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Sensitivity of selected cultivars of apple trees to Nectria galligena Bres. infection

Marek Grabowski

Department of Plant Protection
Faculty of Horticulture, Agricultural University
29 Listopada 54, 31-425 Kraków, Poland

Experiments were conducted to determine the degree of sensitivity of twelve apple tree cultivars to fruit tree disease (Nectria galligena Bres.). The trees were infected by means of injury to the branches, the degree of infestation being ascertained on the basis of measurement of the magnitude of disease formation as well as the degree of ringing on the branches. The results of these observations, conducted from 1985 to 1988, showed a significant difference in fruit tree canker susceptibility among the cultivars tested. Those showing high sensitivity were Oliwka Żółta (Yellow Transparent) and Cox's Orange Pippin; moderately sensitivity Idared, Spartan, Jerseymac, McIntosh, Jonagold, Close, and Vista Bella, while low susceptibility was shown by the cultivars Golden Delicious, Jonathan, and Cortland.

Grabowski M., 1991. Sensitivity of selected cultivars of apple trees to Nectria galligena Bres. infection. Folia Horticulturae III/1: 79-87.