Author
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Myers, Clayton |
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Submitted to: Annual Cumberland Shenandoah Fruit Workers Conference
Publication Type: Abstract Only Publication Acceptance Date: 1/4/2008 Publication Date: 9/10/2008 Citation: Myers, C.T. 2008. Codling moth resistance and associated pytochemical variation in fruit of Malus tschonoskii. Annual Cumberland Shenandoah Fruit Workers Conference. Interpretive Summary: Technical Abstract: Work is ongoing to evaluate the potential for host plant resistance to codling moth and other apple pests among the diverse Malus germplasm housed at the USDA Plant Genetic Resources Unit (PRGU) in Geneva, NY. Significant resistance to larval feeding from codling moth has been observed in fruit from the Japanese pillar crab apple, Malus tschonoskii. This resistance has been confirmed by laboratory assays and appears to be present in fruit throughout the growing season. Studies were conducted to assess patterns of larval behavior, including larval entry time, feeding depth, and survival fate. Extractions of total phenolics were also conducted on fruit of M. tschonoskii as well as a number of other semi-resistant accessions and susceptible accessions such as 'Gala' and 'Golden Delicious.' Total phenolics varied significantly by accession and may be correlated with patterns of observed pest resistance. Additional characterization of specific phenolic compounds may help to clarify the underlying chemical mechanisms of resistance. |
