- Erysiphe cichoracearum - Many photographs and enlarged images of this powdery mildew, parasitic on the plant family Cruciferae.
- Microsphaera alni - Microscopic image of a section of a cleistothecium.
- Order: Erysiphales (Powdery Mildews) - A profile of the powdery mildews which are obligate parasites of flowering plants, with enlarged images of the conidiophores and conidium and some asci.
- Powdery Mildew - Photographs and information on Blumeria graminis which can cause serious damage to oats, barley, rye and wheat.
- Powdery Mildew of Grass - Erysiphe graminis is an epiparasite on grass blades. This and other mildews are a very successful group of fungal parasites that attack numerous plants. Photographs and information.
- Sphaerotheca spiraeae - Photograph and information on this powdery mildew affecting a plant of Meadowsweet, Filipendula ulmaria.
- Uncinula necator - Scanning electron microscope images showing tissues infected with this pathogen before and after treatment with a fungicide.
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