Common crops affected
- Cotton
- Vegetables
- Soybean
- Sweet potato
What is it?
Reniform nematode is a semi-endoparasite: the female embeds her head in the root while her kidney-shaped body remains outside, feeding continuously. It is one of the most damaging nematodes of cotton in the southern US and also attacks vegetables, soybean and pineapple.
How to identify it
- No distinctive above-ground galls (unlike root-knot) — symptoms are easy to miss.
- Patchy, stunted, uneven stands and reduced vigour, often worse in lighter or sandy-loam soils.
- Wilting under heat/drought despite adequate moisture; nutrient-deficiency-like symptoms.
- Confirmation requires a soil assay (egg/juvenile counts); reniform builds high populations quickly.
Life cycle & spread
Young females penetrate roots and feed; populations build rapidly across the season and survive between crops in soil and on roots. Warm soils accelerate reproduction.
Conditions that favour it
Warm soils, continuous susceptible cropping (especially cotton-on-cotton), and lighter-textured soils favour build-up.
Damage and how it spreads
Impairs water and nutrient uptake, reducing yield — often without obvious above-ground signs until losses are significant. In cotton, effective nematode control can recover meaningful lint yield in infested fields.
Monitoring & scouting
Soil-sample problem areas (counts before planting guide decisions); map field history; act at planting where assays or history show pressure.
How to control it
- Treat at planting before populations damage establishing roots;
- rotate to non-host or resistant crops;
- support root-zone health.
- Because nematodes can't be 'cured' mid-season once roots are damaged, prevention and at-plant timing matter.
Recommended Vegalab solution: Nematode Control
Nematode Control — natural, OMRI-listed nematicide (geraniol) applied at planting in-furrow or through drip irrigation to reduce reniform populations on contact in the root zone; a second mid-season application is an option under high pressure. - Charge Bioboost — soil inoculant applied at planting to support a healthy, biologically active root zone and help roots withstand nematode pressure.
| Role | Product | Use |
|---|---|---|
| Primary control | Nematode Control | |
| Also apply | Charge Bioboost |
Preventing it next season
Rotation to non-host/resistant crops, soil sampling to guide decisions, at-plant treatment, and root-zone health support.
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