A $10 fee is charged for plant samples. Soil samples (to check for soybean cyst nematode or complete nematode counts, including corn nematodes) cost $15 for Iowa residents and $20 for out-of-state residents. Checks should be made payable to Iowa State University. *When herbicide injury is suspected, the samples should go to the extension weed specialists (see the Weed ID and Herbicide Injury DIagnosis form).
Iowa State University
Flynn, Paula and Engelbrecht, Christine, "General tips for submitting plant samples* to the Plant Disease Clinic" (2005). Integrated Crop Management News. 1453.
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