Pests and Diseases

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Ash Dieback - Chalara fraxinea

For information on this disease and what to look for go to the Forestry Commission website. There has been no sign so far of this disease near Fovant but we need to keep a look out.

Oak leaf galls

Leaf galls have been seen on local oak trees. They appear on the underside of the leaves in early autumn and can be abundant and noticeable, but are not usually physically damaging.

Most gall-makers on oaks are native and naturally occur in the landscape, and are not regulatory/quarantine pests.

More information.

Horse Chestnut Leaf Miner

Many trees locally have leaf miner. It 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.

Despite the poor appearance of horse chestnut trees infested with C. ohridella, there is no evidence that damage by the moth leads to a decline in tree health, the development of dieback, or tree death. Trees survive repeated infestations and re-flush normally in the following year.

It appears that most of the damage caused by the moth occurs too late in the growing season to greatly affect tree performance. Consequently, there is no reason to fell and remove trees just because they are attacked by C. ohridella.

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Horse Chestnut photographed on 21 July 2011.

This local Horse Chestnut tree was adopted for a Sylva Foundation tree watch survey into the problem of Leaf Miner in 2010.

Information is being observed and recorded on various types of trees adopted by volunteers all over the country focusing on tree growth and health.

In May 2012 it was noted that this tree also has bleeding canker but so far it is surviving.

See also Horse Chestnuts near East Farm.

Honey Fungus

The Poplar tree below was outside Clays Orchard Residential Home. It appeared to have honey fungus and was reported to the Manager of Clays Orchard on 9 October 2012. A tree surgeon was asked to visit on 2 November. A cluster of pale-stemmed toadstools about 6" tall were found at the base of the tree with honey-coloured caps about 2" to 3" across which had disintegrated into a slimy black mess. The tree was removed but unfortunately the stump remains.

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