Asian grapevine leaf rust, caused by Phakopsora meliosmae-myrianthae, presents symptoms similar to Asian soybean rust, caused by P. pachyrhizi, such as the presence of satellite uredinia and early leaf fall. To shed light on the epidemiological behaviour of these rusts, we compared the monocyclic components of these Phakopsora species and the effects of these pathogens on host photosynthesis over time. Both hosts were inoculated with a 10⁴ urediniospores mL⁻¹ suspension and incubated at 23–25 °C. Incubation and latent periods were simultaneous at 8 days in Asian grapevine leaf rust and 13 days in Asian soybean rust. The minimum infectious periods were 21 days for P. meliosmae-myrianthae and 13 days for P. pachyrhizi. The continuous production of urediniospores through a long infectious period was observed for both pathogens. Both Phakopsora rusts showed an increase in rust severity with similar progress rates to those estimated with the monomolecular model as 0.07 day⁻¹ and 0.02 day⁻¹ for grapevine and soybean rusts, respectively. No increase in the number of lesions was observed from the first assessment, although the number of uredinia increased over time. P. meliosmae-myrianthae and P. pachyrhizi infection reduced the net photosynthetic rates by 22% and 5%, respectively, before the onset of symptoms. Both pathogens withstand non-ideal environmental conditions for secondary infections. We concluded that, although P. meliosmae-myrianthae has a restricted host range on Vitis sp., unlike to P. pachyrhizi with a broad host range, the epidemiological behaviour of P. meliosmae-myrianthae is in some ecological aspects similar to that of P. pachyrhizi.

由Phakopsora meliosmae-myrianthae引起的亚洲葡萄叶锈病，表现出与由P. pachyrhizi引起的亚洲大豆锈病类似的症状，例如存在卫星尿素和早叶衰落。为了阐明这些锈病的流行病学行为，我们比较了这些菜豆种类的单环成分以及这些病原体随时间对宿主光合作用的影响。两名宿主均接种了10 ⁴ urediosiospores mL ^-1悬浮液，并在23–25°C下孵育。亚洲葡萄叶锈病的潜伏期和潜伏期是同时的，分别为8天和13天。P. meliosmae-myrianthae的最小感染期为21天P. pachyrhizi则为13天。观察到两种病原体在较长的感染期中都连续产生了梭梭孢子。两种Phakopsora锈菌均显示出锈病严重程度的提高，与单分子模型所估计的进展速度相似，葡萄和葡萄锈分别为0.07天^-1和0.02天^-1。从第一次评估起，未观察到病灶数量的增加，尽管尿素的数量随时间增加了。P. meliosmae-myrianthae和P. pachyrhizi感染在症状发作之前分别使净光合速率降低了22％和5％。两种病原体都承受非理想的环境条件以继发感染。我们得出的结论是，尽管P. meliosmae-myrianthae在Vitis sp。上具有有限的寄主范围，但不同于P. pachyrhizi具有较大寄主范围，但在某些生态学方面，P。meliosmae-myrianthae的流行病学行为类似于P. pachyrhizi。