Bioinformatics-assisted characterization of the ITS1-5 8S-ITS2 segments of nuclear rRNA gene clusters, and its explotation in molecular diagnostics of European crop-parasitic nematodes of the genus Ditylenchus= : Bioinformatics-assisted characterization of the ITS1-5 8S-ITS2 segments of nuclear rRNA gene clusters, and its explototation in molecular diagnostics of European crop-parasitic nematodes of the genus Ditylenchus - Marek, M.