Plant Diagnostic Clinic

The University of Missouri Plant Diagnostic Clinic (PDC) has been serving Missouri since 1965. We assist county Extension Specialists, commercial businesses and private citizens with their pest problems. The PDC is capable of plant disease diagnosis (including turfgrass) and identification of unknown plants and insects (including arachnids). Besides clinic staff, a diverse group of Plant Sciences faculty specializing in agronomy, entomology, horticulture, or plant pathology assist with identification of pests as needed. The clinic is open year round to receive samples. 


Remote video URL
Watch MU Plant Diagnostic Clinic Sample Submission Instructions on YouTube.

Plant Diagnostic Clinic Submission Instructions

Peng Tian, the director of the University of Missouri Plant Diagnostic Clinic (MU PDC), and Mizzou alumna, Morgan Goodnight, present instructions on how to prepare the plant sample and use the online resources to submit sample information.

The PDC does not test plant nutrient levels, soil characteristics or identify nematodes. Samples submitted to the clinic requiring these tests can be forwarded to the respective lab, at your discretion, additional fees will apply.

The Plant Diagnostic Clinic provides identification and management solutions in a written report for:

  • Plant Disease 
  • Turfgrass Disease 
  • Plant/Weed Species 
  • Insect/Mite Species


Sample highlights: barley yellow dwarf disease of wheat (PDF)

In Missouri, barley yellow dwarf (BYD) is a disease that can infect a wide range of cereal crops, primarily barley, wheat, oats, and rye. The disease is a significant threat to cereal production worldwide.

Sample highlights: wheat spindle streak mosaic virus and soil-borne wheat mosai…

Both Wheat Spindle Streak Mosaic Virus (WSSMV) and Soil-borne Wheat Mosaic Virus (SBWMV) are soil-borne viruses that infect wheat and other cereal crops, causing significant yield losses in many parts of the world.

Sample highlights: wheat streak mosaic virus (PDF)

Wheat streak mosaic virus (WSMV) is a plant virus that infects wheat and other cereal crops, causing significant economic losses in many regions of the world. WSMV is a serious threat to global food security, as it can significantly reduce crop yields and limit the availability of wheat and other cereal crops for food and feed.

1100 University Ave.
28 Mumford Hall
Columbia, MO 65201