Crop & Pest Report


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Plant Diagnostic Lab (6/04/20)

The NDSU Plant Diagnostic Lab is here to help you with your plant pests, diseases, chemical injury, and abiotic disorders.

The NDSU Plant Diagnostic Lab is here to help you with your plant pests, diseases, chemical injury, and abiotic disorders. We processed over 4,200 samples in 2019. The lab has been exceeding expectations and due to our stability, we are able to offer field sample diagnostic services free of charge for Extension personnel, growers/farmers, agronomists, and homeowners. We are excited to assist the public with their plant diagnostic needs during these difficult times. Services available at no charge include routine diagnosis, herbicide injury evaluation (visual only), and plant/insect identification. Our plant pathologists and entomologist will be pleased to provide you with management recommendations. Some exclusions are listed at the end of the article.

Due to COVID-19 and state and federal implementation of social distancing, the NDSU Plant Diagnostic Lab is no longer accepting face to face clients or walk-in consultations. We are still open and accepting samples. For in person sample delivery, please follow provided instructions found on our website or the exterior entry doors of Waldron Hall. We continue to receive samples by mail, but we recommend that clients contact us prior to sending physical samples so we provide guidance for sample collection and shipping. Please contact the lab in advance if you have multiple samples.

Before submitting a sample, please look at our website for information such as our shipping and mailing addresses, our physical location, contact information, submission forms, and a Power Point on how to collect a sample. Please include your location and contact information when submitting a physical sample or a photo for identification or diagnosis. Visit us at:

EXLUSIONS: Sample processing fees are always assessed for phytosanitary testing, seed health testing, crop insurance samples, samples submitted from a non-VA medical provider, and tests which require reagents (PCR/ELISA/DNA sequencing). The NDSU PDL reserves the right to limit the number of fee-waived samples from a client on a case-by-case basis. We will never accrue sample processing fees without your prior approval.

We hope you have a great and productive season.


Jesse Ostrander and the Plant Diagnostic Lab team


Jesse Ostrander

Plant Diagnostician/Director


Christine Ngoan

Seed Health Technician/Research Specialist


Alexander Knudson

Extension Entomological Diagnostician


Presley Mosher

Assistant Plant Diagnostician

This site is supported in part by the Crop Protection and Pest Management Program [grant no. 2017-70006-27144/accession 1013592] from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed are those of the website author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

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