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United States Department of Agriculture

Agricultural Research Service

Research Project: Cool Season Grain Legume Genetic Enhancement and Pathology Title: Rhizoctonia root rot of lentil caused by Rhizoctonia solani AG 2-1

Authors
item Paulitz, Timothy
item Schroeder, Kurt -
item Chen, Weidong

Submitted to: Pisum Genetics
Publication Type: Abstract Only
Publication Acceptance Date: April 5, 2012
Publication Date: N/A

Technical Abstract: Lentil root rot symptoms were observed in commercial fields in the US Pacific Northwest during the unusually cool and moist spring weather of 2010. Symptoms included sunken lesions on root and stem with brown discoloration, resembling diseases caused by Rhizoctonia solani. Rhizoctonia solani was isolated from diseased plants and from surrounding soils and was identified to be AG 2-1 based on ITS sequences. Pathogenicity tests were conducted at 16C 12 h day and 10 C night temperature conditions using three isolates of R. solani AG 2-1 from lentil. Isolates were severely pathogenic to lentil cvs. Pardina and Merrit, as well as to spring canola cv Sunrise, and the pathogen was reisolated from the inoculated plants. Rhizoctonia solani AG 2-1 is known to be a pathogen of canola in Australia, Canada and US Pacific Northwest, but has not been previously isolated from lentil. This is the first report of Rhizoctonia solani AG 2-1 infecting lentil.

Last Modified: 10/31/2014
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