Yield Responses of Direct-Seeded Wheat to Rhizobacteria and Fungicide Seed Treatments

Plant Disease
R James CookHao Zhang

Abstract

Field trials were conducted with winter and spring wheat in eastern Washington and northern Idaho over several years to determine the benefit, as measured by grain yield, of seed treatments with rhizobacteria and formulated fungicides in cropping systems favorable to root diseases. The trials were conducted with wheat direct-seeded (no-till) in fields with a history of intensive cereals and one or more of the root diseases: take-all caused by Gaeumannomyces graminis var. tritici, Rhizoctonia root rot caused by Rhizoctonia solani AG8 and R. oryzae, and Pythium root rot caused mainly by Pythium irregulare and P. ultimum. The seed treatments included Bacillus sp. L324-92, Pseudomonas fluorescens Q69c-80, Pseudomonas fluorescens Q8r1-96, difenoconazole + metalaxyl (Dividend + Apron), difenoconazole + mefenoxam (Dividend + Apron XL = Dividend XL), tebuconazole + metalaxyl (Raxil XT), and tebuconazole + thiram (Raxil-thiram). Controls were nontreated seed planted into both nontreated (natural) soil and soil fumigated with methyl bromide just prior to planting. Although the data indicate a trend in higher wheat yields with two rhizobacteria treatments over the nontreated control (171 and 264 kg/ha, respectively), these higher yields w...Continue Reading

Citations

Oct 26, 2010·Journal of Bacteriology·Dmitri V MavrodiLinda S Thomashow
Nov 30, 2006·Proceedings of the National Academy of Sciences of the United States of America·R James Cook
Oct 24, 2008·Phytopathology·Brian B McSpadden Gardener
Mar 1, 2006·Plant Disease·W F Schillinger, T C Paulitz
Oct 24, 2008·Phytopathology·Brian B McSpadden Gardener
Apr 30, 2009·Annual Review of Phytopathology·Gary P Munkvold
Mar 16, 2007·Annual Review of Phytopathology·R James Cook

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