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Pest & Disease Library · Solutions

Root-Knot Nematode Control in Cucumber

Cucurbits are highly susceptible to root-knot nematodes, and warm, continuously cropped greenhouses and tunnels are especially at risk. Galled roots limit water uptake just as the vine carries a heavy fruit load, so symptoms often appear suddenly at peak production.

Common crops affected

Why it matters

Galled roots can't feed the plant — stunting, wilting, and yield loss follow, and the wounds invite secondary soil pathogens. Nematodes are hard to eradicate once established, so early, targeted control protects the crop and the soil.

When to act

Apply at transplant and establishment; in continuous houses, treat between crops and at each new planting.

What to look for

  • Midday wilting that eases overnight and worsens over days
  • Stunted vines with pale, undersized leaves
  • Galls on fine roots at pull-up
  • Fewer, misshapen, slow-filling fruit

How to manage it

  1. Rotate with non-host or resistant crops in known hot spots.
  2. Build organic matter and soil biology.
  3. Use clean transplants; sanitise tools and avoid moving infested soil.
  4. Apply Nematode Control via soil irrigation, before or at planting and where infestation exists.

Recommended Vegalab program

Nematode Control — encapsulated geraniol that activates in the root zone, fitting protected-culture programs with zero PHI and zero REI.

RoleProductUse
Primary controlNematode ControlSoil-applied natural nematicide (irrigation)
Root recoveryRoot BoostRebuild damaged roots
Soil biologyCharge BioboostSuppressive soil biology

Product claims, rates, and availability vary by jurisdiction; always follow the applicable label.

Frequently asked questions

Does it work in substrate systems?

It targets soil and soil-less root zones — follow the label for substrate and recirculating setups.