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Title: FUSARIUM SPECIES CAUSING FUSARIUM YELLOWS OF SUGARBEET.

Author
item Hanson, Linda
item Hill, Amy

Submitted to: Journal of Sugarbeet Research
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/9/2004
Publication Date: 10/1/2004
Citation: Hanson, L.E., Hill, A.L. 2004. Fusarium species causing Fusarium yellows of sugarbeet. Journal of Sugarbeet Research. 41:163-178.

Interpretive Summary: Species of the fungal genus Fusarium from diseased sugar beet were isolated and tested for pathogenicity on sugar beet in the greenhouse in 2001. Most of the pathogenic isolates were identified as Fusarium oxysporum, but four additional species were found that caused yellows symptoms on sugar beet. Of these four, only one had previously been reported to cause yellows symptoms on sugar beet in the United States. The implications of the ability of other species to cause Fusarium yellows of sugar beet is discussed.

Technical Abstract: Species of Fusarium from sugarbeet with Fusarium yellows symptoms were isolated and examined for pathogenicity on sugarbeet in greenhouse tests in 2001. Thirteen pathogenic isolates were obtained, of which the majority (69%) were F. oxysporum. However, four other species were found that caused symptoms on sugarbeet that were indistinguishable from Fusarium yellows caused by F. oxysporum f. sp. betae. These included isolates of F. acuminatum, F. avenaceum, F. solani, and F. moniliforme (=F. verticillioides). Of these, only F. acuminatum had previously been reported to cause yellows symptoms. The presence of additional species in sugarbeets has important implications for disease management.