Prevalence of Take-all Caused by Gaeumannomyces graminis var. tritici on Wheat in Georgia. C. S. Rothrock, Department of Plant Pathology, University of Georgia Experiment Station, Experiment 30212. B. M. Cunfer, Department of Plant Pathology, University of Georgia Experiment Station, Experiment 30212. Plant Disease 68:351, 1984. Accepted for publication 23 January 1984. Copyright 1984 The American Phytopathological Society. DOI: 10.1094/PD-68-351h.
Take-all of wheat (Triticum aestivum L. em. Thell.) caused by Gaeumannomyces graminis/ (Sacc.) von Arx & Olivier var. tritici Walker (Ggt) was first reported in Georgia in 1952. With recent expansion in wheat acreage, occurrence of take-all has increased. We surveyed 10 randomly selected fields in each of four areas of the state in 1983 and found symptoms and signs of take-all in seven fields; Ggt was confirmed by induction of fertile perithecia. Ggt was found in soil samples from six fields by bioassay, including one field without symptoms. Fields in which take-all was detected were under either conservation or conventional tillage. All fields with take-all had been double-cropped with soybeans, a finding supporting previous reports that soybeans are a possible host of Ggt or counteract take-all decline.