Prevalence, pathogenicity and cultivar resistance of Fusarium and Rhizoctonia species causing soybean root rot

• Published in: Canadian journal of plant science 2013, Vol.93 (2), p.221-236
• Main Authors: Zhang, J. X, Xue, A. G, Cober, E. R, Morrison, M. J, Zhang, H. J, Zhang, S. Z, Gregorich, E
• Format: Article
• Language: English
• Subjects: Cultivar resistance; cultivars; espèces de Fusarium; Fusarium; Fusarium species; greenhouses; iron; mature plants; no-tillage; pathogenicity; pathogénicité; piétin du soja; PLANT PATHOLOGY; Rhizoctonia; Rhizoctonia solani; rhizosphere; root rot; roots; Résistance des cultivars; seedling emergence; seedlings; soybean root rot; soybeans; tillage; travail du sol
• ISSN: 0008-4220; 1918-1833; 1918-1833
• DOI: 10.1139/CJPS2012-223

Zhang, J. X., Xue, A. G., Cober, E. R., Morrison, M. J., Zhang, H. J., Zhang, S. Z. and Gregorich, E. 2013. Prevalence, pathogenicity and cultivar resistance ofFusariumandRhizoctoniaspecies causing soybean root rot. Can. J. Plant Sci. 93: 221-236. Root rot complex, caused by Fusarium and Rhizoctonia species, is a major soybean disease in Canada. We isolated nine Fusarium and Rhizoctonia species including F. oxysporum (Fo), F. graminearum (Fg), F. solani (Fs), F. avenaceum (Fa), F. tricinctum (Ft), F. sporotrichioides (Fsp), F. equiseti (Fe), F. poae (Fp), and R. solani (Rs) from soybean roots in eastern Ontario, Canada. The isolation results indicated that Fo was the most prevalent species while Fa, Fsp, and Fp were the least frequent species in the soybean rhizosphere. Numbers of Fo, Fs, Fg, and Rs isolates recovered from adult plant roots were significantly greater than those from seedling roots (P