horse chesnut

[Alex Reid]

Hello all a little bit of help needed in identifying what a friend of mine suspects to be a possible disease in horse chesnuts,

 

symptoms are yellow spots on the leaves I do have a specimen which i will photograph and post on here this evening.

 

The reason for me posting is that al the tree in a local woodland that have these yelow spots on their leaves seem to have gone into decline with one having failed on the main stem completely,

 

In this location there is also a red squirrel population and could anyone tell me wether we would need to get an inspector in to identfy like you would do with bats for example.

 

Any help would be much appreciated

 

Regards

Alex Reid

[Arbgirl]

Horse chestnut leaf miner and/or Guignardia

 

Will find you the link to the other threads if I can

 

http://arbtalk.co.uk/forum/tree-health-care/18526-horse-chestnut-leaf-miner-bleeding-canker.html

 

http://arbtalk.co.uk/forum/general-chat/18544-horse-chestnut-trees-looking-rough.html?highlight=horse+chestnut

 

 

Here you go - these will tell you more

 

 

As for red squirrels - pass - try asking Natural England or the local wildlife trust

Edited July 27, 2010 by Arbgirl

[Alex Reid]

 

this is the leaf in question sorry for the fact it has dried up slightly, it has been in the car for a couple of days

[Alex Reid]

Horse chestnut leaf miner and/or Guignardia

 

Will find you the link to the other threads if I can

 

http://arbtalk.co.uk/forum/tree-health-care/18526-horse-chestnut-leaf-miner-bleeding-canker.html

 

http://arbtalk.co.uk/forum/general-chat/18544-horse-chestnut-trees-looking-rough.html?highlight=horse+chestnut

 

 

Here you go - these will tell you more

 

 

As for red squirrels - pass - try asking Natural England or the local wildlife trust

 

thankyou very much for that

[Paul Jenks]

There was a posting yesterday by Rupert Ellingham with his dissertation on just this subject.

[rupert]

The dead tissue on your leaf are the mines of the horse chestnut leaf miner larvae, while the shedding limbs in your local wood are most likely caused by horse chestnut bleeding canker.

[Ben90]

while the shedding limbs in your local wood are most likely caused by horse chestnut bleeding canker.

 

As well as the dry spring we've had causing summer branch drop?

[Alex Reid]

thanks for that gang is this a problem affecting most of the uk and is there anything that can be done to stop it?

 

regards

a

[rupert]

As well as the dry spring we've had causing summer branch drop?

 

Yes, the particularly weak horse chestnut branches become even more brittle and susceptible to sudden fracture and drop as the infected dead wood dries out.

[rupert]

thanks for that gang is this a problem affecting most of the uk and is there anything that can be done to stop it?

 

regards

a

 

Fallen leaves can be removed and destroyed to prevent the pupae over-wintering. And a variety of chemical insecticides, including diflubenzuron, imidacloprid and abamectin, are effective in controlling the leaf miner and preventing leaf damage. Systemic insecticides are best applied as root drenches or injected into the stem cambium or soil. Alternatively, Allicin/Conquer injected into the stem cambium like a systemic insecticide is also proving to be successful.