经在陕西地区研究发现,苹果锈病和梨锈病两种锈菌的转主寄主是不同类型的桧柏:梨锈菌的转主寄主是两型叶桧柏,其树冠较稀疏,分枝角度较大,具针叶和鳞叶,锈菌在其上形成纺锤形瘿瘤,梨锈菌也可寄生于龙柏;苹果锈菌的转主寄主是针叶型桧柏,其树冠较紧凑,分枝角度小,只具针叶,锈菌在其上形成球形或半球形的瘿瘤。另外, The study found in Shaanxi Province, apple rust and pear rust are the main hosts of two kinds of rust are the main types of juniper: pear turnip host is the main type two leaves cypress cypress, the crown is more sparse, branching angle Large, with coniferous and scale leaves, rust-shaped spindle tumor formed on it, pear rust can also be parasitic on Cypress; apple rust host is the main coniferous Cypress, its crown is more compact, points Branch angle is small, only conifers, rust on it to form spherical or hemispherical nodules. In addition,