Podosphaera macularis

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Podosphaera macularis symptoms on hop (click on image to enlarge it)
Author(s): David Gent, USDA Agricultural Research Service
Source: IPM Images

Podosphaera macularis (Wallr.) U. Braun & S. Takam. 2000

The fungus causes powdery mildew of hop. The quality and also the quantity of the hop cones, the harvested product, is greatly affected by the disease. The conidiophores are non-branching and the conidia barrel-shaped.

Podosphaera macularis f. sp. fragariae - see Podosphaera aphanis.

Synonyms:
Podosphaera humuli
Sphaerotheca humuli
Sphaerotheca macularis