1. Dep. of Agronomy
2. Dep. of Plant and Soil Sci.Clemson Univ.ClemsonSC29631
3. Dep. of Plant PathologyUniv. of GeorgiaAthensGA30602
4. USDA‐ARSAppalachian Soil and Water Conserv. LabBeckleyWV25802
5. Veterinary Med. Diagnosis LabUniv. of MissouriColumbiaMO65211