Clinic Services and Information

The ISU Plant and Insect Diagnostic Clinic staff can diagnose plant health problems caused by diseases, insects or the environment. In addition, they also can identify insects, plants/weeds and fungi. Once they have diagnosed your disease or identified your insect pest, they can advise you on the best course of action to take.
Services, forms and fees for Iowa residents

Plant Problem Diagnosis (disease, insect, herbicide, abiotic) PIDC31-Plant Problem Diagnosis Form $20.00*
Plant and Weed Identification PIDC43-Plant Identification Form $10.00
Mushroom Identification PIDC42-Mushroom Identification Form $10.00*
Insect Identification PIDC33-Insect Identification Form $10.00* 
Plant nematodes  PIDC32-Plant Nematode Sample Submission Form $20**-$35** 
* Fee applies to standard morphological and microscopic diagnosis. Contact us before submitting an out-of-state sample for fees and restrictions. Additional fees may apply for specialized media, molecular and serological-based diagnostic methods. We will contact you prior to testing. Checks or cash can be mailed with the sample or we will bill later. Please call us about credit card payment options. 

**Soybean cyst nematode (SCN) egg count $20.00; Nematodes on corn $35.00; Other (i.e. vegetables, turfgrass) $35.00. Fees may be subject to change.

Out-of-state residents

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

Contact Information and Directions

Plant and Insect Diagnostic Clinic
327 Bessey Hall
Iowa State University
Ames, IA 50011
Directions to the clinic from I-35, as well as a map of our location on Iowa State University's campus, can be found here.
Phone: (515) 294-0581
Contact us via e-mail accepted at for general questions, for insect questions, or try our webform 

check out our video What Happens to a Sample at the Plant and Insect Diagnostic Clinic