#Liberibacter
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phytopathology.bsky.social
Diann S. Achor et al. proposed a sequential disease development model of citrus #huanglongbing, cased by the phloem-colonizing ‘Candidatus Liberibacter asiaticus’. Learn more: https://doi.org/10.1094/PHYTO-01-26-0019-R
Fig. 5. Light microscopy and transmission electron microscopy (TEM) analyses of root tissues of Citrus sinensis cultivar Valencia kept in the growth room.
September 21, 2026 at 4:09 PM
plant-sci.bsky.social
🌿🧬 HLB isn't a classic bacterial infection—it's an immune-mediated disease.

CLas triggers chronic effector-triggered immunity in citrus, redefining how we understand and manage this devastating pathogen. #plantscience @cp-trendsplantsci.bsky.social www.cell.com/trends/plant...
Immune activation drives citrus Huanglongbing
Citrus Huanglongbing (HLB), caused by the phloem-limited bacterium Candidatus Liberibacter asiaticus (CLas) and considered the most destructive citrus disease worldwide, has long been regarded as a ty...
www.cell.com
September 12, 2026 at 10:40 AM
cp-trendsplantsci.bsky.social
Immune activation drives citrus Huanglongbing #plantscience
Immune activation drives citrus Huanglongbing
Citrus Huanglongbing (HLB), caused by the phloem-limited bacterium Candidatus Liberibacter asiaticus (CLas) and considered the most destructive citrus disease worldwide, has long been regarded as a typical bacterial infection. However, recent compelling evidence shows that CLas drives HLB through chronic effector-triggered immunity, not via direct pathogenicity, thereby redefining HLB as an immune-mediated disease (Huang et al.).
dlvr.it
September 9, 2026 at 12:40 PM
jennyynnej.bsky.social
My birthday was … six days ago.

My birthday wish was apparently not granted.

——
it still lives. — citrus aurantium - disease —— The most dangerous citrus disease is Huanglongbing (HLB), also known as citrus greening disease, which is caused by the bacterium Candidatus Liberibacter and is spread by the Asian citrus psyllid. This disease is fatal to citrus trees and has led to significant declines in citrus production worldwide.
September 3, 2026 at 8:34 PM
ucdavisplants.bsky.social
🌱 From Phytopathology: Foliar chitosan and harpins boosted citrus immunity, delaying HLB infection and slowing the growth of the disease-causing bacterium in field trials. (Gitta Coaker)

▶️ apsjournals.apsnet.org/doi/10.1094/...

#PlantScience #PlantPathology
Foliar Applications of Microbe-Associated Molecular Pattern Molecules Enhance Citrus Resistance Against Huanglongbing | Phytopathology®
Citrus Huanglongbing (HLB) associated with ‘Candidatus Liberibacter asiaticus’ (CLas), a biotrophic pathogen, is a devastating citrus diseases worldwide. Enhancing host plant resistance through elicit...
apsjournals.apsnet.org
August 31, 2026 at 3:49 PM
commsbio.nature.com
Phylogenomics of #Liberibacter sheds light on new species and strain diversity, putative horizontal transmission, and nutritional functions in willow psyllid symbioses within #riparian ecosystems 🌿🦠 @hansenlab.bsky.social

