Journal
EUROPEAN JOURNAL OF PLANT PATHOLOGY
Volume -, Issue -, Pages -Publisher
SPRINGER
DOI: 10.1007/s10658-023-02755-3
Keywords
Bacterial blast; Cherry canker; Prunus; Cherry; Pseudomonas
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Bacterial canker of cherry is a worldwide problem for stone fruit production, including in New Zealand. Six pathovars of the bacterium Pseudomonas syringae have been identified as the cause of bacterial canker on Prunus species, with Pss, Psm1, and P. s. pv. persicae being the pathogens of Prunus species in New Zealand. The disease causes extensive canker development and gummosis on sweet cherry, leading to tree decline and significant losses in young orchards.
Bacterial canker of cherry is a major constraint to stone fruit production worldwide, including New Zealand. Six pathovars of the bacterium Pseudomonas syringae are known to cause bacterial canker on Prunus species. From those six pathovars, P. s. pv. syringae (Pss), P. s. pv. morsprunorum race 1 (Psm1) and P. s. pv. persicae have been reported as pathogens of Prunus species in New Zealand, and Pss and Psm1 on sweet cherry (Pr. avium). On sweet cherry, extensive development of cankers and gummosis is usually observed, particularly during late winter and spring, with the progressive decline of trees resulting from the death of branches or death of the plant. In young orchards in New Zealand, losses of 20-50%, and sometimes the removal of entire cherry blocks have been observed. This review reports on the current knowledge of P. syringae pathovars causing bacterial canker of Prunus species, with specific focus on sweet cherry in New Zealand, and covers their identification, the infection process, virulence associated factors, epidemiology, symptoms, and management strategies.
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