Quote:
Originally Posted by Robert Brenchley
It's definitely the A2 strain. I did some googling around just now, and discovered that it's only the oocyte that can survive overwinter in soil. That requires two strains to be involved in a single infection. I can't speak for the US, but as far as I can discover, it's happening rarely if at all in the UK at the moment.
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http://fieldcrop.msu.edu/documents/E1802.pdf
The above link provides all the different subtypes now found in the US as single subtypes as well as those formed by sexual means.
And you're right, it's only the sexual oospores that can survive in soils, even those that freeze, for years.
And I hope that the two mating types are not in my area right now but I just don't have an answer to that. And so far, my plants don't have LB. A bit of Bacterial Speck and some Septoria Leaf Spot, but no LB, fingers crossed.
I should have done my Googling before I answered the question.
