| four powdery mildew species with catenate conidia infect galium: molecular and morphological evidence. | the erysiphaceae are a group of obligately biotrophic fungi that cause powdery mildew disease of angiosperms. due to their inability to be cultured on artificial media, the taxonomy of the erysiphaceae has generally been based on the morphological characteristics of fresh and herbarium specimens. thus, several morphological species with wide host ranges have long been maintained in this family, even though they clearly consist of several biological species. erysiphe galii has been known as a pow ... | 2009 | 18930816 |