Surveys were carried out on plum, peach and apricot orchards and varietal collections of stone fruit trees in Albania, for assessing the presence and distribution of virus and virus-like diseases.
During the investigations the most important fruit-growing areas of the country were visited.
Biological assays consisting of mechanical inoculations to herbaceous hosts from glasshouse-forced cuttings and field samples were made in winter and spring respectively.
Graft transmissions to GF 305 were also made in winter and spring 1994. Several samples were checked by electron microscopy, but all were tested by DAS-ELISA for the presence of the following viruses: plum pox potyvirus (PPV), prunus necrotic ringspot (PNRSV), apple mosaic (ApMV), prune dwarf (PDV) ilarviruses, apple chlorotic leaf spot trichovirus (ACLSV), tomato ringspot (TomSV), tomato black ring (TBRV), arabis mosaic (ArMV), raspberry ringspot (RRV), cherry leafroll (CLRV) and strawberry latent ringspot (SLRV) nepoviruses.
A total of 2059 trees were tested: 1142 plum, 710 peach, 207 apricot.
About 47% plum, 43% peach and 12% apricot trees were infected by at least one virus.
The prevailing viruses were PPV (plum 67%), ACLSV (peach 55%), PDV (peach 50%) and PNRSV (apricot 35%). PPV infection was rare in apricot and peach.
No infection by ApMV or any of the nepoviruses was detected.