Chemical Injury
Sample Submission
Chemical injury is identified by only visual observation of the plant sample. If herbicide residual tests are required, South Dakota State University and Montana State University provide this type of service.
- Send several whole plants (when possible), roots and all that represent all stages of the symptoms being expressed.
- Include “normal” plants from the area near the symptomatic plants for comparison.
- Enclose the root ball in a plastic bag to keep the soil from touching the leaves.
- Place entire plant sample in a plastic bag to reduce drying.
- Providing the following information allows more accurate diagnosis
- Chemical History
- Current and previous year
- Rates
- Application timing (date and plant growth stage)
- Weather conditions during application (temperature, wind speed, etc)
- Possibility of drift from another pesticide application
- Planting date
- Crop growth stage
- Symptom description
- How many plants in the area are affected
- What is the symptom distribution (low lying areas, field entrance, strips, etc)
- Site history
- Fill out “Submission Form” and include it with the sample
- Keep sample cool until shipment
Send Samples To:
Plant and Pest Diagnostic Clinic
448 Plant Science Hall
Lincoln, NE 68583-0722
Plant & Pest
