North Carolina State University Partner

SCN is important in North Carolina because: 

  • SCN limits the yield potential of soybeans.
  • It allows for other soilborne pathogens to become more severe.
  • SCN causes significant economic losses through direct injury and costs of controls.
  • Yield losses can occur without above-ground symptoms, and identification without a soil assay can be difficult. root-illustration.png

SCN Distribution

SCN Management Recommendations

There are multiple tactics for managing SCN:

  • Variety selection where possible for HG types within the state
  • Seed treatments for early season management
  • Crop rotations
  • Fumigation or other chemical control measures in severe circumstances

Soil testing tips: 

  • Where in the field? Randomly distributed, zig-zag pattern, or within a “hot-spot”
  • When? 60 days after planting or in the fall
  • How often? Once per year
  • Where should soil test samples be sent?
    NCDA&CS Ag Division Nematode Assay Section
    1040 Mail Service Center
    Raleigh NC 27699-1040
    Physical Address (UPS/FedEx):
    300 Reedy Creek Road
    Raleigh NC 27607
    (919) 733-2655 

What to know about rotating different resistant varieties:

  • Few resistant varieties are available for HG types in NC but should be rotated with a different variety to reduce HG type shifts.

What to know about rotating different sources of resistance:

  • Rotating resistance is important to reduce shifts in HG types to those that overcome each type of genetic resistance.

What to know about rotating to non-host crops:

  • Soybeans should not be planted consecutively, and non-host crops (cotton, corn, etc.) should be used.
  • An ideal rotation would include at least two years out of susceptible soybean varieties.

Other crops that can be hosts for SCN:

  • Phaseolus vulgaris (common bean)
  • Pisum sativum (pea)
  • Vicia villosa (hairy vetch)—Cover crop

Nematode-protectant seed treatments:

  • Protect plants for about 5 weeks from planting
  • Allow plants to gain a good stand

North Carolina State University Experts

Rick Davis | Nematologist

North Carolina State University

919-515-7984

Lindsey Thiessen | Plant Pathologist

North Carolina State University

919-515-3905