Diseases

Horse Chestnut Trees

These trees are really suffering at the moment! The problems of Leaf Minor and Bleeding cankers are very evident. Here is a brief review of the problem.

Leaf minor damage

The Leaf minor problem causing early leaf fall as leaf tissue is destroyed by the minor larva has existed since 2002 when it spread across London from its source in Wimbledon. There is often no action required to the actual tree beyond collecting and burning the fallen leaves to minimise the number of over wintering pupae.

Bleeding Canker has become a real problem since 2005 the pathogen is believed to be pseudomonas and phytophthora that cause bleeding lesions on the trunk and branches. These ooze liquid often of a dark colour which can then become the location for larger fruiting bodies and continue with bark separation. The Chestnut trees can recover from this if callus develop over the wounds, where the cankers are widespread then these branches may need to be removed to avoid problems of fracturing and failure.

Bleeding Canker

If you have Horse Chestnut trees in your garden keep an eye on them, seek our professional advise if you are concerned.