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.
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
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