EFFECT OF SWEETPOTATO GENOTYPE, STORAGE TIME AND PRODUCTION SITE ON FEEDING AND OVIPOSITION BEHAVIOR OF THE SWEETPOTATO WEEVIL, CYLAS FORMICARIUS (COLEOPTERA: APOINIDAE)

Authors

  • Lixin Mao
  • Richard N. Story
  • Abner M. Hammond
  • Don R. Labonte

Abstract

The effect of sweetpotato genotype, storage time and production site on Cylas formicarius (Fab.) feeding and oviposition was investigated. Sweetpotato genotype had a significant effect on feeding and oviposition rates in both no-choice and choice arenas. Beauregard and Centennial were uniformly susceptible across all age groups. W-250 had the least number of feeding punctures and eggs at 7 and 25 days after harvest. At 85 days after harvest, W-244 had the least number of feeding punctures and eggs, while W-250 was not significantly different from Beauregard and Centennial. Roots of the same genotype grown in different locations differed in the number of feeding punctures and eggs. These results suggest that antixenosis is responsible for at least part of the sweetpotato weevil resistance. Storage time and production sites appeared to affect the expression of the resistance, but the outcomes depended on the genotypes.

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Published

2001-06-01

Issue

Vol. 84, No. 2 (June 2001)

Section

Literature Review Articles

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