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R247 Importance of PMTV in Scottish Seed

Publication Date: 
16 August 2011
Author/Contact :
Gerry Saddler

Contractor :

Full Research Project Title: The importance of potato mop top virus in Scottish seed potatoes
Duration: April 2004 - December 2007

Aim: To improve the understanding of PMTV in terms of:transmission rate, disease development, yield and quality and the role of the powdery scab fungus (Spongospora subterranea) in infection.

PMTV has become more common in potato crops. Losses due to the virus occur primarily through the rejection of ware potatoes, although seed exporters are increasingly seeing the impact of the virus as an increasing number of seed importing countries designate PMTV a quarantine organism.

  • the transmission rate from mother to daughter tubers
  • the relative contribution of seed and soil inoculum to disease development
  • the effect of PMTV on yield and quality
  • the role of the powdery scab fungus (Spongospora subterranea) in PMTV infection.

As a result of the work much more is known about how the virus is transmitted and infested soil has been shown to be the most important source of the virus. For more details of the work see the final report below.

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