General areas of expertise:
Disease of sugar beet, mycology, biological control
Overview of current program:
The focus of my program is on soil-borne diseases of sugar beet and crops grown in rotation with sugar beet. The overall aim is to improve understanding of the pathogens affecting sugar beet, their interaction with the host and alternative hosts, and management alternatives to minimize their impact in crop production. Our current focus is on: 1. diseases caused by Fusarium species, including wilt or yellows, root rot, and seed stalk blight; 2. Rhizoctonia crown and root rot; 3. seedling diseases in sugar beet; and 4. Cercospora leaf spot. The research unit maintains Cercospora leaf spot and Rhizoctonia seedling disease nurseries to screen for disease resistance. Current projects include the investigation of diversity in Fusarium pathogenic on sugar beet, development of improved diagnostic methods for sugar beet pathogens and fungicide sensitivity, and developing improved screening methods for plant disease responses.
Recent publications:
Hanson, L.E. and R.T. Lewellen. 2007. Fusarium stalk rot of sugar beet caused by Fusarium solani from the Pacific Coast. Plant Disease 91:1204.
Panella, L. and L.E. Hanson. 2007. Registration of FC723 and FC723CMS monogerm sugarbeet germplasm resistant to Rhizoctonia root rot and moderately resistant to Cercospora leaf spot. Journal of Plant Registrations 1:66-67.
Hanson, L.E. and L. Panella. 2007. Rhizoctonia root rot resistance of Beta PIs from the USDA-ARS, NPGS, 2006. Plant Disease Management Reports (online). 1:V023. DOI:10,1094/PDMR01. The American Phytopathological Society, St. Paul, MN.
Hanson, L.E. 2006. First report of Fusarium yellows of sugar beet caused by Fusarium oxysporum in Michigan. Plant Disease 90:1554.
Larson, R.L., A.L. Hill, A. Fenwick, A.R. Kniss, L.E. Hanson, and S.D. Miller. 2006. Influence of glyphosate on Rhizoctonia and Fusarium root rot in sugar beet. Pest Mangement Science 62: 1182-1192.
Hanson, L.E. 2006. Fusarium yellowing of sugar beet caused by Fusarium graminearum from Minnesota and Wyoming. Plant Disease 90:686.
Hanson, L.E. and B.J. Jacobsen. 2006. Beet root-rot inducing isolates of Fusarium oxysporum from Colorado and Montana. Plant Disease 90:247.
Panella L. and L.E. Hanson. 2006. Registration of FC720, FC722, FC722CMS monogerm sugarbeet germplasms resistant to Rhizoctonia root rot and moderately resistant to Cercospora leaf spot. Crop Science 46:1009-1010.
Davidson*, R.M., L.E. Hanson, G.D. Franc, and L. Panella. 2006. Analysis of beta-tubulin gene sequences from benzimidazole-sensitive and –tolerant Cercospora beticola. Journal of Phytopathology, 154:321-328.
Asher, M.J.C. and L.E. Hanson. 2006. Fungal and Bacterial Diseases. pp. 286-315. In Sugar Beet. A.P. Draycott, ed. Blackwell Publishing Ltd. Ames, Iowa.
Hanson, L.E. and L. Panella. 2006. Rhizoctonia root-rot resistance of Beta PIs from the USDA-ARS NPGS, 2005. Biological and Cultural Tests for Control of Plant Diseases (online). 21:FC011. DOI:10.1094/BC21. The American Phytopathological Society, St. Paul, MN.
Panella, L. and L.E. Hanson. 2006. USDA-ARS sugar beet germplasm developed in Fort Collins, CO, evaluated for Rhizoctonia resistance, 2005. Biological and Cultural Tests for Control of Plant Diseases (online). 21:FC012. DOI:10.1094/BC21. The American Phytopathological Society, St. Paul, MN.