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R423 Blight Population Changes

Publication Date: 
21 June 2018
Author/Contact :
Author/Contact: 
David Cooke

Contractor :
Contractor: 
James Hutton Institute (JHI)

Reference :

Reference number: 
R423 (completed) and 11120012 (ongoing)

GB Late Blight Populations

Fight Against Blight: monitoring Phytophthora infestans populations in GB

Samples submitted by blight scouts are used to monitor P. infestans in GB on an annual basis. During 2009 - 2011, additional research work was carried out to study the characteristics of the current populations and their implications for disease incidence, severity and control. Lab tests were used to study P. infestans isolates for aggressiveness, response to different temperature and humidity regimes, type of spore germination and their ability to infect and survive on potato tubers.  The survival of P. infestans sexual oospores was investigated in a long-term study that involved field burial and recovery of samples that were tested for their viability in several different bioassays. The competitive ability of different pathogen lineages was also examined in a field trial in which a late blight epidemic was initiated and carefully tracked. The results are provided in the R423 final report (below). 

The results from the annual FAB monitoring for the 2014 - 2017 growing seasons are also provided below. 

Reports

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