PDF available: doi.org/10.1038/s420...
An ecological corridor reveals new Liberibacter taxa along a latitudinal transect of Salix and Urtica - Communications Biology
Phylogenomics of Liberibacter sheds light on new species and strain diversity, putative horizontal transmission, and nutritional functions in willow psyllid symbioses within riparian ecosystems
doi.org
August 21, 2026 at 2:57 PM
hansenlab.bsky.social
🎉 New paper! We followed an ecological transect across Europe and uncovered new Liberibacter diversity—including ‘Ca. Liberibacter saliceti’ and a new Ca. L. psyllidaureus haplotype. Riparian ecosystems may be hotspots for Liberibacter diversity, transmission & symbiosis. 🌿🦠
doi.org/10.1038/s420...
An ecological corridor reveals new Liberibacter taxa along a latitudinal transect of Salix and Urtica - Communications Biology
Phylogenomics of Liberibacter sheds light on new species and strain diversity, putative horizontal transmission, and nutritional functions in willow psyllid symbioses within riparian ecosystems
doi.org
August 20, 2026 at 4:21 PM
biorxiv-plants.bsky.social
Antimicrobial peptides expressed by plant-engineered 'symbiont' technology reduces titers and disease symptoms of "Candidatus Liberibacter solanacearum" in potato https://www.biorxiv.org/content/10.64898/2026.08.07.743526v1
August 10, 2026 at 11:06 AM
biorxivpreprint.bsky.social
Antimicrobial peptides expressed by plant-engineered 'symbiont' technology reduces titers and disease symptoms of "Candidatus Liberibacter solanacearum" in potato https://www.biorxiv.org/content/10.64898/2026.08.07.743526v1
August 10, 2026 at 11:06 AM
nieuweoogst.bsky.social
China heeft de importeisen voor pootgoed en diverse groentezaden aangescherpt om de zebrachipbacterie buiten de deur te houden. Voor pootgoed uit landen waar de bacterie voorkomt gaat de Chinese markt op slot. 🥔 #pootgoed #China
China scherpt importeisen voor pootgoed aan vanwege zebrachipbacterie
China heeft op 1 augustus strengere fytosanitaire eisen ingevoerd voor pootaardappelen en diverse groentezaden om de introductie van de bacterie Candidatus Liberibacter solanacearum (CLso) te voorkome...
www.nieuweoogst.nl
August 5, 2026 at 2:57 PM
elife.bsky.social
Dopamine and its receptor <i>DcDop2</i> are involved in the coevolution between ‘<i>Candidatus</i> Liberibacter asiaticus’ and <i>Diaphorina citri</i>
Dopamine and its receptor DcDop2 are involved in the coevolution between ‘Candidatus Liberibacter asiaticus’ and Diaphorina citri
CLas hijacks the DA/DcDop2-miR-31a-AKH-JH signaling cascade to improve D. citri lipid metabolism and fecundity, while simultaneously promoting its replication.
buff.ly
August 3, 2026 at 11:26 AM
plantdiseasej.bsky.social
Leandro J. S. Shibutani, Isabela V. Primiano, and Renato B. Bassanezi found that reducing spray intervals can limit ‘Candidatus Liberibacter asiaticus’ transmission during periods of shoot growth and continuous vector pressure: https://doi.org/10.1094/PDIS-08-25-1758-RE #plantdisease
Fig. 1. Schematic representation of experiments
August 1, 2026 at 9:17 PM
phytopathology.bsky.social
Jorge Santiago Vazquez and Nabil Killiny provide evidence that #Diaphorina citri energy metabolism and muscle-associated proteins may play key roles in the recognition, interaction, and subsequent transmission of ‘Candidatus Liberibacter asiaticus’: https://doi.org/10.1094/PHYTO-05-25-0166-R
Fig. 2. Far-Western, also known as protein overlay assay, used in the current study. Predicted three-dimensional (3D) structure model and its associated mesh surface of outer membrane proteins and peptidoglycans from ‘Candidatus Liberibacter asiaticus’, from which we obtained the antigenic domain sequences to produce antibodies. Antigenic sequences are gray-highlighted in the predicted models. Protein chains are colored according to the rainbow color spectrum, from blue (N-terminus) to red (C-terminus).
July 27, 2026 at 6:38 PM
plantdiseasej.bsky.social
Lethal wilt is an endemic disease affecting oil palms. Catalina Chaves-Sierra et al. present the first report of ‘Candidatus Liberibacter’ being associated with lethal wilt in oil palms of the Arecaceae family in Colombia: https://doi.org/10.1094/PDIS-10-24-2079-RE #plantdisease
Fig. 4. Venn diagram comparing bacterial genera unique to lethal wilt samples collected in 2019 and 2020 with those shared across both years. Genera were classified based on a confidence threshold cutoff of >97%.
July 17, 2026 at 10:13 PM
pampam698.bsky.social
La maladie du dragon jaune, également appelée Huanglongbing (HLB) ou citrus greening, est l'une des maladies bactériennes les plus graves affectant les agrumes.

