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

Published on Mar 1, 2013in Canadian Journal of Plant Science0.986
· DOI :10.4141/cjps2012-223
J. X. Zhang7
Estimated H-index: 7
(AAFC: Agriculture and Agri-Food Canada),
Allen Xue16
Estimated H-index: 16
(AAFC: Agriculture and Agri-Food Canada)
+ 4 AuthorsEd Gregorich6
Estimated H-index: 6
(AAFC: Agriculture and Agri-Food Canada)
Abstract
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 of Fusarium and Rhizoctonia species 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<0.01). The Rs, Fg and Fsp isolates were significantly more abundant in the no-till field than in the t...
  • References (23)
  • Citations (16)
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Fusarium root rot complex is a major soybean disease in Canada and the United States. Since 2006, four Fusarium species, F. oxysporum Schlechtendahl emend. Snyder & Hansen, F. graminearum Schwabe, F. avenaceum (Corda: Fr.) Sacc., and F. tricinctum (Corda) Sacc., have frequently been isolated from soybean roots in eastern Ontario, Canada. The objective of the current study was to screen 57 soybean cultivars that are commercially available in Canada for resistance to these four Fusarium root rot p...
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Fusarium graminearum, the cause of fusarium head blight of small-grain cereals and of gibberella ear rot of corn, has recently been reported to attack soybean, causing root rot and pod blight. A morphologically similar species, Fusarium pseudograminearum, is also an important pathogen of the roots and crown of cereals, but its pathogenicity against soybean has not been tested yet. Pathogenicity tests were conducted under controlled conditions to compare aggressiveness within and between isolates...
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