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Plant Pathology
University of California
One Shields Avenue
Davis, CA 95616-8751
Email: pdc@ucdavis.edu
Phone: (530) 754-9506

Diagnosis Service

To have your sick plant diagnosed:

1. Disease diagnosis from the clinic booth at the "Arboretum Plant Sales"

Please have one or more of the following:
  • Sick plant or diseased section of a large plant
  • Picture of the plant and site
  • Detail description of the problem

2. Contact us through email or by phone to arrange sample diagnosis

Email: pdc@ucdavis.edu
Phone: (530) 754-9506
Contact: Elizabeth JEFFERY (concerning Plant Disease Clinic)

Information we will need:
  • Your name
  • Phone number or email
  • Type of plant or name of plant.
Types of plants:
  • Vegetable and Crops
  • Ornamentals - home and outdoor
  • Trees and Shrubs
  • Turf
Description of problem
Types of diseases
  • Rot
  • Wilt (looks like drought stress)
  • Spots
  • Blight (large or many spots)
  • Canker (enlarged lesion on tree trunks or branches)
Examples of types of plant health problems:
  • Plant died suddenly(wilt)
  • Plant has spots on leaves
  • Parts of plant have brown or black rot (soft or dry)
Woody plants
  • open wound on trunk
  • part to all of leaf canopy dead
Turf
  • area of grass dead (often circular)

2. Based on the type of disease, we can arrange for any of the following:

  • Email/phone consultation
  • Mail in or drop off sample (link to form for sample submission)
  • Site visit