ELM YELLOWS
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Elm

SOURCE:
W. Sinclair
DISEASE:
Elm yellows
HOST:
Elm
(Ulmus parvifolia)
Elm yellows is characterized by witches'-brooms and stunting. Some cultivars have both yellow and reddish foliar discoloration.
PATHOGEN:
'Candidatus Phytoplasma ulmi'
PATHOGEN SYNONYM:
Phytoplasma Elm yellows group