Diplocarpon earlianum (Ellis & Everh.) F.A. Wolf, (strawberry leaf scorch - causative organism)


5 Aug 2010 at OSGR: TQ07 in Surrey, England

Record Summaryepiphyllous back conidiomata of Marssonina state on red spots on leaves of Silverweed
Found asAnamorph
Date5 August 2010
Associated organismPotentilla anserina
OS grid refOSGR: TQ07
Lat/Lon51° 30’ N, 0° 30’ W
Vice CountySurrey, VC no: 17
CountryEngland
Voucher5 Aug 2010[B]
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Notes:

Leaf spots: epiphyllous and on underside of midrib, largely hidden below by leaf tomentum; red with dark purple centres, sometimes dead and grey in the centre with dark purple margins; leaf soon turning yellow and dying. Leaf spots with one to several pycnidia in centre, becoming more abundant as infection progresses.

Pycnidia: black, domed, fragile, developing white spore tendril.

Pycnidial shield: becoming almost invisible in lactophenol once the anthocyanin has diffused away.

Conidia: hyaline, curved-fusiform, 22-27/6-7µm, 1-septate with broader lower cell.

The following literature was used to identify this find:

standard photographs and close-ups
standard photographs and close-ups:
macro-photographs
macro-photographs:
photomicrographs
photomicrographs:

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