There are multiple tactics for managing SCN:

• Soil test to determine if you have SCN
• Soil test to determine the current population level in known infested fields
• Rotate with non-host crops
• Rotate sources of resistance
• Consider using nematicide seed treatments

Soil testing tips:

• Where in the field? Concentrate on headlands, field entryways, field edges, and places where water accumulates.
• When? After soybean harvest is the best time. Sample from directly in the rows.
• How often? Annually in infested fields, every third soybean crop on non-infested fields.
• Where should soil test samples be sent?
  • Kansas State University Plant Disease Diagnostic Lab
    Manhattan, KS
    soiltesting@ksu.edu
    785-532-7897
    Link: https://www.plantpath.k-state.edu/extension/field-crops/soybeans.html

Rotate different resistant varieties:

• Never plant the same resistant variety twice in a known infested field.

Rotate different sources of resistance:

• Rotate sources of resistance if or when they become available.

Rotate to non-host crops:

• Rotating to non-host crops is beneficial, but rotations may need to be longer than one year out of soybeans.

Nematode-protectant seed treatments:

• Nematode-protectant seed treatments have had inconsistent results in Kansas.
• Do not rely on nematode-protectant seed treatments as your sole source of management.
• The best resistant varieties will provide better management than a seed treatment.

Other “need-to-knows” about SCN:

• Assume every soybean field is infested until you take a soil sample to confirm that it is not.
• Higher populations of SCN can be tolerated in fine-textured soils compared to coarser soils.