A synoptic review of plant disease epidemics and outbreaks published in 2022

Phytopathology, Год журнала: 2024, Номер 114(8), С. 1717 - 1732

Опубликована: Май 9, 2024

This scientometric study reviews the scientific literature and CABI distribution records published in 2022 to find evidence of major disease outbreaks first reports pathogens new locations or on hosts. is second time we have done this, this builds our work documenting analyzing from 2021. Pathogens with three more articles identified were

Язык: Английский

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Developing epidemiological preparedness for a plant disease invasion: Modelling citrus huánglóngbìng in the European Union

Plants People Planet, Год журнала: 2025, Номер unknown

Опубликована: Фев. 24, 2025

Societal Impact Statement Huánglóngbìng (HLB) is a bacterial disease of citrus that has significantly impacted Brazil and the United States, although production in Mediterranean Basin remains unaffected. By developing mathematical model spread Spain, we tested surveillance control strategies before any future HLB entry EU. We found while some might be maintained by roguing, this requires extensive significant chemical control, perhaps also including testing psyllids (which pathogen) for DNA. Our work highlights key importance early detection (including asymptomatic infection) vector management. Summary (HLB; greening) most damaging worldwide. While States have been affected decades, not reported European Union (EU). However, vector, African psyllid, already Portugal Spain. In 2023, major Asian was first Cyprus. develop landscape‐scale, epidemiological model, accounting heterogeneous cultivation dispersal, as well climate use our to predict dynamics an epidemic vectored psyllid high‐density areas assessing strategies. Without management, large infected within 10–20 years. Even with visual surveillance, will widespread on detection, making eradication unlikely. Nevertheless, increased inspection roguing following particularly if coupled intensive insecticide use, could sustain citriculture decade or more, albeit reduced production. effective may require application rates and/or active substances no longer authorised Strategies targeting infection more successful. Detection bacteriliferous vectors—sometimes possible long plants show symptoms—could reduce lags management commences. If HLB‐positive vectors were followed sprays, greatly improve outcomes. modelling component preparedness pathogen invasion is, at least somewhat, predictable advance.

Язык: Английский

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Diversification of an emerging bacterial plant pathogen; insights into the global spread of Xanthomonas euvesicatoria pv. perforans

PLoS Pathogens, Год журнала: 2025, Номер 21(4), С. e1013036 - e1013036

Опубликована: Апрель 9, 2025

Emerging and re-emerging plant diseases continue to present multifarious threats global food security. Considerable recent efforts are therefore being channeled towards understanding the nature of pathogen emergence, their spread evolution. Xanthomonas euvesicatoria pv. perforans (Xep ) , one causal agents bacterial spot tomato, rapidly emerged displaced other xanthomonads in many tomato production regions around world. In less than three decades, it has become a dominant xanthomonad systems across world presents compelling example for diversification recently pathogens. Although Xep been continuously monitored Florida since its discovery, population structure evolution at genome-scale is yet be fully explored. The objectives this work were determine genetic diversity globally ascertain if different contain genetically distinct populations, examine relatedness strains collected seed areas East Asia regions, evaluate variation type III secretion effectors, which critical pathogenicity virulence factors, relationship structure. We used genome data from 270 13 countries phylogenetic analysis characterization effector gene among strains. Our results showed notable pathogen. found similar distant including over past 100 years, consistent with intercontinental dissemination hybrid chains. Evolution pangenome, acquisition loss secreted apparent within lineages. long-distance movement pathogen, together variants that may not widely distributed, poses risks emergence new production.

Язык: Английский

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New Approaches to Plant Pathogen Detection and Disease Diagnosis

Phytopathology, Год журнала: 2024, Номер unknown

Опубликована: Сен. 12, 2024

Detecting plant pathogens and diagnosing diseases are critical components of successful pest management. These key areas have undergone significant advancements driven by breakthroughs in molecular biology remote sensing technologies within the realm precision agriculture. Notably, nucleic acid amplification techniques, with recent emphasis on sequencing procedures, particularly next-generation sequencing, enabled improved DNA or RNA detection protocols that now enable previously unthinkable strategies aimed at dissecting microbiota, including disease-causing components. Simultaneously, domain has seen emergence cutting-edge imaging sensor integration powerful computational tools, such as machine learning. innovations spectral analysis foliar symptoms specific pathogen-induced alterations, making spectroscopy thermal fundamental tools for large-scale disease surveillance monitoring. contribute significantly to understanding temporal spatial dynamics diseases.

Язык: Английский

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Risk-based regionalization approach for area-wide management of HLB vectors in the Mediterranean Basin

Frontiers in Plant Science, Год журнала: 2023, Номер 14

Опубликована: Дек. 4, 2023

Huanglongbing (HLB) is one of the most devastating citrus diseases worldwide. It associated with non-culture bacteria Candidatus Liberibacter spp., which can be transmitted by grafting and/or psyllid vectors Diaphorina citri (ACP) and Trioza erytreae (AfCP). Although HLB has not been reported in Mediterranean Basin to date, both are present, thus represent a serious threat industry this region. Resistant cultivars or effective therapeutic treatments currently available for HLB. Nevertheless, area-wide pest management via coordinated efforts over large areas implemented Brazil, China USA control. This study proposes an open access flexible methodology address Basin. Based on risk-based approach considers climatic information other variables that may influence vector introduction spread, such as conventional, organic, abandoned residential well transportation corridors, division (PMAs) proposed. The size location these PMAs were estimated means hierarchical clustering algorithm spatial constraints whose performance was assessed under different configuration scenarios. proposal assist policymakers citrus-growing risk planning case spread possible disease. Additionally, it valuable resource inform opinion dynamic models, enabling identification pivotal factors success control measures.

