Location: Vegetable Research
Title: Evaluation of Regional Sweetpotato Genotypes for Resistance to Soil Insect Pests, 2008 Author
Submitted to: Arthropod Management Tests
Publication Type: Research Notes
Publication Acceptance Date: January 8, 2009
Publication Date: September 15, 2009
Citation: Jackson, D.M. 2009. Evaluation of Regional Sweetpotato Genotypes For Resistance to Soil Insect Pests, 2008. Arthropod Management Tests. Volume 34, Report No. M6, Online Journal at http://www.entsoc.org/pubs/index.html. Technical Abstract: Four insect susceptible cultivars (‘Beauregard’ [B63], 'Beauregard' [B94-14], ‘Liberty’, and 'SC 1149-19'), two insect-resistant cultivars ('Charleston Scarlet' and ‘Ruddy’), and 7 regional genotypes from the 2008 National Sweetpotato Collaborator Trials were evaluated for insect resistance in replicated field trials at Charleston, SC. Four sweetpotato entries had a significantly lower WDS index (Wireworm, Diabrotica, Systena) rating than ‘SC1149 19’, and the highest levels of WDS resistance were for Murasaki-29 (L01-29) and the resistant check cultivars ‘Ruddy’ and ‘Charleston Scarlet’. Nine genotypes had significantly less damage by flea beetles, seven genotypes had significantly less damage by grubs, and six genotypes had significantly less damage by sweetpotato weevils than did ‘SC1149-19’. The ‘Beauregard’ clone B94-14 was inexplicably much more resistant to insects than expected in 2008.