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Systemic Fungicides for Control of Dwarf Bunt of Wheat: I. Seed Treatment. J. A. Hoffmann, Research Plant Pathologist, Agricultural Research Service, U.S. Department of Agriculture, Utah State University, Logan 84322. W. G. Dewey, Professor, Department of Plant Science, and J. E. Call and S. M. Rine, Former Graduate Students, Department of Plant Science, Utah State University, Logan 84322. Plant Dis. 67:294-297. Accepted for publication 1 August 1982. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1983. DOI: 10.1094/PD-67-294.

Twenty-two formulations with known or suspected systemic fungicidal activity were tested as seed treatments for the control of dwarf bunt of wheat (Triticum aestivum) caused by Tilletia controversa during the 5-yr period 19761980. Many of the formulations reduced dwarf bunt incidence, particularly at higher rates of application, but few provided practical control (less than 10% incidence). Several of the formulations reduced stands and seedling vigor. Of the materials tested, thiabendazole (Mertect LSP) exhibited the best control with the least adverse effects. The use of solvent carriers failed to increase the efficacy of the seed treatments.