栽培在温带和地中海地区的核果类和仁果类果树,至少受到丁香假单胞杆菌(Pseudomonas sy-ringae)4个变种,即 syringae、morsprunorum、papulans 和 persicae 的侵染。国际上认为 syringae 变种在这些病原物中最为重要.在南非,syringae 变种导致核果类果树溃疡、苹果树皮疱斑和梨花枯萎.在其它国家,morsprunorum 变种使樱桃和其它核果类果树发生叶斑和溃疡.但在南非,该变种实际上仅 The drupe and pome fruit trees, cultivated in temperate and Mediterranean regions, are at least infected with 4 varieties of Pseudomonas sy-ringae, namely syringae, morsprunorum, papulans and persicae. Syringae variants are internationally considered to be the most important of these pathogens. In South Africa, syringae variants lead to drupe of fruit trees, blisters of apple bark blisters and pears.In other countries, the morsprunorum variant causes leaf spots and / But in South Africa, the variant is actually only