Location: Vegetable Research
Title: Evaluation of Regional Sweetpotato Genotypes for Resistance to Soil Insect Pests, 2011 Author
Submitted to: Arthropod Management Tests
Publication Type: Other
Publication Acceptance Date: November 2, 2012
Publication Date: December 5, 2012
Citation: Jackson, D.M. 2012. Evaluation of Regional Sweetpotato Genotypes for Resistance to Soil Insect Pests, 2011. Arthropod Management Tests. Volume 37, Report No. M6, Online Journal at http://www.entsoc.org/pubs/index.html. Technical Abstract: Three insect susceptible sweetpotato cultivars (‘Beauregard’ [B63 & B94-14] and 'SC1149 19'), two insect-resistant sweetpotato cultivars ('Charleston Scarlet' and ‘Ruddy’), and ten regional sweetpotato genotypes from the 2011 National Sweetpotato Collaborator Trials were evaluated for insect resistance in replicated field trials at Charleston, SC. Three entries (‘Ruddy, ‘Charleston Scarlet’, and L07-146) had significantly less overall insect damage (ie., higher percentage of undamaged roots) and a lower WDS index (Wireworm, Diabrotica, Systena) than did the three susceptible checks (B-63, B94-14, and SC1149-19). Overall, the highest level of resistance was for the resistant check cultivar ‘Ruddy’, which had nearly 90% uninjured roots. Twelve genotypes had significantly less damage by flea beetles than did ‘SC1149 19’. Root injury from sweetpotato weevils was very light and data were not significant for 2011.