These changes will considerably weaken checks on citrus imports. Among other things, citrus fruits intended for industrial processing will be subject to fewer checks than fresh produce from countries affected by citrus canker and citrus black spot. This measure has provoked serious concern in the sector, above all given the large number of cases of black spot disease being detected in citrus fruit from third countries, and owing to the serious damage that the sector could suffer if the disease were to spread to European plantations.
It also seems surprising, bearing in mind the agreement that was recently reached on the new plant health regulation, aimed at stepping up the fight against the spread of diseases from third countries. 2BLADES FOUNDATION - OCT 2016 - Citrus Canker - Multipronged approach to combat citrus disease. "We most definitely need a non-copper control.
Copper builds up in the soil and makes a very toxic growing environment that lasts for decades. I don't think I can over-stress the problem that canker is causing in Florida groves. Although it's still very early in the season, to date I have had more fruit drop from canker than I have from HLB [citrus greening]. " —Bobby Barben, grower The challenge. PARLEMENT EUROPEEN - Réponse à question E-004975-16 Proposed changes to the annexes to Directive 2000/29/EC on plant health ( citrus canker and citrus black spot)
PARLEMENT EUROPEEN - Réponse à question E-004975-16 Proposed changes to the annexes to Directive 2000/29/EC on plant health ( citrus canker and citrus black spot) Appl Environ Microbiol. 2014 Oct; 80(20): 6266–6279. Genomic Insights into the Evolutionary Origin of Xanthomonas axonopodis pv. citri and Its Ecological Relatives. AUSTRALASIAN PLANT DIS 25/02/15 First record of citrus canker, caused by Xanthomonas citri subsp. citri in Solomon Islands. TROPICAL PLANT PATHOLOGY 22/02/16 Prevalence of race 18 of Xanthomonas citri subsp. malvacearum on cotton in Brazil. Mol Plant Microbe Interact. 2016 Feb;29(2):132-42. Reduced Susceptibility to Xanthomonas citri in Transgenic Citrus Expressing the FLS2 Receptor From Nicotiana benthamiana.
Crop Protection Volume 74, August 2015, Induced resistance in sweet orange against Xanthomonas citri subsp. citri by hexanoic acid. PLOS 23/04/13 A Novel Two-Component Response Regulator Links rpf with Biofilm Formation and Virulence of Xanthomonas axonopodis pv. citri. Abstract Citrus bacterial canker caused by Xanthomonas axonopodis pv. citri is a serious disease that impacts citrus production worldwide, and X. axonopodis pv. citri is listed as a quarantine pest in certain countries.
Biofilm formation is important for the successful development of a pathogenic relationship between various bacteria and their host(s). To understand the mechanisms of biofilm formation by X. axonopodis pv. citri strain XW19, the strain was subjected to transposon mutagenesis. One mutant with a mutation in a two-component response regulator gene that was deficient in biofilm formation on a polystyrene microplate was selected for further study. The protein was designated as BfdR for biofilm formation defective regulator.
Citation: Huang T-P, Lu K-M, Chen Y-H (2013) A Novel Two-Component Response Regulator Links rpf with Biofilm Formation and Virulence of Xanthomonas axonopodis pv. citri. Received: January 21, 2013; Accepted: March 26, 2013; Published: April 23, 2013. LSU AG CENTER 07/02/13 New citrus disease found in New Orleans (citrus canker) News Release Distributed 07/02/13 BATON ROUGE, La. – A new disease of citrus called citrus canker has been detected in New Orleans by the U.S.
Department of Agriculture’s Animal and Plant Health Inspection Service, Plant Protection and Quarantine division, according to LSU AgCenter plant scientist Raj Singh. “The disease was first detected in Florida in 1910, and after its initial detection, the disease was declared eradicated twice – in 1933 and 1994,” Singh said. Citrus canker was again detected for a third time in Florida in 1995.
Louisiana has become the second state after Florida in the United States where the disease is positively identified. “It is a serious disease of citrus because it causes defoliation, premature fruit drop, blemished fruits and tree decline, and ultimately, the infected tree stops producing fruit,” Singh said. AUSTRALIAN GOVERNMENT - 2016 - National Diagnostic Protocol for Asiatic Citrus Canker, Xanthomonas citri subsp. citri.
Pak. J. Agri., Agril. Engg., Vet. Sci., 2014, 30 (2): 187-194 PATHOGENIC VARIABILITY AMONG DIFFERENT ISOALTES OF XANTHOMONAS AXONOPODIS PV. CITRI. Journal of Pure and Applied Microbiology (Impact Factor: 0.07). 12/2012 Microbial, Biochemical, Pathogenicity and Molecular Characterization of Xanthomonas axonopodis pv. punicae from Pomegranate. PLOS 04/06/14 A MLVA Genotyping Scheme for Global Surveillance of the Citrus Pathogen Xanthomonas citri pv. citri Suggests a Worldwide Geographical Expansion of a Single Genetic Lineage. The Journal of Plant Pathology 08/2014; 114(114):177-187. Prevalence of canker on seedlings of citrus (Citrus spp.) in selected areas of Bangladesh and its management.
