Detection of Blueberry red ringspot virus in different stages of Parthenolecanium corni in Poland. European fruit lecanium scales (Parthenolecanium corni) appeared in a large mass on highbush blueberry plants in central Poland. Some of the highbush blueberry plants growing in the studied plantation were infected by Blueberry red ringspot virus (BRRSV). Since no insect vector of BRRV is known so far, attempts were made to establish whether the soft scale pests were able to uptake the virus with the sap of the infected plants during feeding. The virus was detected and identified using the PCR and the DNA-DNA dot blot hybridisation technique in almost all the tested larval stages (56/60) and adult females (18/20) of P. corni feeding on BRRSV-infected highbush blueberry plants.