Guignardia aesculi (Peck) V.B. Stewart
(Horse Chestnut Leaf Blotch - causative organism)

Interactions where Guignardia aesculi is the dominant partner and gains from the process

The following relationships have been collated from the published literature (see 'Interaction References').

Stage Summary Taxon Vernacular Classification References Darwin Classification of Active Taxon Active Taxon Active Vernacular Active Taxon Uncertain Active State Active Part Active Stage Relationship Relationship Uncertain Relationship Geography Darwin Classification of Passive Taxon Passive Taxon Passive Vernacular Passive Taxon Uncertain Passive State Passive Part Passive Stage Passive Taxon's significance to Active Taxon Indoors etc Season
Phyllosticta coelomycetous anamorph (epiphyllous, scattered or crowded) epiphyllous, scattered or crowded pycnidium of Phyllosticta coelomycetous anamorph causes spots on live leaf UK/Ireland Aesculus horse chestnuts Sapindales: Sapindaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
/Fungi/Ascomycota/Dothideomycetes/Botryosphaeriales/Phyllostictaceae/Guignardia aesculi/Guignardia aesculihorse chestnut leaf blotch - causative organismepiphyllous, scattered or crowdedpycnidiumPhyllosticta coelomycetous anamorph Foodplant / spot causerUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Sapindales/Sapindaceae/Aesculus/Aesculushorse chestnutsliveleaf
pseudothecium pseudothecium is saprobic on dead, fallen, over-wintered leaf Aesculus horse chestnuts Sapindales: Sapindaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
/Fungi/Ascomycota/Dothideomycetes/Botryosphaeriales/Phyllostictaceae/Guignardia aesculi/Guignardia aesculihorse chestnut leaf blotch - causative organismpseudothecium Foodplant / saprobe /Plantae/Tracheophyta/Magnoliopsida/Sapindales/Sapindaceae/Aesculus/Aesculushorse chestnutsdead, fallen, over-winteredleaf (5)
Phyllosticta coelomycetous anamorph (epiphyllous, scattered or crowded) epiphyllous, scattered or crowded pycnidium of Phyllosticta coelomycetous anamorph causes spots on live leaf Aesculus glabra Sapindales: Sapindaceae Guignardia leaf blotch of Horsechestnut, Hudson, H.J., 1987
/Fungi/Ascomycota/Dothideomycetes/Botryosphaeriales/Phyllostictaceae/Guignardia aesculi/Guignardia aesculihorse chestnut leaf blotch - causative organismepiphyllous, scattered or crowdedpycnidiumPhyllosticta coelomycetous anamorph Foodplant / spot causer /Plantae/Tracheophyta/Magnoliopsida/Sapindales/Sapindaceae/Aesculus glabra/Aesculus glabraliveleaf (7-)
pseudothecium pseudothecium is saprobic on dead, fallen, over-wintered leaf Aesculus glabra Sapindales: Sapindaceae Guignardia leaf blotch of Horsechestnut, Hudson, H.J., 1987
/Fungi/Ascomycota/Dothideomycetes/Botryosphaeriales/Phyllostictaceae/Guignardia aesculi/Guignardia aesculihorse chestnut leaf blotch - causative organismpseudothecium Foodplant / saprobe /Plantae/Tracheophyta/Magnoliopsida/Sapindales/Sapindaceae/Aesculus glabra/Aesculus glabradead, fallen, over-winteredleaf (5)
Phyllosticta coelomycetous anamorph (epiphyllous, scattered or crowded) epiphyllous, scattered or crowded pycnidium of Phyllosticta coelomycetous anamorph causes spots on live leaf UK/IrelandMajor Aesculus hippocastanum Horse Chestnut, Horse-chestnut Sapindales: Sapindaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
Guignardia leaf blotch of Horsechestnut, Hudson, H.J., 1987
/Fungi/Ascomycota/Dothideomycetes/Botryosphaeriales/Phyllostictaceae/Guignardia aesculi/Guignardia aesculihorse chestnut leaf blotch - causative organismepiphyllous, scattered or crowdedpycnidiumPhyllosticta coelomycetous anamorph Foodplant / spot causerUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Sapindales/Sapindaceae/Aesculus hippocastanum/Aesculus hippocastanumhorse chestnut, horse-chestnutliveleafMajor (7-)
pseudothecium pseudothecium is saprobic on dead, fallen, over-wintered leaf UK/IrelandMajor Aesculus hippocastanum Horse Chestnut, Horse-chestnut Sapindales: Sapindaceae Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
Guignardia leaf blotch of Horsechestnut, Hudson, H.J., 1987
/Fungi/Ascomycota/Dothideomycetes/Botryosphaeriales/Phyllostictaceae/Guignardia aesculi/Guignardia aesculihorse chestnut leaf blotch - causative organismpseudothecium Foodplant / saprobeUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Sapindales/Sapindaceae/Aesculus hippocastanum/Aesculus hippocastanumhorse chestnut, horse-chestnutdead, fallen, over-winteredleafMajor (5)
Phyllosticta coelomycetous anamorph (epiphyllous, scattered or crowded) epiphyllous, scattered or crowded pycnidium of Phyllosticta coelomycetous anamorph causes spots on live leaf UK/Ireland Aesculus parviflora Bottlebrush Buckeye, Red Buckeye Sapindales: Sapindaceae British Stem- and Leaf- Fungi: Coelomycetes Vol. I … Sphaeropsidales with hyaline conidia, Grove, W.B., 1935
Guignardia leaf blotch of Horsechestnut, Hudson, H.J., 1987
/Fungi/Ascomycota/Dothideomycetes/Botryosphaeriales/Phyllostictaceae/Guignardia aesculi/Guignardia aesculihorse chestnut leaf blotch - causative organismepiphyllous, scattered or crowdedpycnidiumPhyllosticta coelomycetous anamorph Foodplant / spot causerUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Sapindales/Sapindaceae/Aesculus parviflora/Aesculus parviflorabottlebrush buckeye, red buckeyeliveleaf (7-)
pseudothecium pseudothecium is saprobic on dead, fallen, over-wintered leaf Aesculus parviflora Bottlebrush Buckeye, Red Buckeye Sapindales: Sapindaceae Guignardia leaf blotch of Horsechestnut, Hudson, H.J., 1987
/Fungi/Ascomycota/Dothideomycetes/Botryosphaeriales/Phyllostictaceae/Guignardia aesculi/Guignardia aesculihorse chestnut leaf blotch - causative organismpseudothecium Foodplant / saprobe /Plantae/Tracheophyta/Magnoliopsida/Sapindales/Sapindaceae/Aesculus parviflora/Aesculus parviflorabottlebrush buckeye, red buckeyedead, fallen, over-winteredleaf (5)

