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United States Department of Agriculture

Agricultural Research Service

Research Project: Genetic Dissection of Traits for Sugar Beet Improvement

Location: Sugarbeet and Bean Research

Title: Project 722: Seedling diseases of sugar beet – diversity and host interactions

Authors
item McGrath, J Mitchell
item Hanson, Linda
item Goodwill, Thomas

Submitted to: Annual Beet Sugar Development Foundation Research Report
Publication Type: Research Notes
Publication Acceptance Date: May 1, 2014
Publication Date: June 1, 2014
Citation: McGrath, J.M., Hanson, L.E., Goodwill, T.R. 2014. Project 722: Seedling diseases of sugar beet – diversity and host interactions. [CD-ROM]. 2013 Annual Beet Sugar Development Foundation Research Report. Denver, Colorado: Beet Sugar Development Foundation.

Technical Abstract: In five years of testing, Rhizoctonia solani and Fusarium spp. were commonly isolated from infected field-isolated diseased sugar beet seedlings. Which fungus is more commonly isolated from seedlings has varied over the seasons. For example, R. solani was the most frequently isolated pathogen in 2010, and Fusarium spp. was isolated from the most fields in 2011 and again in 2013 (100% of fields sampled). The two pathogens were often isolated from the same field, and even from the same beet. In 2013, there was a wet spring and Aphanomyces and Pythium were isolated from approximately 60% of samples collected. Fusarium spp., R. solani, and Aphanomyces all were isolated as the sole organism cultured from at least one plated beet plant while Pythium was isolated only from beets with one or more other potential pathogens. Phoma was isolated from single seedlings from two different fields.

Last Modified: 11/27/2014
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