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DISEASE: Carrot yellows

HOST: Carrot

Flowers with shoot proliferation (witches’-broom) (left). Healthy flower (right). Virescence and phyllody of flower parts are common.

Carrot yellows | Carrot

DISEASE: Carrot yellows

HOST: Carrot (Daucus carota)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: M. Schroth

DISEASE: Carrot yellows

HOST: Carrot

Carrot with proliferation of roots. Initial symptoms include yellowing and narrowing of veins of young leaves. The entire leaf later becomes necrotic.

Carrot yellows | Carrot

DISEASE: Carrot yellows

HOST: Carrot (Daucus carota)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: G. S. Abawi

DISEASE: Saber tooth

HOST: Lily

Lily with deformed growth that resembles a saber tooth.

Saber tooth | Lily

DISEASE: Saber tooth

HOST: Lily (Lilium sp. 'Enchantment')

PATHOGEN: Curtobacterium flaccumfaciens pv. oortii

PATHOGEN SYNONYM: Corynebacterium flaccumfaciens subsp. oortii

SOURCE: H. van Hoof, J. van der Wolf

DISEASE: Sweet potato little leaf

HOST: Sweet potato

Infected plant (left) and healthy plant (right).

Sweet potato little leaf | Sweet potato

DISEASE: Sweet potato little leaf

HOST: Sweet potato (Ipomoea batatas)

PATHOGEN: 'Candidatus Phytoplasma aurantifolia'

PATHOGEN SYNONYM: Phytoplasma Peanut witches'-broom group

SOURCE: R. McCoy, M. Davis