Effect of Periodical Cicada Injury and Degree of Fire Blight Severity on Asian Pear Cultivars
DOI:
https://doi.org/10.71318/apom.1997.51.1.35Abstract
Sixteen Asian pear cultivars grown at Virginia Gold Orchard near Natural Bridge, VA were evaluated for shoot damage from the seventeen-year cicada ( Magicicada septemdecimL.), followed by fire blight infection by the bacterium Erwinia amylovora[(Burr.) Winsl. et al.]. The Japanese pear cultivars, ‘Yoi nashi’ and ‘Ichiban nashi’, proved to be the most susceptible; whereas two Korean types, ‘Ar-rirang 1’ and ‘Korean Giant,’ were most resistant. Two Japanese cultivars, ‘Shinko’ and ‘Singo,’ proved to have intermediate resistance. All cultivars exhibited some degree of cicada damage and 68% showed a strong correlation between cicada injury and fire blight severity. Those with the softest woody branches were attacked and injured most severely.
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