Nuts of Corylus avellana L. have necrotic lesions (pics). What can be a casual agent? Such disease is rather usual in local forest.
Dear Dr alex
please kindly read the references:
https://www.sciencedirect.com/topics/agricultural-and-biological.../corylus-avellana
forest.jrc.ec.europa.eu/media/atlas/Corylus_avellana.pdf
Dear Alex Ignatov,
Please have a look at this useful link.
https://www.actahort.org/books/845/845_77.htm
Good luck!
It may be "nut grey necrosis" of hazelnut (Corylus avellana) fruit caused by fungus Fusarium lateritium.
Dear Alex,
Also check it as bacterial blight of hazelnut caused by Gram negative bacterium Xanthomonas arboricola, but nuts are occasionally affected by the disease. Please see the PDF attachments.
Best of luck!
Dear All,
Thank you for the suggestions. we have isolated several fungi and bacteria, and will try to fix the problem next year.
Happy New Year!
Alex
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