Plant Diagnostic Lab


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Pesticide Information

Pesticide Information

NDSU Fungicide Guide

NDSU Weed Guide

NDSU Insecticide Guide

The NDSU Plant Diagnostic Lab does not offer chemical residue analysis for herbicides or other possible contaminants. We offer herbicide injury evaluation based on visual symptoms only.

In cases where a known specific herbicide is suspected to have caused injury, symptoms can often be visually evaluated to determine if they are consistent with exposure to the specific suspected herbicide.

In cases where a herbicide injury is suspected but the applied herbicide is not known, a visual evaluation for herbicide injury may not be able to determine precise chemistry, and it may not be definitive. However, herbicide chemical families can sometimes be identified based a visual analysis alone. A visual evaluation can be helpful if it can narrow chemical possibilities to help reduce costs in circumstances that require more rigorous chemical residue testing.

Below is a partial list of labs that offer chemical residue analysis:

A&L Great Lakes Lab
3505 Conestoga Drive
Fort Wayne, IN 46808
Tel: 219-483-4759
Contact: Tim Grerer; Dan Kite
Minnesota Valley Testing Laboratories
326 Center Street
New Ulm, MN 56073
Tel: 507.354.8517
Samples sent to New Ulm, MN lab
Animal Disease Lab
9732 Shattuc Road
Centralia, IL 62801-5858
Tel: 618.532.6701
Pacific Agricultural Laboratory, LLC
12505 NW Cornell Rd, Ste. 4
Portland, OR 97229
Tel: 503.626.7943
Fax: 503.641.0644
Analytical Laboratory
McCall Hall, PO Box 173620
Montana State University
Bozeman, MT 59717
Tel: 406.994.3383;
Heidi Hickes developed the most
sensitive test available for Oust.
SGS North America
241 34th Ave
Brookings, SD 57006

Tel: 605.692.7611
Columbia Food Laboratories
36740 E. Old Historic Columbia River Hwy
PO Box 40
Corbett, OR 97019
Tel: 503.695.2287
South Dakota Agriculture Laboratories
Brookings Biospace
1006 32nd Ave #103/#105
Brookings, SD 57006-4728
Tel: 605.692.7325
Contact: Dr. Regina Wixon,
Midwest Laboratories
13611 B Street
Omaha, NE 68144
Tel: 402.334.7770
Contact: Lisa Dworak
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