BioImages (UK)
BIOTA
(living things)
Eukaryota
(eukaryotes)
MYCETEAE
(fungi, moulds and lichens)
ASCOMYCOTA
(spore-shooters)
ASCOMYCETES
(spore shooters)
DOTHIDEOMYCETIDAE
(a subclass of ascomycetes)
MYCOSPHAERELLACEAE
(a family of ascomycetes and lichens)
Cercospora
(a genus of dematiaceous anamorphic fungi)
Cercospora armoraciae
(a dematiaceous anamorphic fungus)
Record
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BioImages: The Virtual Field-Guide (UK)

Cercospora armoraciae Sacc., 1876 (a dematiaceous anamorphic fungus)

Date: 14 October 2007
Location: Berks, England
Voucher: 14/10/2007[B]
(Please quote this in any queries about this record)
State: Imperfect stage
Record Summary: Numerous, coalescing leaf spots devastating Horse-Radish leaves
Associated organism: on live leaf of Armoracia rusticana
Identification Notes: Numerous leaf spots up to 8mm diameter, confluent and covering most of the older leaves and lower half of many younger leaves.

Spots very variable. Upper surface: charcoal grey, sometimes in concentric rings; buff in centre of older spots which sometimes drops out; some spots with white or pale yellow fibrous encrustation (massed conidia), a few spots pale with black borders. Some spots on leaf upper margin black and sclerotial.

Lower surface similar, more dingey.

Conidiophores: pale sepia walled, sinuate with conidium scars near apex.

Conidia: hyaline, very narrowly obclavate, multi-septate, 65-134/3-5 µm.

Images etc

magnified photograph Infected leaf - bottom half - lower surface 351 by 500 pixels
magnified photograph Infected leaf - bottom half - upper surface 363 by 500 pixels
naked eye photograph Infected leaf - in situ 333 by 500 pixels
naked eye photograph Infected leaf - lower surface - close-up 500 by 333 pixels
magnified photograph Infected leaf - lower surface 500 by 216 pixels
magnified photograph Infected leaf - top half - lower surface 356 by 500 pixels
magnified photograph Infected leaf - top half - upper surface 351 by 500 pixels
naked eye photograph Infected leaf - upper surface - close-up 500 by 333 pixels
naked eye photograph Infected leaf - upper surface - close-up 500 by 333 pixels
naked eye photograph Infected leaf - upper surface - close-up 500 by 392 pixels
magnified photograph Infected leaf - upper surface 500 by 211 pixels
naked eye photograph Infected leaf portion - in situ 379 by 500 pixels
naked eye photograph Infected leaves - in situ 500 by 333 pixels
naked eye photograph Infected leaves - in situ 500 by 333 pixels
naked eye photograph Infected leaves - in situ 333 by 500 pixels
naked eye photograph Infected leaves - in situ 431 by 500 pixels
naked eye photograph Infected leaves - in situ 500 by 333 pixels
naked eye photograph Infected leaves 500 by 374 pixels
magnified photograph Leaf spot - leaf upper surface - highly enlarged 500 by 333 pixels
magnified photograph Leaf spot - on leaf lower surface - magnified 500 by 333 pixels
magnified photograph Leaf spot - on leaf lower surface - magnified 500 by 399 pixels
magnified photograph Leaf spot - on leaf upper surface - magnified 500 by 333 pixels
magnified photograph Leaf spot - on leaf upper surface - magnified 500 by 333 pixels
magnified photograph Leaf spot - on leaf upper surface - magnified 500 by 421 pixels
naked eye photograph Leaf spots - fresh - on leaf upper surface - close-up - enlarged 500 by 333 pixels
magnified photograph Leaf spots - leaf upper surface - highly enlarged 500 by 333 pixels
magnified photograph Leaf spots - leaf upper surface - highly enlarged 500 by 333 pixels
naked eye photograph Leaf spots - old - on leaf upper surface - close-up - enlarged 500 by 333 pixels
naked eye photograph Leaf spots - on leaf lower surface - close-up - enlarged Good 500 by 333 pixels
naked eye photograph Leaf spots - on leaf lower surface - close-up - enlarged 500 by 333 pixels
microscope photograph Conidia - magnified 500 by 321 pixels
microscope photograph Conidia - magnified 500 by 251 pixels
microscope photograph Conidia - magnified 500 by 220 pixels
microscope photograph Conidia and conidiophores - magnified 500 by 498 pixels
microscope photograph Conidia and conidiophores - magnified 500 by 397 pixels
microscope photograph Conidiophores - magnified 500 by 285 pixels
microscope photograph Conidiophores - magnified 500 by 411 pixels

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