The first is bleeding canker: bacteria infects the bark, cutting off the water supply to the crown. Cryphonectria parasitica is a parasitic fungus of chestnut trees. What damage does it do? The current disease in horse-chestnuts is caused by a bacterium called Pseudomonas syringae pv aesculi. To put it simply it clogs up the tree's veins. Horse chestnut trees in Ireland are threatened by a new parasite which has killed 50,000 trees in the UK. Laboratory studies suggest that the compound in horse chestnut known as aescin, or escin, has anti-inflammatory (1) , neuroprotective (1) , and antitumor (2) (3) effects, and enhances the efficacy of gemcitabine (18) . These cankers ooze, or bleed, dark fluid. It is characterised by the appearance of 'bleeding cankers', or lesions, on the stems (trunks) and branches. This disease came to be known as chestnut blight.Naturally found in South East Asia, accidental introductions led to invasive populations of C. parasitica in North America and Europe. Many different organisms cause symptoms called bleeding canker in trees. People with kidney or liver disease and bleeding disorders should avoid horse chestnut. Horse chestnut: Other pests and pathogens Common pests and pathogens affecting horse chestnut. Inflammation can cause excess fluid buildup in your tissues, which can lead to fluid retention and swelling ().Aescin is a component in horse chestnut … Guignardia blotch is a foliage disease of many Aesculus species, including California, Ohio, red, and yellow buckeye and common, red, and Japanese horse chestnuts. Horse chestnut should not be confused with sweet chestnut. The horse chestnut can live up to 300 years, provided it does not become infected with one of the many fungal diseases and other health conditions to which the horse chestnut is susceptible. Before using horse chestnut, talk to your healthcare provider. The fungal disease has had a devastating economic and social impact on communities in the eastern United States. These exhibit black tarry bleeding areas which may girdle the entire tree and this eventually kill it. Bleeding canker is killing horse chestnuts in significant numbers in Ireland. Overview. Horse chestnut has been used in alternative medicine and is likely effective in treating some symptoms of chronic venous insufficiency (decreased … You may not be able to use horse chestnut if you have certain medical conditions, such as: a bleeding or blood clotting disorder (horse chestnut can thin your blood); diabetes (horse chestnut may cause low blood sugar); kidney disease; liver disease; a stomach or intestinal disorder; Horse chestnut trees (Aesculus hippocastanum) are susceptible to several well-known pests and pathogens that cause symptoms other than bleeding canker.Guignardia leaf blotch. Caused by the fungus Guignardia aesculi, the disease produces reddish or dull brown, irregular blotches that are … Horse Chestnut Bleeding Canker is a disease which affects major branches and stems. These include bleeding canker, which can cause their death; Guignardia leaf blotch; and horse chestnut scale insect. 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