Leaf Diseases of Hardwoods
Powdery mildew with the white mycelium covering the surface of the leaves.
Powdery mildew on leaf surfaces produce large numbers of conidia.
Illustration of conidia produced on leaf surface. Conidia, conidiophores and haustoria are shown.
Cleistothecia (also called Chasmothecia) observed in the class lab:
Cleistothecia with one acus. Note end of appendage with ornamentation. Podosphaera.
Cleistothecia with many asci and appendages with ornamentation. Microsphaera
Cleistothecia - appendages with bulbous base. Phyllactinia
Another view of Phyllactinia from the oak leaf taken during the lab by Kara
Cleistothecia - appendages with curled ends. Uncinula
A drawing from the 1800's showing a few different types of appendages on cleistothecia