RESULTS

(5)

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DISEASE: Aster yellows

HOST: Aster

Foliar symptoms of chlorosis, malformation of leaves, and phyllody.

Aster yellows | Aster

DISEASE: Aster yellows

HOST: Aster (Aster sp.)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: R. McCoy, M. Davis

DISEASE: Aster yellows

HOST: Aster

Flowers with phyllody (left and center). Healthy flower (right).

Aster yellows | Aster

DISEASE: Aster yellows

HOST: Aster (Aster sp.)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: R. McCoy, M. Davis

DISEASE: Aster yellows

HOST: Aster

Macrosteles sp., a leafhopper vector of aster yellows phytoplasma.

Aster yellows | Aster

DISEASE: Aster yellows

HOST: Aster (Aster sp.)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: J. Clark, A. Purcell, M. Davis

DISEASE: Ratoon stunt

HOST: Sugarcane

Row of disease 'Trojan' plants (left). Healthy row (right).

Ratoon stunt | Sugarcane

DISEASE: Ratoon stunt

HOST: Sugarcane (Saccharum officinarum 'Trojan')

PATHOGEN: Leifsonia xyli subsp. xyli

SOURCE: D. Teakle

DISEASE: Slime flux

HOST: Casuarina

Slime flux occurs on a number of tree species and is always associated with bacteria and yeast. However, the causal agent has not been identified.

Slime flux | Casuarina

DISEASE: Slime flux

HOST: Casuarina (Casuarina equisetifolia)

PATHOGEN: Causal agent unknown

SOURCE: W. Sinclair