INCIDENCE OF PRUNUS NECROTIC RINGSPOT VIRUS (PNRV) AND PRUNE DWARF VIRUS (PDV) IN CHERRY ORCHARDS

In the period 1969–1975 investigations were carried out in the Fruit-Growing Research Institute Kyustendil, Bulgaria on the incedence of prunus necrotic ringspot virus and prune dwarf virus on the one orchard collection in the Institute and on two industrial orchards (Sovolyiano and Konyiavo).

The seven year-period of investigation showed higher virus incedence as follows: prunus necrotic ringspot virus from 8.2% to 68.2%, and prune dwarf virus from 2.1% to 35.3%. These data refer to the orchard collection.
These increases of the same viruses in the industrial orchard (Sovolyiano) is from 8.1% to 30.3% for prunus necrotic ringspot virus and from 2.4% to 14.6% for prune dwarf virus, and in Konyiavo it is from 1.8% to 21.4% – prunus necrotic ringspot virus and 0.8% to 17.3% for prune dwarf virus, respectively.

Prunus necrotic ringspot virus spreads more rapidly than prune dwarf virus.

XI International Symposium on Fruit Tree Virus Diseases

T. GERGINOVA

https://doi.org/10.17660/ActaHortic.1981.94.29