News from Forest Research: October 2006
UK horse chestnuts are currently suffering increased levels of attack from the Horse Chestnut Leaf Miner, Cameraria ohridella, and from a fungal pathogen causing stem bleeding, commonly known as bleeding canker.
Horse Chestnut Leaf Miner
Causes leaf damage, as the larvae of Cameraria ohridella mine within the horse chestnut leaves. Severely damaged leaves shrivel and turn brown by late summer and fall early, well before normal leaf fall in the autumn.
Horse Chestnut Bleeding Canker
Produces symptoms which include bleeding areas on the stems and sometimes on scaffold branches.