Root-knot nematodes
scouted Nov. 4, 2026
- Scientific Name
- Meloidogyne sp.
- Background
- A soybean field in Johnston County was being scouted, and it was observed that 40% of the field was affected by defoliation and dieback. A sample was submitted to the PDIC for diagnosis.
- Conclusion
- Root-knot nematodes were identified as part of the issue. High population levels of root-knot nematodes cause symptoms of non-uniform stunting, wilting, and chlorotic patches, as well as an increased likelihood of disease complexes with other soilborne pathogens and hindrance to water and nutrient uptake. Chemical control is not usually cost-effective in soybeans. The most cost-effective tool in the management of root-knot nematodes is selecting a resistant variety.
- Resources