Soil Testing and Plant Diagnostic Services


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Plant Nematology Laboratory

Nematodes Nematodes Nematodes

Above left, cysts of Heterodera glycines, the soybean cyst nematode. Center, a broken cyst, containing hundreds of nematode eggs. Right, a juvenile form of the soybean cyst the nematode, Heterodera glycines.

The Plant Nematology Laboratory tests soil and plant samples qualitatively and quantitatively for the presence of plant-parasitic nematodes. We strive to provide accurate, unbiased and timely results on all samples received. Recommendations are provided for management strategies to reduce the effect of plant-parasitic nematodes on plant growth and yield.

Available tests

  • Soybean cyst nematode (SCN) egg count
    $20 per sample
  • Plant-parasitic nematode identification
    $30 per sample
  • Soybean cyst nematode (SCN) modified HG type (race) test
    $75 per test, in-state
    $125 per test, out-of-state
  • Soybean cyst nematode (SCN) full HG type (race) test
    $100 per test, in-state
    $150 per test, out-of-state
  • Quarantine samples
    $30 per sample

Note for HG type testing
For Missouri soybean producers, we recommend a modified HG type test, which includes indicator lines representing the predominant sources of SCN resistance available in Missouri. A full HG test is available upon request.

Tomato with root knot nematodes Unexplained soybean yield losses? SCN could be the culprit. Soybean producers who experience unexplained yield losses should test their fields for SCN, which can cause yield losses up to 30 percent in absence of above-ground symptoms.

Magnified 100 times and stained to be visible, juvenile soybean cyst nematodes infect a soybean root. The juveniles will form feeding sites and rob nutrients from the plant Magnified 100 times and stained red to be visible, these juvenile SCNs have infected a soybean root. The juveniles will form feeding sites in the root and rob nutrients from the plant.

Tomato with root knot nematodes Does your garden have root-knot nematode?
Root-knot nematodes are microscopic, aquatic roundworms that can infect vegetable roots causing serious symptoms and producing galls or "knots" on the roots. These nematodes can restrict the uptake of water and nutrients into the plant.

The picture to the right depicts healthy tomato roots versus root-knot nematode infected roots, and shows how damaging these nematodes can be to roots.

Updated 5/12/15