Causée par la bactérie Candidatus Liberibacter.
youtu.be/NezYRzHwPpU
Maladie du Dragon jaune : la fin du jus d'orange ?
YouTube video by NTD France
youtu.be
July 16, 2026 at 2:33 PM
cp-cellhostmicrobe.bsky.social
CLas disarms Citrus Defense

· Candidatus Liberibacter asiaticus (CLas) effector SDE10 induces Huanglongbing-like symptoms in citrus
· SDE10 inhibits CsXCP2, which positively regulates salicylic acid via dual mechanisms
· Engineered CsXCP2 counteracts SDE10
www.cell.com/cell-host-mi...
Suppression of host salicylic acid defense by a phloem-colonizing pathogen effector in citrus Huanglongbing
Hu et al. uncover an integrated antagonistic triad (SDE10-CsXCP2-SahA) in the citrus-CLas pathosystem. CsXCP2 plays a dual role in defense response: cleaving CsPR1 to amplify SA signaling while simult...
www.cell.com
June 24, 2026 at 7:23 PM
alexjmcclelland.bsky.social
Suppression of host salicylic acid defense by a phloem-colonizing pathogen effector in citrus Huanglongbing
Citrus Huanglongbing (HLB), caused by Candidatus Liberibacter asiaticus (CLas), severely threatens citrus production. Here, we identify Sec-delivered …
www.sciencedirect.com
June 22, 2026 at 4:23 PM
plantdiseasej.bsky.social
Mingxin Zheng et al. explored the tissue-specific endophytic microbiome responses to ‘Candidatus Liberibacter asiaticus’ in two citrus cultivars: https://doi.org/10.1094/PDIS-07-25-1430-RE #plantdisease #huanglongbing
Fig. 1. Growth performance of citrus plants infected with ‘Candidatus Liberibacter asiaticus’ (CLas) and healthy (mock-grafted) plants. “*” indicates P < 0.05 (leaf versus root). The concentration of CLas for each sample is listed at the bottom of the photo and presented as CLas cells per nanogram of total DNA.
June 21, 2026 at 6:35 PM
plantdiseasej.bsky.social
First identified in Los Angeles in 2012, citrus #huanglongbing has since spread through residential areas across Southern California. Weiqi Luo et al. developed a geospatial risk-based survey model for ‘Candidatus Liberibacter asiaticus’ detection: https://doi.org/10.1094/PDIS-01-25-0075-RE
Fig. 1. Geographic distribution and density of residential citrus trees across seven counties in Southern California. The density ranges are represented by shades of green, with darker greens indicating higher densities of citrus trees. The map shows a marked concentration of residential citrus trees in the urban and suburban regions of Los Angeles and Orange Counties, with a varied distribution throughout the region. Dense clusters of trees are interspersed with areas of sparse tree populations. Regions with higher tree densities may pose a greater risk for the spread of citrus diseases, as the close proximity of trees can enhance the movement and transmission of pests and pathogens. STR = section-township-range.
June 16, 2026 at 6:11 PM
hgpennington.bsky.social
In 2022 I painted huanglongbing aka citrus greening disease, caused by Liberibacter spp. (L. asiaticus, L. africanus or L. americanus).

www.hgpenningtonart....
The painting shows a sour orange branch with three fruit and 10 leaves. The symptoms shown include leaf yellowing, fruit asymmetry, and discolouration of fruit.
June 2, 2026 at 10:00 AM
babygoldie.bsky.social
[2/4] pests - Candidatus Liberibacter solanacearum - in imported plant seeds produced in Italy, South Korea and other countries. This pathogen can cause harm to host plants of the Solanaceae and Apiaceae families such as potatoes, tomatoes, and carrots, seriously affecting crop yield
June 1, 2026 at 6:42 AM
babygoldie.bsky.social
[1/4] 2026-06-01 14:36:22 - [Announcement No. 72 of 2026 of the General Administration of Customs and the Ministry of Agriculture and Rural Affairs (Announcement on Preventing the Introduction of Potato Liberibacter Pathogen)] Recently, China Customs has repeatedly detected quarantine
June 1, 2026 at 6:42 AM
phypapers.bsky.social
PCR-based detection and phylogenetic analysis of Candidatus Liberibacter asiaticus in citrus orchards across Nepal https://pubmed.ncbi.nlm.nih.gov/42201921/
May 28, 2026 at 8:04 AM
phypapers.bsky.social
PCR-based detection and phylogenetic analysis of Candidatus Liberibacter asiaticus in citrus orchards across Nepal https://pubmed.ncbi.nlm.nih.gov/42201921/
May 28, 2026 at 12:51 AM
bob0482.bsky.social
Likely this- Citrus Greening (Huanglongbing or HLB): Caused by the bacterium Candidatus Liberibacter, this is the most serious citrus disease globally. It attacks the plant's vascular system, causing leaves to yellow, fruit to become lopsided and bitter, and eventually killing the tree. --
May 19, 2026 at 10:45 PM