LARKSPUR VIRESCENCE
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Larkspur

SOURCE:
R. Raabe
DISEASE:
Larkspur virescence
HOST:
Larkspur
(Delphinium sp.)
Two diseased plants with stunted and small leaves, lack of flower coloration, and bunched flower buds. Healthy plant (left).
PATHOGEN:
'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM:
Phytoplasma Aster yellows group