Infection pressure of PVY, PVM, PVS and PLRV in the years 1989–1992 and 1996–2000 under conditions of northern Poland
Michał Kostiw
m.kostiw@ihar.edu.plZakład Nasiennictwa i Ochrony Ziemniaka w Boninie, Instytut Hodowli i Aklimatyzacji Roślin w Radzikowie (Poland)
Abstract
The aim of the investigations carried out in Bonin, Zachodniopomorskie voivodeship, was to assess and compare infection pressure of PVY, PVM, PVS and PLRV both in different years and periods of the growing season. The incidence of PVY was found to be the greatest. Average infection of tubers with this virus for both periods of studies was 47%. Infection with PVS and PVM was at the lower level (17.1% and 8.6%, respectively). The most intense spread of PVY, PVS and PVM was recorded in the approximate period between 21–30 of June and 21–31 of July or 1–10 of August, although the threat of PVY infection lasted throughout the growing season. The relatively great impact of PVY, as compared to that of other viruses, as early as the first phase of plants vegetation strongly indicates that seed production of cultivars susceptible to PVY might be difficult even in conditions of northern Poland, which has been classified as the first (healthy) zone of virus infection pressure. In contrast, the level of infection with PLRV in the years of studies was very low.
Keywords:
infection pressure, potato, tuber infection, virusesReferences
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Authors
Michał Kostiwm.kostiw@ihar.edu.pl
Zakład Nasiennictwa i Ochrony Ziemniaka w Boninie, Instytut Hodowli i Aklimatyzacji Roślin w Radzikowie Poland
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