Plant and Insect Diagnostic Clinic
The PIDC will be closed from December 24 to 26 and on January 1. Staff may be working remotely between December 23rd and January 1st to spend time with family during the holidays. Please email us if you would like to mail or drop off samples during this period.
Starting January 1, you may not receive an automated email with your sample number after it has been received and logged, due to new digital accessibility requirements and our system's inability to support digitally-accessible automated emails. We apologize for the inconvenience. Please email us to get an update on the status of your sample; most samples are diagnosed within two weeks of receipt.
Services We Offer
Here are the types of samples we accept for diagnosis:
- Whole plants or plant part problems
- Identification of insects, spiders, ticks, mites, and other arthropods from outdoors/indoors
- Soybean cyst nematode egg counts
- Complete soil nematode counts
Services We Do NOT Offer
- Weed/plant identification (contact your local Extension office for help)
- Tick disease testing
- Mushroom identification
- Pesticide residue testing
- Soil and plant nutrient analyses
- Insects or arthropods causing skin irritation in humans or animals
- Herbicide resistance testing
What We Do
Iowa State University Plant & Insect Diagnostic Clinic is supported by funding from ISU Extension & Outreach, ISU Department of Horticulture, ISU Department of Plant Pathology, Entomology, & Microbiology, ISU Integrated Pest Management, and the National Plant Diagnostic Network.