Handling Samples

  • Make certain that all information requested is included on the nematode assay form that you will receive with the assay packet. This information is needed to identify the sample and to aid in interpreting assay data. If you collect more than one sample, you must assign a field number to each area sampled and place that number in the appropriate area of the form. Each plastic bag should be sealed tightly by tying it with the twist tie found in the bag. A separate assay packet must be used for each composite sample.
  • Keep the samples out of direct sunlight to avoid overheating. The samples may also be damaged by heat if they are stored in the trunk of a car or other hot location. Use a Styrofoam cooler to keep the samples cool. Heat kills nematodes, and dead nematodes are unsuitable for identification.
  • After completely filling out the assay forms and sealing the plastic bags, place the samples in a suitable container and send or bring them promptly to:

    Penn State Nematode Diagnostic Service
    Fruit Research and Extension Center
    P.O. Box 309, 290 University Drive
    Biglerville, PA 17307
    Phone: 717-677-6116

  • A $15.00 fee is charged for each sample sent to the lab. Payment in full by check must accompany each sample. Cash cannot be accepted, and there will be no billing. Please make all checks payable to The Pennsylvania State University.


An assay report will be returned for each submitted sample, stating the numbers and kinds of important plant-parasitic nematodes that were detected. The report will also comment on the need for nematode control.