Title: Monitoring and assessment of changes in the populations of economically important pathogens of viral, bacterial and fungal origin as well as harmful insects on potato plantations.
Subtask 4. Monitoring of the infectious pressure of potato viruses in Poland as part of seed decision systems

Financing institution:

Implementation period: 2008-2013

Contractor: prof. dr hab. M. Kostiw – subtask manager

Implementing unit: Department of Seed Science and Potato Protection IHAR-PIB in Bonin

Project value: PLN 842,000

Purpose of research:

  • Assessment of aphid pressure of virus vectors and infectious pressure PVY, PVM, PVS and PLRV in 5 cities in Poland
  • Assessment of the advisability of correcting existing PVY and PLRV infectious pressure zones.

Results achieved:

  • It was found that PLRV pressure was very low throughout the entire observation area. Therefore, it can be included in zone 1a of PLRV infectious pressure, which is the most favorable for potato seed production. According to the current division, the monitored cities belong to zones 2a or 3a (Stare Olesno) of PLRV infectious pressure.
  • PVY infectious pressure was high or very high. Therefore, there is no substantive justification for correcting the current zones of infectious pressure of this virus in the monitored areas. In turn, PVM and PVS infectious pressure varied more depending on the locality. In the southern part of the country it was higher (more aphids A.nasturtii, A.frangulae and M.persicae nha leaves of plants), also compared to the risk of PVY, than in the north, where it was similar in all 3 viruses (PVY, PVM and PVS) .
  • The results of the pressure of PVY, PVm, PVS and PLRV in particular periods of the growing season (studies in Bonin) showed that PVY was the greatest threat to potatoes and spread intensively already in the very early vegetation period of the plant, and most intensively in the first decade of July. PVM and PVS pressure was lower than PVY, and the highest occurred in the period from the third decade of June to July II. Also in these studies there was virtually no spread of PLRV.