Submitted to: National Fusarium Head Blight Forum Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 12/9/2002
Publication Date: 12/9/2002
Citation: SCHISLER, D.A., BOEHM, M.J., HICKS, T.E., LIPPS, P.E. USDA-ARS, OHIO STATE UNIVERSITY COOPERATIVE RESEARCH ON BIOLOGICALLY CONTROLLING FUSARIUM HEAD BLIGHT: 2. 2002 FIELD TESTS OF ANTAGONIST AND ANTAGONIST/FUNGICIDE MIXTURES. NATIONAL FUSARIUM HEAD BLIGHT FORUM PROCEEDINGS. p. 119-122.
Technical Abstract: Research on optimizing methods for selectively isolating, mass producing, and utilizing microbial antagonists effective against Fusarium head blight (FHB) on wheat was initiated in 1997 at NCAUR in Peoria, IL, in conjunction with the Ohio State University. Biological control agents discovered in this research hold excellent promise in reducing Fusarium head blight. Field tests were conducted in Peoria, IL, and Wooster, OH, in 2002 to test the hypothesis that combining biocontrol agents with fungicides or resistant wheat cultivars may provide levels of control superior to that obtained when employing these control measures individually. In Peoria, IL, most single and combination treatments reduced FHB symptoms versus at least one control on both susceptible cultivar Pioneer 2545 and moderately resistant cultivar Freedom. A combination of yeast Cryptococcus nodaensis OH 182.9 and fungicide BAS 505 reduced disease severity by 70% compared to the untreated Freedom control. In Wooster, OH, on Pioneer 2545, most treatments reduced disease severity compared to the untreated control with combinations of fungicide tolerant OH 182.9 and either BAS 505 or fungicide Folicur reducing disease severity by approximately 60%. Treatments did not differ when tested on cultivar Freedom. Across both locations, the lowest levels of FHB symptom development were found when two and sometimes three of the available control measures were combined.