Vol. 10 No. 3 (2004)
Articles

Susceptibility of some traditional pear cultivars of Hungarian and foreign origin to the pathogenic bacterium Erwinia amylovora

Published August 13, 2004
K. Honty
BUESPA, Faculty of Horticultural Science, 1 Department of Fruit Science, H-I 118 Villányi út 31, Budapest, Hungary
M. Hevesi
BUESPA, Faculty of Horticultural Science, 1 Department of Fruit Science, H-I 118 Villányi út 31, Budapest, Hungary
M. Göndör
BUESPA, Faculty of Horticultural Science, 1 Department of Fruit Science, H-I 118 Villányi út 31, Budapest, Hungary
G. Tóth M.
BUESPA, Faculty of Horticultural Science, 1 Department of Fruit Science, H-I 118 Villányi út 31, Budapest, Hungary
V. Bács-Várkuti
BUESPA, Faculty of Horticultural Science, 1 Department of Fruit Science, H-I 118 Villányi út 31, Budapest, Hungary
A. Ferenczy
BUESPA, Faculty of Horticultural Science, Department of Mathematics and Informatics, H-I 118 Villányi út 31, Budapest, Hungary
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APA

Honty, K., Hevesi, M., Göndör, M., M., G. T., Bács-Várkuti, V., & Ferenczy, A. (2004). Susceptibility of some traditional pear cultivars of Hungarian and foreign origin to the pathogenic bacterium Erwinia amylovora. International Journal of Horticultural Science, 10(3), 41-45. https://doi.org/10.31421/IJHS/10/3/506

Fire blight, a disease caused by the bacterium Erwinia amylovora (Burrill) Winslow et al., has been causing serious damage in Hungarian pear plantations since 1996. A prospective control measure could be the use of resistant cultivars. For that purpose ten pear cultivars have been tested under laboratory and greenhouse conditions for resistance to Erwinia amylovora strains collected in Hungary. Six of these cultivars are Hungarian ones of unknown origin, while four are traditional old varieties. Resistant cultivars should serve as germplasm for future breeding. Inoculations were made with a mixture of different pear isolates of the bacteria collected from various growing regions of Hungary (Ea 21, 23), at a density of 5x108 cells/ml. Susceptibility/resistance has been assessed on the basis of intensity of blight symptoms observed on shoots, flower parts and fruits. Cultivars were assigned to three susceptibility groups (low, moderate and high). Complete resistance was not found among the cultivars tested. The highest level of resistance was found in cultivar 'Kieffer', while the other cultivars displayed either moderate or high susceptibility to infection.

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