Язык: Английский

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Phylogenomic analysis of 343 Xanthomonas citri pv. citri strains unravels introduction history and dispersal paths

PLoS Pathogens, Год журнала: 2023, Номер 19(12), С. e1011876 - e1011876

Опубликована: Дек. 15, 2023

Xanthomonas citri pv. (Xcc) causes the devastating citrus canker disease. Xcc is known to have been introduced into Florida, USA in at least three different events 1915, 1986 and 1995 with first two claimed be eradicated. It was questioned whether introduction has successfully Furthermore, it unknown how spread throughout groves Florida. In this study, we investigated population structure of address these questions. We sequenced whole genome 343 strains collected from Florida between 1997 2016. Our analysis revealed distinct clusters Xcc. data strongly indicate that eradication not successful were present samples 8 counties after 1994. Importantly, our Cluster 2 strains, which are all 20 citrus-producing sampled originated event Miami area 1995. suggest Polk County epicenter dispersal consistent fact major hurricanes passed through 2004. As copper-based products extensively used control canker, also developed resistance copper. Notably, none contained copper genes. Twenty randomly selected displayed sensitivity Overall, study provides valuable insights introduction, eradication, spread,

Язык: Английский

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Dynamics of ‘Candidatus Liberibacter asiaticus’ Growth, Concentrations of Reactive Oxygen Species, and Ion Leakage in Huanglongbing-Positive Sweet Orange

Phytopathology, Год журнала: 2024, Номер 114(5), С. 961 - 970

Опубликована: Март 13, 2024

Citrus Huanglongbing (HLB) caused by '

Язык: Английский

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Intercontinental dissemination and diversification ofXanthomonas perforansin tomato production

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Март 22, 2024

Abstract Emerging and re-emerging plant diseases continue to present multifarious threats global food security. Considerable recent efforts are therefore being channeled towards understanding the nature of pathogen emergence, their spread evolution. Xanthomonas euvesicatoria pv. perforans (Xep ), one causal agents bacterial spot tomato, rapidly emerged displaced other xanthomonads in tomato production regions around world. In less than three decades, it has become a dominant xanthomonad systems across world presents model for diversification recently pathogens. Although Xep been continuously monitored Florida since its discovery, population structure evolution at genome-scale is yet be fully explored. The objectives this work were determine genetic diversity globally ascertain if different contain genetically distinct populations, examine relatedness strains collected seed areas East Asia regions, evaluate variation type III effectors, which critical pathogenicity virulence factors, relationship structure. We used genome data from 270 13 countries phylogenetic analysis characterization Xop effector gene among strains. Our results showed notable pathogen. found similar distant including over past 100 years, consistent with intercontinental dissemination hybrid chains. Evolution pangenome, acquisition loss secreted apparent within lineages. long-distance movement pathogen, together variants that may not widely distributed, poses risks emergence new production.

Язык: Английский

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Developing epidemiological preparedness for a plant disease invasion: modelling citrus huanglongbingin the European Union

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Июнь 6, 2024

Abstract Huánglóngbíng (HLB; citrus greening) is the most damaging disease of worldwide. While production in USA and Brazil have been affected for decades, HLB has not detected European Union (EU). However, psyllid vectors already invaded spread Portugal Spain, 2023 species known to vector Americas was first reported within EU. We develop a landscape-scale, epidemiological model, accounting heterogeneous cultivation dispersal, as well climate management. use our model predict dynamics following introduction into high-density areas assessing detection control strategies. Even with significant visual surveillance, we any epidemic will be widespread on detection, eradication unlikely. Introducing increased inspection roguing particularly if coupled intensive insecticide use, could potentially sustain some time. this may require chemical application rates that are permissible Disease management strategies targeting asymptomatic infection likely lead more successful outcomes. Our work highlights modelling key component developing preparedness pathogen invasion is, at least somewhat, predictable advance.

Язык: Английский

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Integrated analyses of the plant and soil microbiome identify Phytopythium vexans as agent of the Kiwifruit Vine Decline Syndrome

Plant and Soil, Год журнала: 2024, Номер unknown

Опубликована: Авг. 14, 2024

Abstract Background and aims The Kiwifruit Vine Decline Syndrome (KVDS) is a disease that currently challenge for kiwifruit production in Italy, it spreading new areas. However, the causal agent of this syndrome has not been clearly identified, we still know little about overall effects KVDS on interactions between host plant its microbiome. Methods In study, combined metabarcoding targeted isolation (leaf baiting) to characterize changes rhizosphere root microbiomes associated with symptoms KVDS. Results Our results suggest impact bacterial, fungal, oomycete communities soil roots, detected weak signatures potential dysbiosis. On other hand, found consistent association Phytopythium vexans samples from plants symptomatic KVDS, which matches nucleotide sequences isolates obtained through baiting and, partially, previous studies. Conclusion While our support idea P. might be major candidate there are several unanswered questions need addressed before being able provide effective solutions emerging production.

Язык: Английский

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