Summary
Valsa canker is the most serious wood rot disease of apple in Japan. Dormant, excised twig assay in vitro was used to determine resistance to Valsa canker. ‘Fuji’,’ starking Delicious’, ‘M.26 EMLA’, and ‘MM. 106’ were considered to be highly susceptible, while Malus sieboldii showed moderate resistance. Several cultivars belonging to M. prunifolia, M. baccata, and M. × domestica showed comparative resistance. The phloridzin content in the bark of Malus species was studied in relation to Valsa canker resistance. Phloridzin content of M. sieboldii was lower than in M. × domestica. Comparatively resistant cultivars had similar or higher phloridzin content compared to susceptible cultivars. No clear correlations were found between resistance and phloridzin contents in the bark of Malus species.
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© 1994 Springer Science+Business Media Dordrecht
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Bessho, H., Soejima, J., Tsuchiya, S. (1994). Screening methods of apple trees for resistance to Valsa canker. In: Schmidt, H., Kellerhals, M. (eds) Progress in Temperate Fruit Breeding. Developments in Plant Breeding, vol 1. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0467-8_10
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DOI: https://doi.org/10.1007/978-94-011-0467-8_10
Publisher Name: Springer, Dordrecht
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