Horse Chestnuts under attack

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.

Leaf mines of Cameraria ohridella on horse chestnut

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.

Bleeding canker

Horse Chestnut Bleeding Canker

Produces symptoms which include bleeding areas on the stems and sometimes on scaffold branches.

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