There are multiple tactics for managing SCN:

• Crop Rotation
• Host Plant Resistance
• Nematicides: Fumigants and Seed-Applied Non-Fumigants
• Tillage Practices
• Agronomic Practices

What to know about rotating different resistant varieties:

• Soybean varieties with resistance to SCN or root-know nematode are not resistant to all biotypes of SCN or species of root-knot nematode.
• Soybean varieties are often only resistant to one or two SCN biotypes or species of root-knot nematode, thus resistant varieties should be selected based on biotype or species or root-knot nematode on a field by field basis.
• Tolerance is not a “type” of resistance and growing tolerant varieities sustains or, with some varieities, increases nematode population densities.

What to know about rotating different sources of resistance:

• There are limited sources of resistance to many of the SCN biotypes and to southern root-knot nematode in commercial soybean varieties.
• Some soybean varieties with the same genetics are marketed with a different variety of names by different seed companies, but all contain the same source of resistance to SCN.

What to know about rotating to non-host crops:

• Crop rotation with any crop other than soybean is an excellent way to manage populations of SCN.
• Corn, cotton, soybean, and some grain sorghum hybrids are poor rotation crops for southern root-knot nematode as they can maintain or in some cases increase nematode population density.
• Rice is an excellent rotation crop for both root-knot and SCN in fields where a flood is maintained for the majority of the cropping season.
• Peanut is an excellent rotation crop for both southern root-knot and SCN.
• A rotation sequence of 2 to 3 years out of soybean may be required to reduce SCN population densities below damage threshold.

Nematode-protectant seed treatments:

• There are several seed-applied nematicides, made up of both chemical and biological active ingredients, marketed for use against soybean nematodes.
• Seed-applied nematicides may provide some protection of the developing seedling, but do not provide season-long nematode control.
• Seed treatments are most beneficial when used in areas with a low population density of SCN and when paired with moderately resistant cultivars.