Lesion Nematodes
scouted Sept. 19, 2024
- Scientific Name
- Pratylenchus spp.
- Background
- Soybeans in Duplin County of variety DynaGro 5.7, 5 5 were scouted, and it was observed that the fields were affected by dieback, yellowing, stunting, root rot, and stem rot. It was observed that some areas have shorter plants than others and have a thin plant stand. The issue appeared earlier in the growing season, and a sample was submitted to the PDIC for diagnosis. The site is a high area, dry and sunny.
- Conclusion
- This issue was identified as Soybean lesion nematode, Pratylenchus spp. These nematodes feed by lysing, or breaking open, cells of the roots, forming cavities. This allows them to migrate intracellularly to continue feeding on healthy tissue. Necrotic lesions can be observed on the root as a result of the damage caused by feeding and movement. When populations are low, above-ground symptoms may not be present, but when populations are high, plants appear stunted, suffer from water and nutrient deficiencies, and eventually dieback.
- Resources
