Powdery mildew is a common fungal disease of angiosperms and is so called because the mycelium of the fungus growing on the leaves, stems and flowers appears as a grayish white powdery coating. Powdery mildew is a disease separate and distinct from downy mildew. Although the signs of both diseases appear similar to the naked eye, powdery mildews are caused by fungi in the order Erysiphales while downy mildews are caused by fungi in the order Peronosporales.
 

Members of the order Erysiphales are considered obligate parasites of plants because they require a living host to survive. All attempts to grow them on artificial media have failed.

Methods of Host Infection

Environmental and Host Conditions That Promote Powdery Mildew

Measures for Controlling Powdery Mildew Disease

Key to the Genera of Powdery Mildew Fungi

Technique for Preparing Powdery Mildew Samples for Microscopic Identification

Glossary of Terms

Links

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