INVESTIGATIONS ON THE RESISTANCE TO PLUM POX VIRUS DISEASE OF THE APRICOT VARIETY “CEGLÉDI BIBORKAJSZI C 244”

It is well-known that the majority of commercial apricot varieties of Central-Europe are highly susceptible to plum pox virus (PPV). In the course of the Hungarian selection and research for regional varieties turned in the 1950s to the "Ceglédi biborkajszi C 244" and was registered in 1977. In the past 15 years a great number of orchards have been planted with this variety.
According to earlier observations the variety showed no symptoms even in PPV infected regions.
Similarly, no virus symptom appeared on the progenies of the variety during cross-breeding.

For testing the possible resistance to PPV of the variety artificial inoculation experiments were set up.
The chip budding is an efficient inoculation method.
Avidin-biotin ELISA tests are also necessary to determine the possible immunity, tolerance or resistance to PPV of varieties under evaluation.
The inoculation experiments showed that the "Ceglédi biborkajszi" is not immune to PPV, but appears to be less frequently infected naturally than some known susceptible apricot varieties.
The proper evaluation could be achieved only by natural and artificial inoculations.
It is also extremely important to remove suckers from myrobalan and plum rootstocks as one of the control measures for plum pox disease in apricot orchards.

VIII International Symposium on Apricot Culture and Decline

F. Nyujtó, M. Németh, M. Kölber

https://doi.org/10.17660/ActaHortic.1986.192.26