sodininkystė ir daržininkystė 31(3–4)

11. Mathioudakis M. M., Maliogka V. I., Katsiani A. T., Katis N. I. 2010. Incidenceand molecular viability of Apple stem pitting and Apple chlorotic leaf spot virusesin Apple and pear orchards in Greece. Journal of Plant Pathology, 92(1):139–147.12. Maxim A., Zagrai L., Zagrai I., Isac M. 2004. Studies on the influence of Applestem grooving virus on tree growth of various Apple cultivars in the nursery.Acta Horticulturae, 657: 41–44.13. Nemeth M. 1986. Virus. Mycoplazma, and Ricketsia Diseases of Fruit Trees.Academia Kiado, Budapest.14. Park W. M., Ryu K. H., Choi J. K. 1990. Serological diagnosis of cucumbermosaic virus. Korean J. Plant Pathol, 6: 402–408.15. Pūpola N., Moročko-Bičevska I., Kāle A., Zeltiaš A. 2011. Occurrence andDiversity of Pome Fruit Viruses in Apple and Pear Orchards in Latvia. Journalof Phytopathology, 159(9): 597–605.16. Spak J., Kubelkova D. 2000. Epidemiology of raspberry bushy dwarf virus inthe Czech Republic. J Phytopath, 148(6): 371–377.17. Šutič D. D., Ford R. E., Tošič M. T. 1999. Virus Diseases of Fruit Trees. VirusDiseases of Small Fruits. In: D. D. Šutič, R. E. Ford, M. T. Tošič. Handbook ofPlant Virus Diseases. CRC Press, Boca Raton, FL., 321–467.18. Tarakanovas P. 1999. Statistinių duomenų apdorojimo programos paketas„Selekcija“. Akademija.19. van den Berg A. 2003. Certificied Nursery Tree Production in Holland. TheCompact Fruit Tree, 36: 43–45.20. Wu Z. B., Ku H. M., Su C. C., Chen I. Z., Jan F. J. 2010. Molecular and biologicalcharacterization of an isolate of Apple stem pitting virus causing pear veinyellows disease in Taiwan. Journal of Plant Pathology, 92(3): 721–728.21. Zawadzka B. 1989. The influence of virus and mycoplasma diseases on frostdamage of Apple trees. Acta Horticulturae, 235: 59–67.SODININKYSTĖ IR DARŽININKYSTĖ. SCIENTIFIC ARTICLES. 2012. 31(3–4).Virologic status of the apple trees at the Institute of HorticultureI. Mažeikienė, D. Mozerytė, D. Maliauskaitė, J. B. ŠikšnianienėSummaryMonitoring, isolation, propagation and retesting of apple nuclear stock material for initialvirology condition was made at the Institute of Horticulture, Lithuanian Research Centre forAgriculture and Forestry, Plant Propagation Centre during several years. There are no effectiveprotective measures against viral diseases, therefore it is very important to use virus-free plantingmaterial in establishing orchards, to maintain a high level of economic productivity of appletrees. The nuclear stock material of apple trees at the Institute of Horticulture was virus testedby the PCR method, and it was found that the planting material complies with the requirementsof it healthy. Prebasic material of apple in nursery orchard, not found viral infections as well.12