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How To Submit Samples For Disease Diagnosis
1. Collect living plants that exhibit varying stages of decline. Do NOT submit dead plants.
2. For herbaceous plants, collect the entire plant, including as much of the root system as possible. Dig out (don't pull) several symptomatic plants and shake excess soil from the roots. Bundle plants together and wrap roots only in a plastic bag. Do not wrap stems in plastic. Wrap the entire bundle of plants in newspaper and place it in a cardboard box.
3. For tree wilts, collect branches with a 1/2-inch to 1-inch diameter. Collect sample from branches, which are actively wilting, but not totally dead. Wrap in plastic to retain moisture. Keep cool until submitted.
4. For virus testing, collect symptomatic leaves, stems, or entire plants. Wrap in plastic. It is very important that these samples do not dry out during shipment. Do not add extra water to the bags.
5. For nematode analysis, ship soil in plastic bags and keep refrigerated until shipped. It is important that nematode samples are not exposed to high temperature. Specific guidelines for sample collection are available on request.
6. Submit a completed Sample Submission Form with each sample. Please include a phone number and/or email address.
7. Ship samples immediately after collection.
8. Ship samples by overnight delivery or mail early in the week to ensure fast delivery. Plant samples often decompose if left in the post office over the weekend.
9. Please submit payment with each sample. Make checks payable to the University of Minnesota.
10.
Ship to:
Plant Disease Clinic
495 Borlaug Hall
1991 Upper Buford Circle
University of Minnesota
St. Paul, MN 55108
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