Soil and Plant Diagnostic Services


About the clinic

The clinic was established in 1965 primarily to support county extension specialists as they sought answers to plant health questions for their local clientele. While most samples still come from county extension offices, the clinic receives samples from agencies, businesses and private citizens.

Initially, the clinic handled only samples submitted for disease identification, but in recent years has handled insect and weed identifications.

Approximately 90 percent of the samples are submitted between May and September.

Nematode samples (other than pine wilt) are handled by the Plant Nematology Laboratory.

The day to day operations of the clinic (receiving samples, answering phones, diagnosis of samples submitted for disease identification and reporting) are handled by staff in the clinic. Other Plant Science Unit Extension Faculty from the departments of Agronomy, Entomology, Horticulture, Plant Microbiology and Pathology handle the identification of insects and weeds as well as assist when needed.

Mission statement

The mission of the clinic is to provide accurate, timely answers and management recommendations to plant health questions and problems encountered by the citizens of Missouri. Management recommendations reflect research-based results and an integrated pest management philosophy.

The mission is accomplished through:

  • Daily operation of the clinic
    • Most samples submitted through the mail, some digital image submissions and personally delivered samples
      • 25 percent of samples submitted through regional extension specialists
      • 75 percent of samples submitted through other agencies, businesses or by private citizens
  • Plant pathology education
    • Training to extension specialists
    • Master Gardener training
    • Contributions to newsletters
    • Conferences and short courses
    • Other invited seminars and presentations

Clinic staff

  • Manjula Nathan
    Director of Soil Testing and Plant Diagnostic Laboratories
  • Simeon Wright
    Coordinator Plant Disease Clinic
    General plant health diagnosis and management

These Division of Plant Sciences faculty support the efforts of the Plant Diagnostic Clinic

  • Kevin Bradley
    Identification of plants and weeds and weed control recommendations, diagnosis of herbicide injuries.
  • Manjula Nathan
    Nutrient, soil analysis and fertility recommendations
  • Bill Wiebold
    Management of cultural problems of field crops
  • Wayne Bailey
    Identification and management recommendations of field crop pests
  • Bruce Barrett
    Identification and management recommendations of fruit, landscape, turf, and vegetable pests
  • Richard Houseman
    Identification and management recommendations of urban and structural pests
  • Brad Fresenburg
    Turfgrass management recommendations
  • Christopher Starbuck
    Identification of woody ornamental plants, management recommendations for cultural problems of woody ornamentals
  • Travis Teuton
    Turfgrass management recommendations
  • David Trinklein
    Management recommendations for cultural problems of greenhouse crops
  • Michele Warmund
    Management recommendations for cultural problems of fruit crops
  • Jeanne Mihail
    Identification of fungal pathogens
  • Jim Schoelz
    Virus testing
  • Laura Sweets
    Management recommendations for diseases of field crops

Updated 6/24/09