Angular leaf spot of Phaseolus vulgaris is a serious disease caused by Phaeoisariopsis griseola, in which two major gene pools occur, namely Andean and Middle-American. Sequence analysis of the SSU region of nrDNA revealed the genus Phaeoisariopsis to be indistinguishable from other hyphomycete anamorph genera associated with Mycosphaerella, namely Pseudocercospora and Stigmina. A new combination is therefore proposed in the genus Pseudocercospora, a name to be conserved over Phaeoisariopsis and Stigmina. Further comparisons by means of morphology, cultural characteristics, and DNA sequence analysis of the ITS, calmodulin, and actin gene regions delineated two groups within P. griseola, which are recognised as two formae, namely f. griseola and f. mesoamericana.

中文翻译：

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重新评价豆角斑病病原 Phaeoisariopsis griseola 的分类地位。

菜豆角斑病是由灰褐斑病菌引起的严重病害，其中存在两个主要基因库，即安第斯和中美洲。nrDNA 的 SSU 区域的序列分析揭示了 Phaeoisariopsis 属与其他与 Mycosphaerella 相关的丝状菌无定形属，即 Pseudocercospora 和 Stigmina。因此，在 Pseudocercospora 属中提出了一个新的组合，该名称在 Phaeoisariopsis 和 Stigmina 上保守。通过形态学、培养特征和 ITS、钙调蛋白和肌动蛋白基因区域的 DNA 序列分析的进一步比较在 P. griseola 内划定了两组，它们被认为是两种形式，即 f。griseola 和 f. 中美洲。