Diagnostic Tests and Fees

General Identification Services:

General Plant Disease Identification: Test fees waived for in-state / $20 for out-of-state

Plant disease diagnosis is our most frequently requested service. The service includes overall evaluation, including microscopic exam, results from a moist chamber, isolation on artificial nutrient media, hypertensive response, and identification of fungi or bacteria to genus. Viruses are diagnosed using serology. Management recommendations are sent by email at a minimum of one week from the time we receive the plant material. More information about this test can be found here.

Specialized Identification Services:

  • Nematode testing

    • Garlic Bloat Nematode Testing: $20 per sample for in-state / $50 for out-of-state — Garlic bulbs are screened for Bloat nematode, White rot, and Botrytis neck rot. Any other fungus, bacteria, virus or Acari (mites) will be noted in the report. A minimum of five bulbs are required. More information about this test can be found here.
    • Beech Leaf Disease: $45 per sample / $20 each additional sample submitted at the same time — Plant tissue will be tested for Litylenchus crenatae ssp. mccannii by conventional PCR.
  • Fungus testing

    • Verticillium wilt testing of soil: $30 for in-state sample / $50 for out-of-state — Assaying field soil for the presence of Verticillium. This service analyzes the soil samples for propagules of the fungus Verticillium dahliae. We suggest a minimum of 5 samples per acre in order to get a reasonable representation of the field. This test takes a minimum of 4 weeks.
    • Verticillium wilt: $35 per sample / $20 each additional sample submitted at the same time — Plant tissue will be tested for Verticillium dahliae fungi by qPCR.
    • Colletotrichum spp: $35 per sample / $20 each additional sample submitted at the same time — Plant tissue will be tested for Colletotrichum spp. fungi by qPCR.
  • Bacterium testing

    • Phytoplasma: $45 per sample — Plant tissue will be tested for the genus Phytoplasma by qPCR.
    • Fire blight: $35 per sample / $20 each additional sample submitted at the same time — Plant tissue will be tested for Erwinia amylovora bacteria by qPCR.
  • Virus testing

    • Tomato brown rugose fruit virus
      • Seed testing: $75 per sample (requires a minimum of 10g of seed for tomato and 20g of seed for pepper).
      • Plant tissue: $45 per sample — Plant tissue will be tested for tomato brown rugose fruit virus by reverse transcription qPCR.
    • Dahlia Mosaic Virus / Dahlia Common Mosaic Virus: $30 per sample — An AmpliFire fluorometer will be used to conduct isothermal DNA detection and identification following the Agdia protocol for DMV/DCMV.
    • Potato Virus Y strain testing: $45 per sample — Plant tissue will be screened for the most common PVY strains.
    • Potyvirus: $45 per sample / $20 each additional sample submitted at the same time — Plant tissue will be tested for the genus potyvirus by conventional reverse transcription PCR.
  • Water mold testing

    • Phytophthora spp: $45 per sample — Plant tissue will be tested for the genus Phytophthora by ELISA (enzyme-linked immunosorbent assay)