EPIDEMIOLOGY OF SHARKA DISEASE IN UKRAINE

I. Budzanivska, L. Usko, A. Gospodaryk, M. Melnyk, V. Polischuk
Sharka disease of stone fruits caused by Plum pox virus (PPV) was first described in Ukraine in 1966 and since then it has been spreading all over the country. PPV was shown to be most spread in the Transcarpathian region in the west of Ukraine.
Screening of stone fruit cultures for PPV was carried in out 7 regions of Ukraine. ELISA testing demonstrated that plum trees (Prunus domestica) were most infected, whereas peach trees (P. Persicae) were less infected representatives of the Prunus genus in this region. The submountain district of the Transcarpathian region was characterized with the highest percentage of PPV-infected trees. Significant spread of the disease shown for plantings in the Transcarpathian region is due to the cultivation of PPV-susceptible plum cultivars: ‘Ugorka zvychayna’, ‘Ugorka italiyska’ and ‘Ugorka moldavska’.
Comparison of different agroclimatic zones for PPV spread on stone fruit cultures showed that sharka disease is most significantly spread and pronounced in the the submountain agroclimatic zone. This is obviously because the climate of this zone does not favour cultivation of other more thermophyte stone fruit cultures, like apricot and peach which are less susceptible to this virus. In addition, the majority of plum cultivars grown in the submountain agroclimatic zone are particularly susceptible to PPV.
ELISA testing of various plant parts (generative and vegetative buds, flowers, young and mature fruits, bark) proved virus presence in all organs studied, however significant dependence of virus load and localization on time of the year has been shown. Maximum content of Plum pox virus was noted for flowers, young leaves and mature fruits. In young fruits and bark of one-year-old shoots PPV was difficult to detect from May to August.
The PPV coat protein region from different regions of Ukraine has been sequenced; data comparison with GenBank inputs showed homology with PPV strain D.
Budzanivska, I., Usko, L., Gospodaryk, A., Melnyk, M. and Polischuk, V. (2011). EPIDEMIOLOGY OF SHARKA DISEASE IN UKRAINE. Acta Hortic. 899, 57-63
DOI: 10.17660/ActaHortic.2011.899.6
https://doi.org/10.17660/ActaHortic.2011.899.6
Plum pox virus, sharka disease, epidemiology, spreading, Ukraine
English

Acta Horticulturae