Submitted to: Arthropod Management Tests
Publication Type: Research Notes
Publication Acceptance Date: January 26, 2006
Publication Date: November 15, 2006
Citation: Jackson, D.M., Bohac, J. 2006. Evaluation of Advanced Sweetpotato Genotypes for Resistance to Soil Insect Pests, 2003. Arthropod Management Tests, Volume 31, Report No M2, Online Journal at http://www.entsoc.org/pubs/index.html. Interpretive Summary: Most commercial sweetpotato cultivars have little resistance to soil insect pests, which can severely limit marketable yields. Thus, there is a need to develop new cutlivars that have increased levels of insect resistance. This report describes a field evaluation of 20 advanced sweetpotato entries from the USDA ARS program at the U. S. Vegetable Laboratory (USVL), Charleston, SC, 2002. Several of the advanced lines were more resistant to soil insect pests than were the susceptible check cultivars. The most promising of these advanced clones will be developed as breeding lines or new sweetpotato cultivars.
Technical Abstract: This report describes a field evaluation of 20 advanced sweetpotato genotypes from the USDA ARS program at the U. S. Vegetable Laboratory (USVL), Charleston, SC, 2003. There were highly significant genotype effects for percentage of clean roots and percentage of roots damaged by SPW, but data were not significant for WDS index, percentage of roots damaged by SPFB, or percentage of roots damaged by white grubs. Fifteen genotypes had a significantly higher percentage of undamaged roots than ‘SC 1149 19’, and nine genotypes had a significantly higher percentage of undamaged roots than ‘Beauregard’. Fifteen genotypes had significantly less SPW damage than ‘SC 1149 19’ or ‘Beauregard’.