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Guignardia aesculi
Horse-chestnut leaf blight
Description
Spots on leaves caused by this fungus regularly appear in summer. The pest is characterized by yellowing and later browning of leaves from their edges. The disease also occurs with horse chestnut leaf miner, which is much more damaging that the fungal disease attracting less attention. This disease is significant especially in forest nurseries where it reduces the assimilation surface and general vitality of seedlings and young trees, and mainly in parks where it lowers their aesthetic value.
Symptom
Yellowing and later browning of leaves from their edges.
Tree Species: Horse Chestnut
Part of a plant- attacked: Leaf / Needle
Pest significance: Harmful
Pest Category: Fungi
Invasive Species: No
Present in EU: Yes
Add comment: Guignardia aesculi
Location map: Guignardia aesculi
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Last observations
There are a total of 11 observations of the species in the system
Guignardia aesculiHorse-chestnut leaf blight
miso
Number of votes: 0
Published: 16.7.2025
Guignardia aesculiHorse-chestnut leaf blight
AK73
Number of votes: 0
Published: 2.8.2024
Guignardia aesculiHorse-chestnut leaf blight
AK73
Number of votes: 0
Published: 2.8.2024
Guignardia aesculiHorse-chestnut leaf blight
AK73
Number of votes: 0
Published: 2.8.2024
Guignardia aesculiHorse-chestnut leaf blight
AK73
Number of votes: 0
Published: 2.8.2024
Similar damage
Oak flea beetle
Powdery mildew Erysiphe flexuosa
Horse-chestnut leaf miner
