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Title: Evaluation of Dry-Fleshed Sweetpotato Genotypes For Resistance to Soil Insect Pests, 2009

Author
item Jackson, D

Submitted to: Arthropod Management Tests
Publication Type: Other
Publication Acceptance Date: 8/31/2010
Publication Date: 10/5/2011
Citation: Jackson, D.M. 2011. Evaluation of Dry-Fleshed Sweetpotato Genotypes For Resistance to Soil Insect Pests, 2009. Arthropod Management Tests. 36:M4.

Interpretive Summary:

Technical Abstract: Two insect-susceptible, orange-fleshed check cultivars (‘Beauregard’ and ‘SC1149 19’), two insect-resistant check cultivars (‘Ruddy’ and ‘Sumor’), 31 dry-flesh genotypes from the USVL sweetpotato breeding program, and 3 other varieties were evaluated for insect resistance in replicated field trials at Charleston, SC. Thirty-five genotypes had a significantly higher percentage of uninjured roots than the two susceptible check cultivars. All 36 other genotypes had a significantly lower WDS (Wireworm:Diabrotica:Systena) rating than the susceptible checks. All but one sweetpotato genotype had a significantly lower percentage of infestation by flea beetles than did ‘SC1149-19’, and 14 genotypes had a significantly lower percentage of infestation by flea beetles than did ‘Beauregard’. Twenty-two genotypes had significantly lower infestation by white grub larvae than did the two susceptible check cultivars. All but one genotype had a significantly lower percentage of infestation by sweetpotato weevils than did the check cultivars.