Time: 1 - 3 weeks after black layers have formed on 80% of the kernels of most ears.

Where: 8 inch segment of stalk found between 6 and 14 inches above the soil. Void damaged stalks and remove sheaths. Amount: Within an area not larger than 10 acres, fifteen 8 inch segments should be collected at random to form one composite sample to be evaluated. Areas of differing soil types or management should be sampled separately.

Shipping: Place in a paper bag (not plastic). Refrigerate if delay in shipping is one or more days. Do not freeze.