First report in Myanmar of Xanthomonas axonopodis pv. mangiferaeindicae causing mango bacterial canker on Mangifera indica.
Ah-You N., Gagnevin L., Pruvost O., Myint N. T., Johnson G. I.
Author Affiliation: CIRAD-Université de la Réunion, UMR PVBMT, Saint Pierre, La Réunion, F-97410, France.
Plant Disease 91 :1686
Abstract : Bacterial canker of mango (or bacterial black spot) caused by Xanthomonas axonopodis pv. mangiferaeindicae is a disease of economic importance in tropical and subtropical producing areas. It can cause severe infection in a wide range of mango cultivars and induce raised, angular, black leaf lesions, sometimes with a chlorotic halo. Several months after infection, leaf lesions dry and turn light brown or ash grey. Severe leaf infection may result in abscission. Fruit symptoms appear as small, water-soaked spots on the lenticels. These spots later become star shaped, erumpent, and exude an infectious gum. Often, a tear stain: infection pattern is observed on the fruit. Severe fruit infections will cause premature fruit drop. Twig cankers are potential sources of inoculum and weaken branch resistance to winds. Suspected leaf lesions of bacterial canker were collected from mango nursery stock cv. Yin Kwe at a nursery in Yangon, Myanmar, during March 2007. Based on multidimensional scaling, the Myanmar isolates were identified as X. axonopodis pv. mangiferaeindicae and were most closely related to group B strains that were isolated from mango in India and Eastern Asia.