Plant Submission

Fill out the Plant Diagnostic Form and provide as much information about the plant and site conditions as you can.

Include photographs if available.

Provide a plant sample showing a range of symptoms that accurately represents the problem. Dead leaves, plants or dead branches no longer contain the source of the problem.

If submitting a weed or wildflower include the whole plant including roots.


Approximately a 4 x 4 inch section that shows both healthy and diseased grass is recommended.

Herbaceous Plants i.e. annuals, most perennials and vegetables

Submit the whole plant including roots. Otherwise include plant sections that exhibit symptoms.

plant spots

Trees and Shrubs

  • Bring in a branch 12-18 inches in length exhibiting the symptoms.


Rhizosphaera needle cast, Rhizosphaera kalkhoffii Symptoms
Photo by USDA Forest Service - North Central Research Station Archive.

Last updated June 3, 2020