Bacterial bleeding canker

Bacterial bleeding canker caused by the bacterial pathogen Pseudomonas syringae pv aesculi has become a serious and widespread problem of horse chestnut trees (Aesculus hippocastanum L.) in the UK. Depending on tree health, cultural practices and weather conditions, damage can range from complete recovery to tree death. The disease is more severe on trees suffering from insect attack and/or environmental stress such as drought or waterlogging.