Originally Posted by dogweed

I listened to Dr Joan Webber from the UK's Forest Research the other day. The bleeding cankers affecting horse chestnuts in the UK at present are mostly not Phytophera, but Pseudomonas syringae pathovars. Little is known about the pathology of the problem and I would suggest that rushing in and deep mulching, fertilising or pretty much anything else is not wise given how little is understood.

Whilst the prognosis is not good, Dr Webber has seen horse chestnuts infected arrest their decline and live.

It was suggested that if felling / pruning tools should be sterilised afterwards and care should be exercised in the disposal of arisings.