Copper sprays have been widely used for control of endemic citrus canker caused by Xanthomonas citri subsp. citri in citrus-growing areas for more than 2 decades. Xanthomonas alfalfae subsp. citrumelonis populations were also exposed to frequent sprays of copper for several years as a protective measure against citrus bacterial spot (CBS) in Florida citrus nurseries. Long-term use of these bact...

Asiatic citrus canker is a major disease worldwide, and its causal agent, Xanthomonas citri pv. citri, is listed as a quarantine organism in many countries. Analysis of the molecular epidemiology of this bacterium is hindered by a lack of molecular typing techniques suitable for surveillance and outbreak investigation. We report a comparative evaluation of three typing techniques, amplified fra...

Citrus canker is a citrus disease species that created by the bacterium Xanthomonas citri subsp.citri. Many citrus, such as oranges, lime, and grapefruit are affected by the infectious bacteria and stems, leaves and fruits are experiencing loss. In this experiment antibacterial effects of five kinds of antibiotics including ampicillin, kanamycin, chloramphenicol, penicillin, streptomycin, Crono...

Citrus huanglongbing (HLB), or greening disease, is strongly associated with any of three nonculturable gram-negative bacteria belonging to 'Candidatus Liberibacter spp.' 'Ca. Liberibacter spp.' are transmitted by citrus psyllids to all commercial cultivars of citrus. The diseases can be lethal to citrus and have recently become widespread in both São Paulo, Brazil, and Florida, United States, ...

Citrus canker, caused by the bacterium Xanthomonas citri (Xcc), is one of most devastating diseases for citrus industry. Xylose a constituent cell wall plants, and ability Xcc to use this carbohydrate may play role in virulence. has two genes codifying xylose isomerase (XI), bifunctional enzyme that interconverts D-xylose into D-xylulose D-glucose D-fructose. The aim work was investigate functi...

The importance of the citrus crops is recognized throughout world. Despite tremendous advancements in agricultural technology, fruit production still considered a significant challenge. Various biotic factors have trampled down rate Citrus many places. Among them, canker caused by Xanthomonas axonopodis pv. citri (Xac) and (Xcc) great importance. Infection Xac leads to lesion development leaves...