Survey on the presence of <i>Xylella fastidiosa</i>, the causal agent of olive quick decline syndrome (OQDS) on olives in Jordan

Abu-Obeid, Ibtihal; Al‐Karablieh, Nehaya; Haddadin, Jihad; Omari, Ruba Al; Al-Jabaree, Abdel-Munem; Al-Elaumi, Lina; Mazahreh, Safa

doi:10.1080/03235408.2020.1738764

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…The employed primers (RST31/33) are broadly recognized for the detection of Xf in quarantine programs [31], along with other primers targeting the genomic region 16 S rDNA [31,32], which are more suitable for the proper detection of a bigger number of genetically heterogenous strains of Xf [20]. These results are taken as favorable proof, taking into account that Xf is absent in Morocco, relative to the surveyed tree crops which is consistent with other negative results obtained from different field surveys, recently carried out on the presence of Xf in some other countries such as from Jordan [33] and from Lebanon [5]. Nevertheless, recurrent sizeable surveys in various regions and on various potential host plants are required to hinder its ingress into the country [30].…”

Section: Resultssupporting

confidence: 82%

Continuous Pest Surveillance and Monitoring Constitute a Tool for Sustainable Agriculture: Case of Xylella fastidiosa in Morocco

et al. 2022

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Climate and trade changes are reshaping the cartographic distribution of lethal pervasive pathogens. Among serious emerging challenges is Xylella fastidiosa (Xf), a xylem-limited phytopathogenic bacterium that produces losses and damages to numerous crops of high economic and agronomic importance. Lately, this grave quarantine pathogen has expended its distribution by arriving to several European countries and infecting both wild and cultivated plants, and no cure has been identified so far. Countries without current outbreaks like Morocco, need to monitor theirs crops frequently because detecting diseases in the early stages may reduce the huge losses caused by Xf. For that purpose, inspections were managed in different regions in Morocco from March 2020 to July 2021 to assess the presence of Xf in several growing areas of vulnerable economic crops (i.e., almond, citrus and olive). To extend the likelihood of detection, hosts have been inspected and sampled randomly over different environments including symptomatic and asymptomatic plants. Each sample was screened for the existence of Xf by using the DAS-ELISA commercial kit, while, further analyses were carried out for doubtful samples, by PCR. Results of both tests did not show any positive sample in the investigated areas. This finding is an update on the Xf situation in Morocco and confirms that this country is still a free territory from this bacterium, at least in the monitored regions.

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Section: Resultssupporting

confidence: 82%

Continuous Pest Surveillance and Monitoring Constitute a Tool for Sustainable Agriculture: Case of Xylella fastidiosa in Morocco

et al. 2022

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“…Interpretation of the Terms of Reference EFSA delivered in September 2018 a renovated database of host plants of Xylella spp., taking into account both species of the genus Xylella (X. fastidiosa and X. taiwanensis) (EFSA, 2018), which was further updated in April 2020 (EFSA, 2020). Raw data and interactive reports were published in Zenodo 1 in the EFSA Knowledge Junction community and in Microstrategy 2 platform, together with a Scientific Report.…”

Section: 2mentioning

confidence: 99%

Update of the Xylella spp. host plant database – systematic literature search up to 31 December 2020

Delbianco¹,

Gibin²,

Pasinato³

et al. 2021

EFS2

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Following a request from the European Commission, EFSA was asked to create and regularly update a database of host plant species of Xylella spp. Complying with an extension of the previous mandate, which now covers the period 2021-2026, the current version of Xylella spp. host plant database updates the previous release dated April 2020. Informative data have been extracted from 86 recent publications retrieved through an extensive literature search. This report is related to the fourth version of the database published in Zenodo in the EFSA Knowledge Junction community, covering articles selected from: a systematic literature review conducted up to 31 December 2020, Europhyt outbreak notifications up to 18 March 2021 and communications from research groups and national authorities. Forty-three new host plant species of X. fastidiosa, identified through the data extracted from the selected publications, have been added to the database. Those plant species were reported as naturally or artificially infected by subsp. fastidiosa, multiplex, pauca or unknown (i.e. not reported in the publication) subspecies of X. fastidiosa. New information on the tolerant/resistant response of plant species or varieties to X. fastidiosa infection is also reported. No additional data were retrieved for X. taiwanensis. This new version of the database includes no update on the number of Sequence Types (STs) identified so far, which remains unchanged. The overall number of Xylella spp. host plants determined with at least two different detection methods or positive with one method (between: sequencing, pure culture isolation) reaches now 385 plant species, 179 genera and 67 families. Such numbers rise to 638 plant species, 289 genera and 87 families if considered regardless of the detection method applied. The database will be issued twice per year, with the aim to provide information and scientific support to risk assessors, risk managers and researchers dealing with Xylella spp.

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Xylella fastidiosa Not Detected on Tree Crops After Five Years of Survey

Al‐Karablieh

Abu-Obeid

Al-Elaumi³

et al. 2023

Plant Health Progress

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With the X. fastidiosa outbreak in Europe affecting olive and other major crops, the Jordanian Ministry of Agriculture (MoA) signaled a red warning light to prevent its entry into Jordan. An intensive survey was performed during 2016-2021 to assess its spread in Jordan across a range of agricultural crops in parallel to the previously published survey on olives. Grapevine (no. of samples: 899), stone fruit trees (1480), citrus fruit trees (1225), pome fruit trees (292), and ornamentals plants (1351) growing in Jordan were sampled. Both symptomatic and asymptomatic plants were sampled, in addition to collecting potential insect vectors from Hemiptera species. Plant samples were tested by ELISA (Enzyme-Linked Immunosorbent Assay) kits and their results were confirmed by conventional PCR (Polymerase Chain Reaction) using three sets of primers. Insect samples were tested using RST31/RST33 PCR. The obtained results did not show any confirmed positive results in any sample. These results indicate that X. fastidiosa has not been detected in Jordan despite a comprehensive survey. These results also demonstrate the importance of the monitoring and inspection programs executed by the MoA for detection of X. fastidiosa and identifying its potential insect vectors; these programs should be continued to prevent the entry of this bacterium and its potential insect vectors into Jordan from the neighboring countries.

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Survey on the presence of Xylella fastidiosa, the causal agent of olive quick decline syndrome (OQDS) on olives in Jordan

Cited by 3 publications

References 10 publications

Continuous Pest Surveillance and Monitoring Constitute a Tool for Sustainable Agriculture: Case of Xylella fastidiosa in Morocco

Continuous Pest Surveillance and Monitoring Constitute a Tool for Sustainable Agriculture: Case of Xylella fastidiosa in Morocco

Update of the Xylella spp. host plant database – systematic literature search up to 31 December 2020

Xylella fastidiosa Not Detected on Tree Crops After Five Years of Survey

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