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David Humphries

Chalara fraxinea - Generic thread

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Chalara fraxinea rolls off the tongue so much better than Hymenoscyphus pseudoalbidus!


From Wicki "Chalara fraxinea was only the asexual (anamorphic) stage of a fungus that was subsequently named Hymenoscyphus pseudoalbidus."


This is what the sexual form of the fungus looks like.




A search for "Hymenoscyphus pseudoalbidus" brings up many wordy scientific research data/material from all over the world.


Here is a link to what currently been posted about this fungal disease on Wickipeadia:


Hymenoscyphus pseudoalbidus - Wikipedia, the free encyclopedia

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Is chalara fraxinea a Japanese import?


Found this article on the Beeb's website, new research seems to suggest that ash dieback disease may have originated in Japan or Korea, where the same fungus seems to co-exist with indigenous ash tree species.


Dr Joan Webber (FR) mentioned this fact on Monday at the Ickworth conference.


I don't recall there being any specific mention of how it got to europe though.



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New genetics project could help save the ash tree


A Queen Mary scientist will embark on a new project to decode the ash tree’s entire genetic sequence in the hope of stopping Britain’s trees from being completely devastated by the Chalara ash dieback fungal disease.


A small percentage of ash trees in Denmark are showing some resistance to the fungus. By decoding the tree’s genetic sequence, scientists will take a crucial first step towards identifying the genes that confer this resistance.


Together with field trials and breeding programmes, this knowledge will help produce a more resilient strain of the tree.


Project leader, Dr Richard Buggs from Queen Mary’s School of Biological and Chemical Sciences, said: ‘Sequencing the ash genome is a foundational step towards discovering the genetic basis of resistance to ash dieback: the future of ash trees in Britain may depend on this. At Queen Mary, University of London we will build on our experience of sequencing the birch genome to optimise this ash genome project.’


The researchers expect to have a first draft of the tree’s entire genetic sequence by August 2013. Once sequencing is complete, they plan to make it publicly available for use by other researchers.


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What's the advice on leaf litter? Burn - not mulch or compost?


Have a look through the DEFRA pdf guidance posted on this thread.......




Specifically questions 4&5 on page 4 aimed at public and local authority leaf disposal







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Im currently doing a research project at askham bryan college on Chalara fraxinea ive allready done 1 questionnaire which i had good responses to, now ive made a 2nd one to try get an idea of the spread of the disease etc. would appreciate responses massively!

Has the UK government done enough to combat Chalara fraxinea Survey



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