Trop. plant pathol. vol.39 no.6 Brasília Nov./Dec. 2014 Favorable conditions for Xanthomonas axonopodis infection in Eucalyptus spp. Scientific Opinion of the PLH Panel: Xanthomonas axonopodis pv. phaseoli and Xanthomonas fuscans subsp. fuscans pest categorisation. EFSA Journal 2014;12(10):3856 [30 pp.]. doi:10.2903/j.efsa.2014.3856 EFSA Panel on Plant Health (PLH)Panel Members Richard Baker, Claude Bragard, Thierry Candresse, Gianni Gilioli, Jean-Claude Grégoire, Imre Holb, Michael John Jeger, Olia Evtimova Karadjova, Christer Magnusson, David Makowski, Charles Manceau, Maria Navajas, Trond Rafoss, Vittorio Rossi, Jan Schans, Gritta Schrader, Gregor Urek, Irene Vloutoglou, Stephan Winter and Wopke van der Werf.
Acknowledgment The Panel wishes to thank the members of the Working Group on Dir_2000_29_bacteria Marie-Agnès Jacques, Charles Manceau, Emilio Stefani, Emilio Montesinos, Trond Rafoss and Jan Martin van der Wolf for the preparatory work on this scientific opinion, and EFSA staff, Svetla Kozelska, for the support provided to this scientific opinion.Contact. FRONTIERS IN MICROBIOLOGY 23/04/13 Citrus tristeza virus: evolution of complex and varied genotypic groups.
JOURNAL OF BACTERIOLOGY - 2013 - Genome sequence of Xanthomonas axonopodis pv. punicae strain LMG 859. FAPESP - Programme de recherche 2013-2015. The Journal of Animal & Plant Sciences, 23(1): 2013 GENETIC RESPONSE OF CITRUS GERMPLASM AGAINST CITRUS LEAF MINER. Workshop on Interdisciplinary Plant Science 16/12/13 Présentation : Functional genomics approaches in Xanthomonascitri/citrus pa. Central California Tristeza Eradication Agency – 2013 - Présentation : Citrus Pest Detection Program. ARS USDA - 2013 - Présentation : Presence of virulent strains of Citrus tristeza virus (CTV) in California. BMC Microbiology 2013, 13:186 Insights into xanthomonas axonopodis pv. citri biofilm through proteomics. Sci. agric. (Piracicaba, Braz.) vol.70 no.2 Piracicaba Mar./Apr. 2013 Evaluation of the protective capacity of new mild Citrus t. Evaluation of the protective capacity of new mild Citrus tristeza virus (CTV) isolates selected for a preimmunization program Carlos Alexandre Zanutto*; Maria Júlia Corazza; William Mário de Carvalho Nunes; Gerd Walter Müller UEM - Depto. de Agronomia, Núcleo de Pesquisa em Biotecnologia Aplicada, Av.
Colombo, 5790 - 87020-900 - Maringá, PR - Brasil The use of tolerant rootstocks and preimmunization has satisfactorily controlled losses associated with the Citrus tristeza virus (CTV). Several researchers have shown that CTV mild isolates that are selected in the same region where they are used are superior to isolates obtained from other areas. Keywords: SSCP, RFLP, cross-protection, citrus Introduction In the past 90 years, citrus tristeza has been considered one of the most important citrus diseases worldwide (Souza and Müller, 2006). Pêra sweet orange orchards that are severely affected by CTV still exist in different citrus areas of the country. Materials and Methods. GROWING PRODUCE 12/07/13 Citrus Canker Detected In Louisiana - Disease discovery is first U.S. find outside of Florida.
USDA’s Animal and Plant Health Inspection Service (APHIS) has confirmed the identification of Xanthomonas axonopodis pv. citri, the bacterial causal agent of citrus canker, from citrus leaf samples collected from two trees in City Park, New Orleans, Orleans Parish, Louisiana.
This is a new state record. APHIS and the Louisiana Department of Agriculture and Forestry (LDAF) are working together to survey citrus trees in City Park and the surrounding area for citrus canker symptoms. To date, three trees at City Park and a tree in a residential area nearby have been confirmed positive for canker. African Journal of Biotechnology Vol. 9 (54), pp. 9092-9095, 29 December, 2010 Molecular and biochemical characterization of Xan. International Rules for Seed Testing - 2012 - Detection of Xanthomonas axonopodis pv. phaseoli and Xanthomonas axonopodis pv. ph. Mol Plant Pathol. 2012 Aug;13(6):614-29. Top 10 plant pathogenic bacteria in molecular plant pathology. FORMATEX - 2010 - Mechanisms of infection used by Xanthomonas axonopodis pv. citri in citrus canker disease.