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Forensic Key and Diagrams to the Genera of Powdery Mildew Fungi

Diagrams Genera of Powdery Mildew

(Drawing courtesy of C.B. Kenaga, E.B. Williams, and R.J. Green)

Key to the Genera of Powdery Mildew

Appendages coiled or hooked at tip - Uncinula
Appendages simple and straight with bulb-like base - Phyllactinia
Appendages branching dichotomously (antler-like at tip)
    Cleistothecium contains a single ascus - Podosphaera
    Cleistothecium contains several asci - Microsphaera
Appendages simple or irregularly branched, often entangled
    Cleistothecium contains a single ascus - Sphaerotheca
    Cleistothecium contains several asci - Erysiphe