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SYMPTOMS ASSOCIATED WITH XYLELLA FASTIDIOSA INFECTIONS
IN DIFFERENT HOST PLANTS IN APULIA (ITALY)
Prepared by CNR-INSTITUTE FOR SUSTAINABLE PLANT PROTECTION, BARI (ITALY)
PHOTO GALLERY
Version 1.0 | December 2017
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OLIVE QUICK DECLINE SYNDROME
Bacterial infections in Apulia have been found associated with Xylella fastidiosa subspecies pauca - sequence type ST53
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Dessication reproduced in greenhouse on Xf-
inoculated olive plants
Shoot dieback on Xf-inoculated olive plants in greenhouse
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Wilting and dieback
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Olive trees showing quick decline syndrome at advanced stage
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Extensive dessication on young tree
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Olive trees showing quick decline syndrome at advanced stage
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Olive trees showing quick decline syndrome at advanced stage
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08/01/2018
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Olive trees showing quick decline syndrome at advanced stage
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Olive trees showing quick decline syndrome at advanced stage
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Olive trees showing quick decline syndrome at advanced stage
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LEAF SCORCH SYMPTOMS ON INFECTED OLEANDER (NERIUM OLEANDER)
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LEAF SCORCH SYMPTOMS ON XF-INFECTED OLEANDER (NERIUM OLEANDER)
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Yellowing and chlorosis observed on artificial inoculated plants in greenhouse
LEAF SCORCH SYMPTOMS ON XF-INFECTED OLEANDER (NERIUM OLEANDER)
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DESSICATION AND DECLINE ON XF-INFECTED OLEANDER (NERIUM OLEANDER)
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LEAF SCORCH SYMPTOMS ON XF-INFECTED OLEANDER: INITIAL MARGINAL LEAF CHLOROSIS (LEFT),
FOLLOWED BY NECROSIS (RIGHT)
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ALMOND(PRUNUS DULCIS) LEAF SCORCH AND BROWNING
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Symptoms observed in July-August
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Symptoms observed in July-August
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Symptoms observed in July-August
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Symptoms observed in July-August
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Symptoms observed in July-August
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Symptoms observed in July-August
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Symptoms observed in July-August
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CHERRY (PRUNUS AVIUM) LEAF SCORCH AND BROWNING
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Symptoms observed in late July
Leaf scorch symptom affecting a branch, with upward-curling leaves
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Symptoms scored in August
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MYRTLE LEAF MILKWORT (POLYGALA MYRTIFOLIA) LEAF SCORCH | TWIG DESICCATION
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Leaf scorch symptoms and shoot dieback on Xf-inoculated plants grown in greenhouse
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Leaf scorch symptoms and shoot dieback on Xf-inoculated plants grown in greenhouse
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SYMPTOMS ON OTHER HOSTS
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WESTRINGIA FRUTICOSA
Yellowing and dessiccation
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August 2014 Dessication of branches
ACACIA SALIGNA
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August 2014 March 2016
Rapid progression of the symptoms
ACACIA SALIGNA
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August 2014 Extensive dessication
ACACIA SALIGNA
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March 2016 The tree died rapidly and was removed
ACACIA SALIGNA
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Extensive dessication
SPARTIUM JUNCEUM
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Leaf scorch symptoms
ROSMARINUS OFFICINALIS
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MYRTUS COMMUNIS
Yellowing and foliage dessication
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CISTUS CRETICUS
Dessication phenomena
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Leaf scorch symptoms
LAURUS NOBILIS
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Extensive dessication
DODONEA VISCOSA PURPUREA
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Extensive dessication
LAVANDULA ANGUSTIFOLIA
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Leaf scorch symptoms and dieback
GREVILLEA JUNIPERINA
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Leaf scorch symptoms
PHILLYREA LATIFOLIA
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Leaf scorch symptoms and dessication
PHILLYREA LATIFOLIA
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Leaf scorch symptoms
PHILLYREA LATIFOLIA
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EXAMPLES OF ASYMPTOMATIC HOSTS
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RHAMNUS ALATERNUS
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EUPHORBIA TERRACINA
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ASPARAGUS ACUTIFOLIUS
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WESTRINGIA GLABRA
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MYOPORUM INSULARE
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OLIVE QUICK DECLINE SYNDROME PROGRESSION OF THE SYMPTOMS ON THE
INFECTED TREES
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PROGRESSIVE STAGES OF THE “OLIVE QUICK DECLINE SYNDROME”
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2 2. Typical withered and chlorotic leaves representing the initial stage of the dessication phenomena
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«Gigante di Alliste» (Lecce, Italy), 1,500 years old olive tree. September 2014
Initial symptoms of desiccation on few scattered branches
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«Gigante di Alliste» (Lecce, Italy), 1,500 years old olive tree. September 2015
Progression on the canopy of the desiccation phenomena
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«Gigante di Alliste» (Lecce, Italy), 1,500 years old olive tree. July 2016
Severe desiccation
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SYMPTOMS ASSOCIATED WITH XYLELLA FASTIDIOSA INFECTIONS
IN DIFFERENT HOST PLANTS IN APULIA (ITALY)
Version 1.0 | December 2017
This slideshow presentation was prepared in the framework of the
H2020 research Projects:
727987