Corn Nematodes – More Common Than You Think!

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Written by Dr. Mary Gumz, PhD, Pioneer Agronomy Manager

Study Results

  • Pioneer Agronomists, Territory Managers and Sales Professionals took over 2,500 soil samples across the Corn Belt from 2019 to 2021 to assess nematode pressure.
  • 93% of fields sampled had nematodes.
  • Samples were analyzed for 13 species of nematodes.
  • 35% of fields samples had medium to high levels of nematodes which can affect crop growth and yield.
  • Nematodes are widely distributed across the entire Corn Belt.

Chart - Nematode pressure levels across the CornBelt.

  • In this study, Lance, Stubby-root and Spiral nematode were the species most commonly found over damage threshold.
  • 8% of first year corn had moderate to high levels of nematodes compared to 17% of continuous corn fields.

Chart - Nematode infestation levels by corn rotation.

The Western Corn Belt had a higher incidence of medium and high nematode pressure in sampled fields. Spiral, dagger and lesion nematodes were most likely to cause high infestations requiring management. In the Eastern Corn Belt, lance, stubby-root and spiral nematodes were most commonly found in high nematode pressure fields.

Map - Overall nematode pressure - east-central U.S.

Success in 2022 and Beyond...

  • Learn nematode pressure on your farm.
  • Plan for coming years. Nematodes are one problem that will not go away if ignored.
  • If damaging levels of corn nematodes are found, implement control measures such as rotating to soybeans or another crop or use Lumialza™ nematicide seed treatment.

Pioneer Hybrids with Lumialza Nematicide

  • Lumialza nematicide shields roots from yield-robbing nematodes while cooperating with beneficial organisms that improve water and nutrient absorption.
  • National Trials have shown yield improvements of 3.7 bu/A under low pressure and up to 9 bu/a in heavy pressure environments.
  • More than 80 days of root protection.
  • Grows with the plant to protect the entire root system.

Photo - 2018 Delvan, IL - Needle Nematode Pressure - treated vs. non-treated roots.

2018 Delvan, IL - Needle Nematode Pressure


Protect Your Roots From Nematodes

Lumialza™ nematicide seed treatment has shown yield increases of 3.7 bu/A under low nematode pressure and up to 9 bu/A in heavy pressure in national trials.

Protect Your Seed

Logo - Lumialza insecticide seed treatment

Lumialza® may not be registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions. Performance data is based on 10-state broad-acre head-to-head strip trial comparing Lumialza™ nematicide seed treatment vs. non-nematicide seed treatment utilizing the same insecticide and fungicide recipe in seed applied technology replicated and strip trial data. Yields ranged from 3 to 9 bu/a depending on nematode species and population, in 184 low stress and 54 moderate to high stress locations.