ASTER YELLOWS
|
Onion

SOURCE:
R. Raabe
DISEASE:
Aster yellows
HOST:
Onion
(Allium cepa)
Onion flower with unusual symptoms (left) compared with healthy inflorescence (right). Flowers are distorted and often have abnormally long pedicels. Young leaves may have yellow streaks or a general yellowing of basal portions.
PATHOGEN:
'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM:
Phytoplasma Aster yellows group