Control of Stem Rust on Spring Wheat by Triadimefon and Fenapanil. J. B. Rowell, Research Plant Pathologist, Cereal Rust Laboratory, AR, SEA, USDA, University of Minnesota, St. Paul 55108. Plant Dis. 65:235-236. . 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, 1981. DOI: 10.1094/PD-65-235.

Two systemic fungicides, triadimefon and fenapanil, appear promising for control of stem rust epidemics on spring wheat in the north central United States. One spray of these fungicides, suitably timed to host and rust development, gave satisfactory control in moderate rust epidemics. Good control was obtained in most schedules of two sprays applied at a 7–20 day interval during the period from primary infection to early logarithmic increase of rust. Triadimefon was generally more effective than fenapanil at 280 g (a.i.)/ha.