybean Cyst Nematode Management (Purdue) [pdf]

4. I heard that SCN can now reproduce on many of the varieties we thought were resistant. What are we supposed to do?

• Plant Management Network articles
  http://www.plantmanagementnetwork.org/pub/php/research/2008/virulence/
  http://www.plantmanagementnetwork.org/sub/php/research/2008/scn/

5. Are soybean breeders looking for alternative sources of SCN resistance?

• http://agronomyday.cropsci.illinois.edu/2006/tour_a/SCN/

6. Does wheat production impact SCN and its management?

• Plant Pathology Fact Sheet: The Value of Wheat Residue in Soybean Cyst Nematode Management Programs [pdf]

7. What is an HG type test and if I have SCN on my farm is it necessary to have an HG type test?

• SCNGuide_5thEd12-13.pdf

8. What is being done to assure that HG type test results are uniform from one lab to the next?

• A Standard Greenhouse Method for Assessing Soybean Cyst Nematode Resistance in Soybean: SCE08 (Standardized Cyst Evaluation 2008)

9. Why are SCN numbers variable?

• SCNGuide_5thEd12.pdf

10. Can I ever eliminate SCN?

• SCNGuide_5thEd13.pdf

11. Can SCN be controlled by chemical sprays?

• SCNGuide_5thEd15.pdf

12. How important is crop rotation in managing SCN populations?

• SCNGuide_5thEd14-15.pdf

13. Can SCN cause major yield losses, but without any visible symptoms?

• SCNGuide_5thEd9.pdf