Europe, UK, Ireland

Old foe, new offspring: What do we know about the new, emerging clones of Phytophthora Infestans in Europe?

In an insightful and important article published earlier this week on the EuroBlight website, late blight expert Dr Jens Gronbech Hansen in Denmark asks: What do we know at this time about the new clones of all potato growers’ arche enemy, Phytophthora Infestans? Hansen says that over the last five years EuroBlight has undertaken and coordinated an extensive survey of European populations of the late blight pathogen, P. infestans. The most recent data from the EuroBlight monitoring initiative highlighted the emergence of three new clonal lineages, named EU_36_A2, EU_37_A2 and EU_41_A2, in different parts of Europe. As ever, this raises the question of the epidemic potential of these newcomers, and of their impact on late blight management strategies. Are those strains more aggressive than other types? Are they less sensitive to fungicides? What cultivars are now under threat? Do I have to change my control strategy? These are the questions farmers and potato advisors are asking. Read the full article on the EuroBlight website