DAMAGES CAUSED BY PLUM POX VIRUS TO SOME PLUM CULTIVARS IN THE COLLECTION OF RIMSA TROYAN

The behaviour of several local and introduced plum cultivars to the natural infection of Plum pox virus – PPV has been investigated during a period of 20 years.
The experiment was carried out at the experimental in collection, breeding and experimental orchards of RIMSA Troyan.
Symptoms on the leaves, fruits, bark and wood have been followed throughout the vegetations.
Classification has been accomplished based on cultivars’ resistance to infection and tolerance whereas yield loss in quality and quantity is reported too.
Studied plum cultivars were classified as follows:

• Resistant: ‘Jojo’, does not accept the virus due to strongly expressed supersensitive reaction.
• Cultivars difficult to be infected under the natural environment with insignificant yield losses, like ‘Gabrovska’.
• Cultivars with latent infection of PPV, and no symptoms infestation like ‘Mirabelle de Nancy’.
• Cultivars with high level of tolerance – the least symptoms or fruit damage – lower quality.
• Sensitive cultivars with acceptable yield losses as ‘Valevka’ and some clones of ‘Kyustendilska sinya sliva’. Propagation of these cultivars is justified only in case they have reasonable economic and gustatory qualities.
  They should be planted, however, at a special isolation area and population following the localizing regulation of vectors.
  Free of PPV infection planting material should be used for new plantations.

International Symposium on Plum Pox Virus

K. Dragoyski, B. Stefanova, I. Kamenova

plum, cultivars, PPV infection

https://doi.org/10.17660/ActaHortic.2011.899.7