RESULTS

(13)

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DISEASE: Drippy nut disease

HOST: Oak

Ooze from young twig inoculated with Brenneria quercina.

Drippy nut disease | Oak

DISEASE: Drippy nut disease

HOST: Oak (Quercus agrifolia)

PATHOGEN: Brenneria quercina

PATHOGEN SYNONYM: Erwinia quercina

SOURCE: M. Schroth

DISEASE: Drippy nut disease

HOST: Oak

Ooze from infected acorn. Copious ooze drips from infected acorns, leaving sticky spots on objects under tree canopy. Infections are associated with insect oviposit wounds.

Drippy nut disease | Oak

DISEASE: Drippy nut disease

HOST: Oak (Quercus agrifolia)

PATHOGEN: Brenneria quercina

PATHOGEN SYNONYM: Erwinia quercina

SOURCE: M. Schroth

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry

Comparison of normal, dark cherries (in hand) with infected, immature cherries with less pigmentation.

X-disease (Western X) or buckskin | Cherry

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry (Prunus avium)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: A. Purcell, M. Davis

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry

Healthy cherry shoot (left) and stunted shoot (right).

X-disease (Western X) or buckskin | Cherry

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry (Prunus avium)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: S. Thomson

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry

Infected trees on 'Mazzard' rootstock (right) may live for years, producing fruit with symptoms. Trees on 'Mahaleb' rootstock (left) usually die rapidly in year of infection, about time of fruit ripening.

X-disease (Western X) or buckskin | Cherry

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry (Prunus avium)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: S. Thomson

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry

X-disease causes undersized, yellowish fruit. Diseased branches turn rusty red near end of season. Some defoliation occurs on diseased branches.

X-disease (Western X) or buckskin | Cherry

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry (Prunus cerasus)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: A. Jones

DISEASE: Xanthomonas wilt

HOST: Banana

Cross sections exposing discoloration of infected fruit.

Xanthomonas wilt | Banana

DISEASE: Xanthomonas wilt

HOST: Banana (Musa × paradisiaca 'Pisang Awak')

PATHOGEN: Xanthomonas campestris pv. musacearum

PATHOGEN SYNONYM: Xanthomonas campestris

SOURCE: I. Buddenhagen

DISEASE: Xanthomonas wilt

HOST: Banana

Sliced diseased stem exposing discolored vascular tissues and bacterial ooze.

Xanthomonas wilt | Banana

DISEASE: Xanthomonas wilt

HOST: Banana (Musa × paradisiaca 'Pisang Awak')

PATHOGEN: Xanthomonas campestris pv. musacearum

PATHOGEN SYNONYM: Xanthomonas campestris

SOURCE: I. Buddenhagen

DISEASE: Xanthomonas wilt

HOST: Banana

Longitudinal sections of fruit exposing brownish red diseased tissues.

Xanthomonas wilt | Banana

DISEASE: Xanthomonas wilt

HOST: Banana (Musa × paradisiaca 'Pisang Awak')

PATHOGEN: Xanthomonas campestris pv. musacearum

PATHOGEN SYNONYM: Xanthomonas campestris

SOURCE: I. Buddenhagen