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BIOTA
(living things)
Eukaryota
(eukaryotes)
MYCETEAE
(fungi, moulds and lichens)
ASCOMYCOTA
(spore-shooters)
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(spore shooters)
DOTHIDEOMYCETIDAE
(a subclass of ascomycetes)
MYCOSPHAERELLACEAE
(a family of ascomycetes and lichens)
Cymadothea trifolii
(Black Blotch Or Sooty Blotch Disease Of Clovers - Causative Organism)
Record
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BioImages: The Virtual Field-Guide (UK)

Cymadothea trifolii (Pers.) F.A. Wolf, 1935 (Black Blotch Or Sooty Blotch Disease Of Clovers - Causative Organism)

Date: 2 August 2007
Location: Berks, England
Voucher: 02/08/2007[B]
(Please quote this in any queries about this record)
State: Infection
Record Summary: Polythrincium anamorph on underside of leaflets of White Clover
Associated organism: on underside live, yellow spotted or yellowed leaflet of Trifolium repens
Identification Notes: Leaf lamina upper surface with small yellow spots with diffuse borders and grey centres. As they age the tissue dies to form a depressed grey spot.

Lamina lower surface with rough, spherical black colonies arranged in clusters on the leaf spots, eventually covering most of leaf. Infection evenly distributed over whole leaflet.

Petiole unaffected, but lamina eventually turning yellow and dying.

Conidia: grey, smooth, thin-walled, 1-septate, amygdaliform, 16.5-20.5/10-13µm.

Conidiophores: grey, sinuous, 5µm diam, arising from swollen 10µm diam base with septum below.

Images etc

magnified photograph Infected leaf - top and under surfaces - white background 500 by 491 pixels
magnified photograph Infected leaves - on white background 500 by 360 pixels
magnified photograph Infected leaves - top surfaces - white background 500 by 364 pixels
magnified photograph Infected leaves - top surfaces - white background 500 by 334 pixels
magnified photograph Infected leaves - under and top surfaces - white background 500 by 253 pixels
magnified photograph Infected leaves - under surfaces - white background 500 by 278 pixels
magnified photograph Infected leaves - under surfaces - white background 500 by 340 pixels
magnified photograph Infection - magnified 500 by 333 pixels
magnified photograph Infection - magnified 500 by 333 pixels
magnified photograph Infection - magnified 500 by 333 pixels
magnified photograph Infection - magnified 500 by 333 pixels
magnified photograph Infection - magnified 500 by 385 pixels
magnified photograph Infection - magnified 500 by 451 pixels
microscope photograph Conidia - magnified 54 Kb 465 by 419 pixels
microscope photograph Conidia - magnified 500 by 425 pixels
microscope photograph Conidia and conidiophores - magnified 500 by 333 pixels
microscope photograph Conidia and conidiophores - magnified 500 by 333 pixels
microscope photograph Conidia and conidiophores - magnified 500 by 403 pixels
microscope photograph Conidia and conidiophores - magnified 395 by 500 pixels
microscope photograph Conidiophores - magnified 500 by 415 pixels

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