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

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Podosphaera aphanis (Wallr.) U. Braun & S. Takam., Schlechtendalia 4 26 (2000)
Podosphaera aphanis (Wallr.) U. Braun & S. Takam. 2000

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Exotic
Present
New Zealand
Political Region

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(Wallr.) U. Braun & S. Takam.
Wallr.
U. Braun & S. Takam.
2000
26
ICN
species
Podosphaera aphanis

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aphanis

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Although powdery mildew frequently occurs on strawberries, it is troublesome only in the south part of the North Island and the South Island. Brien and Dingley (1955) recorded this species as Sphaerotheca pannosa on Rubus squarrosus. It frequently occurs on the three endemic species of Rubus.
Type: Powdery Mildews; Description: Mycelium superficial, evanescent, occasionally dense, white, hyphae 3–5 μm wide; on leaves. Appressoria not lobed. Ascomata not known in New Zealand. Conidiophores 250–350 × 7–13 μm, foot cell straight or tapering towards the base. Conidia produced in moderately long or long chains, oval, 0-septate, 26–33 × 16–22 μm, smooth, hyaline.
Distribution: Northland, Auckland, Coromandel, Bay of Plenty, Taupo, Wellington, Nelson, Mid Canterbury, Otago Lakes, Southland.; 1st Record: Cunningham (1922: as Sphaerotheca humuli).
Significance: This fungus has been recorded under a number of different names. Dingley (1969) reported it under the name Sphaerotheca macularis (Fries) Jaczewski as the cause of a troublesome powdery mildew on strawberry. Boesewinkel (1980, 1981a) recorded it on a number of Eucalyptus species as S. alchemillae (Greville) Junell. It is the most common of three powdery mildew fungi found on Eucalyptus spp. (The other two are Erysiphe orontii and S. pannosa.) As it is not possible to differentiate these fungi in the field, records generally refer to ‘powdery mildew’ rather than to individual species. Powdery mildew can be a serious problem in glasshouse-grown Eucalyptus seedlings, severe infection causing necrosis of young leaves and shoots. Sphaerotheca aphanis observed in nursery seedlings has been found to persist under field conditions (I.A.Hood, New Zealand Forest Research Institute, pers. comm.).; Host(s): Eucalyptus albens, E. cinerea, E. crebra, E. diversicolor, E. diversifolia, E. grossa, E. megacarpa, E. nitens, E. nutans, E. paniculata, E. tereticornis, E. torquata, Rubus australis, R. cissoides.

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Erysiphe alchemillae Grev. 1824
Podosphaera aphanis (Wallr.) U. Braun & S. Takam. 2000
Oidium fragariae Harz
Podosphaera aphanis (Wallr.) U. Braun & S. Takam. 2000
Oidium ruborum Rabenh.
Podosphaera aphanis (Wallr.) U. Braun & S. Takam. 2000
Podosphaera aphanis (Wallr.) U. Braun & S. Takam. 2000
Podosphaera aphanis (Wallr.) U. Braun & S. Takam. 2000
Podosphaera aphanis (Wallr.) U. Braun & S. Takam. 2000
Podosphaera aphanis (Wallr.) U. Braun & S. Takam.
Podosphaera aphanis (Wallr.) U. Braun & S. Takam. 2000
Podosphaera aphanis (Wallr.) U. Braun & S. Takam.
Podosphaera aphanis (Wallr.) U. Braun & S. Takam. 2000
Sphaerotheca alchemillae (Grev.) L. Junell 1965
Podosphaera aphanis (Wallr.) U. Braun & S. Takam. 2000
Sphaerotheca alchemillae (Grev.) L. Junell (1965)
Sphaerotheca aphanis (Wallr.) U. Braun 1982
Podosphaera aphanis (Wallr.) U. Braun & S. Takam. 2000
Sphaerotheca aphanis (Wallr.) U. Braun (1982)
Sphaerotheca aphanis (Wallr.) U. Braun var. aphanis (1982)
Sphaerotheca aphanis (Wallr.) U. Braun 1982 var. aphanis
Podosphaera aphanis (Wallr.) U. Braun & S. Takam. 2000
Sphaerotheca aphanis (Wallr.) U. Braun 1982 var. aphanis

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1b6eec34-0e3c-42db-b7ec-93c1e564cbf4
scientific name
Names_Fungi
27 January 2012
6 May 2013
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