RATE OF PPV INFECTION OF SOME PLUM CULTIVARS DEPENDING ON ROOTSTOCK AND MANAGEMENT SYSTEMS

On a plum experimental plantation established in 1980 with cultivars ‘Stanley’, ‘Gabrovska’ and ‘Kyustendilska sinya’ grafted on bullage plum (Prunus insititia L.) ‘Byala Uhrepka’ variety rootstock, and located in a severely infected area, the different rate of PPV infection was monitored and registered.
The nature of infection was first proved in 1994 using ELISA and later on through additional tests in 1997 and 2000.
Disease symptoms were first encountered in ‘Kyustendilska sinya’ on the first year, in ‘Stanley’ on the fourth year and in root suckers of ‘Gabrovska’ on the fifth year.
Until the twelfth year of orchard management nearly all the trees of ‘Kyustendilska sinya’ were infected, compared to 23% of ‘Stanley’ trees and just 1% in ‘Gabrovska’.
The outstandingly low infection rate of infection in ‘Gabrovska’ was attributed to the ‘Byala Uhrepka’ rootstock.
This conclusion was drawn due to the fact that in another experimental orchard located in the same area 50% of the trees of this variety, however, grafted on myrobalan rootstock, were infected by the seventh year of planting.
No significant differences were found in the rate of PPV infection between the trees of ‘Kyustendilska sinya’ and ‘Stanley’.

VII International Symposium on Plum and Prune Genetics, Breeding and Pomology

K. Dragoiski, H. Dinkova, I. Minev

plum, PPV, cultivars, rootstocks

https://doi.org/10.17660/ActaHortic.2002.577.45