Herbaceous Plants: Send whole plants, when possible, including roots and soil. Roots and soil should be in a plastic bag tied off at the soil line to prevent soil from touching foliage.
Vascular Wilt Diseases including Verticillium Wilt, Dutch Elm Disease, Oak Wilt.Select branches that are partially wilted, with symptomatic leaves progressing from the tip of branches inward to thte trunk. Be sure that branches are not totally wilted, dry or dead.
- Select samples from up to three symptomatic branches per single tree. Branch samples should be at least 1 inch in diameter, cut into 6- to 8- inch lengths, and placed in large resealable plastic bags. DO NOT include wet paper towel with sample.
- Keep samples cool during sampling, shipping and storage, but do not freeze.
- Ship samples overnight mail (no later than Thursday) or deliver in person to the laboratory.
Seedlings: Leave plants in plug sheets or trays if possible. Send a minimum of 12 seedlings per sample.
Turf: Include a square of turf from the margin of the diseased area so that both healthy and diseased turf is included. An intact layer of soil should remain on the root system. Wrap samples in newspaper and pack in a box for shipment. Do not add moisture to the turf prior to shipment. Provide a detailed description of cultural practices (irrigation, fertilization, pesticide application, etc.) with the sample.
*Note: Diagnostic Services does not perform health analysis of golf course turf. Contact Dr. Joe Vargas, MSU Plant Pathology, at 517-353-9082. Golf Turf Diagnostic Submittal Form.
Leaf spot and Fruit rot: Send several affected samples representing the early and moderate stages of symptom progression.
Shipping out of state sample
If sending samples from outside of Michigan infected plant material MUST be double sealed in plastic bags (eg. two zip-loc freezer bags). Place the sealed bags in a sturdy shipping container.