Sample Submission

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, 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.



Plant problem diagnosis (disease, insect, herbicide, abiotic)   $20.00*  
Plant & mushroom ID   $10.00*  
Insect ID   $10.00*   
Plant nematodes    $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.

Forms (Link to PDF download)

Plant Problem Diagnosis

Household Pest Identification

Plant and Weed Identification

Plant Nematode Sample

Mushroom Identification

All samples sent by mail should be addressed to:

Plant and Insect Diagnostic Clinic
327 Bessey Hall
Iowa State University
Ames, IA 50011-3140 USA

For general inquiries we can be contacted by phone or email.

Phone number: (515) 294-0581
E-mail accepted via our webform or at

Submit Plant problem for Diagnosis

Please visit our plant submission information page to learn how to submit your sample for diagnosis.

Submit Insect for Identification

Please visit our insect submission information page to learn how to submit your specimen for identification.

Collecting and submitting a mushroom sample

please see our guidelines to mushroom submission