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Huanglongbing or citrus greening is a tritrophic disease complex involving citrus host trees, the Asian citrus psyllid or Diaphorina citri insect and a phloem restricted, bacterial pathogen called Candidatus Liberibacter asiaticus. Huanglongbing is considered to be the most devastating of all citrus diseases, and there is currently no adequate control strategy. In Florida, an estimated 40-70% of all citrus trees are infected, and huanglongbing effects include production declines (10-20% per year), diminished fruit quality and increased production costs. See impact on US production..

Credit: Cilia lab

Growing urgency to stop disease
Recent finds of infected citrus trees in San Gabriel Valley have growers and scientists increasingly worried. More..
New CLas field test
A new field test for Liberibacter has been developed using lateral flow technology. More information here.
The Big Squeeze
HLB bacterium influences psyllid
Citrus greening bacterium changes the behavior of bugs to promote its own spread.
Huanglongbing quarantine announced in LA
Huanglongbing quarantine announced in San Gabriel-area of Los Angeles County.
Website Updates
Disease and Annotation sections added
We have added sections with information about the CitrusGreening disease and the psyllid genome annotation process. [Sep 14, 2015]
Revamped CitrusGreening portal
The CitrusGreening portal has been upgraded using the Bootstrap framework to make it responsive on any browsing platform. Please send us your feedback. [Sep 4, 2015]
Weekly Psyllid Annotation video conference meetings
Interested in annotating the Diphorina citri genome using WebApollo? Join us on Wednesdays at 2:15pm EDT. Sign up on basecamp for more information.
First Annual CitrusGreening Solutions meeting
The First Annual CitrusGreening Solutions meeting will be held on June 17th,2015 at Kansas State University, Manhattan, KS.
The Ninth Annual Arthropod Genomics Symposium will be held from June 17, 2015 to June 19, 2015 at the K-State Alumni Center, Kansas State University, Manhattan, KS.
Citrus Research
Psyllid Research
Research Updates
CASPs annotation
Caspases are proteolytic enzymes that cleave aspartic acid of target proteins. The Basecamp page and FTP site contain the data sets and instructions. [Sep 8, 2015]
AMP annotation
Genes producing anti-microbial peptides are a critical part of the immune system of the psyllid. The Basecamp page and FTP site contain the data sets for annotating AMPs. [Sep 3, 2015]
This track contains tblastn matches to the genome for MCOT proteins. MCOT combines gene predictions from Maker, Cufflinks, Oasis and Trinity. It also includes the uniprot annotation if available. [Aug 22, 2015]