The organization of the virus-tested planting material production for the grape varieties of the local and foreign selection in KazakhstanSaule Kazybayeva, Svetlana Dolgikh, Shokan Kulshanov, Marina Urazayeva and Gulnaz UshkempirovaBIO Web Conf., 25 (2020) 01002DOI: https://doi.org/10.1051/bioconf/20202501002