About us

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Plant and Insect Diagnostic Clinic staff diagnose plant health problems, identify insects, plants/weeds, and fungi. Please follow links below for detailed information about our services and how to submit samples.

Services, forms, and fees* for Iowa residents.

Do not send money with your sample, you will receive a statement from ISU after your diagnosis is complete.

Services (follow the link for service and sampling details) Submission Form Fee
Plant Problem Diagnosis (disease, insect, herbicide visual assessment, abiotic) PIDC 45 - Form $20.00*
Plant and Weed Identification PIDC 45 - Form $10.00
Mushroom Identification  PIDC 45 - Form $10.00
Insect Identification PIDC 45 - Form $10.00
Soybean Cyst Nematode (SCN) egg count PIDC 32 - Nematode Form $20.00
Nematode Identification (corn, turfgrass, fruit, and vegetables, etc.)  PIDC 32 - Nematode Form $35.00

* Fee is for standard morphological and microscopic diagnosis. Additional fees may apply for specialized media, molecular and serological-based diagnostic methods. Molecular and serological-based diagnostic methods may be available for additional fee, see details at Plant Problem Diagnosis page.  We will contact you before any additional testing. 

Out-of-state residents

Contact us before submitting an out-of-state sample for fees and restrictions, or contact your local diagnostic clinic on the National Plant Diagnostic Network- NPDN

PIDC Diagnosticians

Dr. Laura Jesse Iles, Director and Entomologist
Dr. Lina Rodriguez-Salamanca, Plant Pathologist
Edward Zaworski, Plant Pathologist