Author & YearTitleSource
Buczacki, S. & Harris, K., 1998Pests, Diseases & Disorders of Garden PlantsCollins Photoguide, 2nd edition edition, Collins
Ellis, M.B. & J.P., 1997Microfungi on Land Plants: An Identification Handbook2nd (New Enlarged) edition, 868pp, The Richmond Publishing Co. Ltd
Grove, W.B., 1935British Stem- and Leaf- Fungi: Coelomycetes Vol. I … Sphaeropsidales with hyaline conidiaVol I, 488pp, Cambridge University Press
Hudson, H.J., 1987Guignardia leaf blotch of HorsechestnutTBMS Vol 89 (3): 400-401.

Guignardia aesculi (Horse Chestnut Leaf Blotch - causative organism) may also be included in 'feeds on' relations listed under the following higher taxa:

Guignardia aesculi (Horse Chestnut Leaf Blotch - causative organism) may be included in 'fed on by' relations listed under the following higher taxa:

Taxonomic hierarchy:
SpeciesGuignardia aesculi (Horse Chestnut Leaf Blotch - causative organism)
GenusGuignardia (a genus of ascomycete fungi)
FamilyPHYLLOSTICTACEAE (a family of fungi)
OrderBOTRYOSPHAERIALES (an order of ascomycetes)
ClassDOTHIDEOMYCETES (a class of ascomycetes)
SubphylumPEZIZOMYCOTINA (a subphylum of ascomycetes)
PhylumASCOMYCOTA (spore shooters, ascomycete)
KingdomFUNGI (true fungi)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)
NBNNBN (data.nbn.org.uk) has a distribution map for Guignardia aesculi (Horse Chestnut Leaf Blotch - causative organism)

Identification Works

Handling & MagnificationAuthorYearTitleSource
Forest Research 2007 Path News Issue 15: October 2007
Forest Research 2004 Path News Issue 8: July 2004
Hudson, H.J. 1987 Guignardia leaf blotch of Horsechestnut TBMS Vol 89 (3): 400-401.
Punithalingam, E. 1993 Guignardia aesculi I.M.I. Descriptions of Pathogenic Fungi and Bacteria CMI Descriptions of Pathenogenic Fungi and Bacteria Sheet 1165.

Guignardia aesculi (Horse Chestnut Leaf Blotch - causative organism) may also be included in identification literature listed under the following higher taxa:

Literature listed under the following higher taxa may be relevant to Guignardia aesculi (Horse Chestnut Leaf Blotch - causative organism):

BioImagesBioImages (www.bioimages.org.uk) has 67 images of Guignardia aesculi (Horse Chestnut Leaf Blotch - causative organism)
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