Peronospora (genus)
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Peronospora belbahrii symptoms on Ocimum (click on image to enlarge it)
Author(s): Bruce Watt, University of Maine
Source: IPM Images
Author(s): Bruce Watt, University of Maine
Source: IPM Images
Peronospora Corda 1837
This genus contains oomycetes causing a variety of downy mildew diseases, e.g. blue mold of tobacco or basil downy mildew. The genus is characterized by the equal branching (dichotomous) of the sporangiophores (also called conidiophores) where the branches are of similar size and the tips of the branches are pointed. The sporangia (also called conidia) are coloured and germinate directly on the leaf surface of the host plant.
Currently, the following species have been entered into the system:
