This article is a list of diseases of hazelnut (Corylus avellana & Corylus spp.).
Bacterial diseases
Fungal diseases
Viral diseases
Phytoplasmal and spiroplasmal diseases
Phytoplasmal and spiroplasmal diseases
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Filbert Stunt
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unknown, suspect a phytoplasma
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Hazelnut Yellows
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phytoplasma
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Miscellaneous diseases and disorders
Miscellaneous diseases and disorders
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Blanks
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empty nut shells, cause unknown
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Brown Stain
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brown liquefied portions of shell and kernel, cause unknown
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Catkin Blast
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deformed catkins, cause unknown
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Sun Scald
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high temperature
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Wet Feet
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saturated soil conditions for extended periods.
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References