RESULTS

(4)

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DISEASE: Aster yellows

HOST: Onion

Infected plants with yellowish, malformed leaves.

Aster yellows | Onion

DISEASE: Aster yellows

HOST: Onion (Allium cepa)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: R. Rowe

DISEASE: Aster yellows

HOST: Onion

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.

Aster yellows | Onion

DISEASE: Aster yellows

HOST: Onion (Allium cepa)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: R. Raabe

DISEASE: Aster yellows

HOST: Strawberry

Aster yellows causes flowers to be entirely phylloid. Young leaves of infected plants are small, chlorotic, and cupped and have short petioles. Red coloration may develop on older leaves.

Aster yellows | Strawberry

DISEASE: Aster yellows

HOST: Strawberry (Fragaria × ananassa)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: S. Guerrini

DISEASE: Aster yellows

HOST: Strawberry

'Marmolada' strawberry with fruit distortion and phyllody of achenes.

Aster yellows | Strawberry

DISEASE: Aster yellows

HOST: Strawberry (Fragaria × ananassa)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: S. Guerrini