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Behemoth
Joined: 01 Dec 2004 Posts: 19023 Location: Leeds
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Hairyloon
Joined: 20 Nov 2008 Posts: 15425 Location: Today I are mostly being in Yorkshire.
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Behemoth
Joined: 01 Dec 2004 Posts: 19023 Location: Leeds
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Hairyloon
Joined: 20 Nov 2008 Posts: 15425 Location: Today I are mostly being in Yorkshire.
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Bodger
Joined: 23 May 2006 Posts: 13524
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Posted: Tue Jun 16, 15 5:06 pm Post subject: |
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I've just got this back from an enquiry with the forestry Commission.
TREE HEALTH DIAGNOSTIC & ADVISORY SERVICE
Hi John,
Further to our telephone call, I have attached our information sheet on honey fungus and our sampling guide for Phytophthora to give you an idea what you are looking for.
You need to peel back the bark with a chisel or knife where the lesions meet healthy tissue. If you find a white fungal sheet growing beneath the bark that will confirm honey fungus. On page 5 of the honey fungus guide the mycelium, or fungal tissue, is clearly evident beneath the bark of an affected tree. Should you confirm it, the best course of action is to remove the tree. If you wish to replace it, the list of less susceptible plants in the leaflet may be helpful. However, if there is no evidence of white mycelium and the plant tissue is just dead, Phytophthora might be the cause. This is a microscopic organism which will not be visible with the naked eye.
Unfortunately in the case of both these root pathogens, the prognosis for the tree is poor. Ideally you would remove the tree and if practicable, the large roots. However, this is often extremely difficult. Ultimately the key is to replant with species which are less susceptible, and if we can identify the organism involved, then it is possible to tailor replant choices. |
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dpack
Joined: 02 Jul 2005 Posts: 45505 Location: yes
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Mistress Rose
Joined: 21 Jul 2011 Posts: 15598
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Falstaff
Joined: 27 May 2009 Posts: 1014
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NorthernMonkeyGirl
Joined: 10 Apr 2011 Posts: 4590 Location: Peeping over your shoulder
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tahir
Joined: 28 Oct 2004 Posts: 45431 Location: Essex
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Posted: Thu Jun 18, 15 9:27 am Post subject: |
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The latest new pest to be confirmed here:
"A Forestry Commission spokesperson said:
“The oriental chestnut gall wasp has been discovered in one area of Kent.
“This is a pest that only affects sweet chestnut (Castanea) species of tree, and does not pose any risk to people, pets or farm livestock.
“We have launched an immediate investigation of the surrounding woodland and, once we have fully assessed the situation, we will swiftly take any appropriate action.”
Key facts:
· Oriental chestnut gall wasp is a pest that affects species of sweet chestnut tree. Only European sweet chestnut (Castanea sativa) is grown in significant numbers in Britain, and no other tree species in Britain is affected.
· The Forestry Commission is undertaking a full survey and analysis to determine the scale of the current outbreak and the potential cause of the outbreak.
· Once we have fully assessed the situation, we will swiftly take any appropriate action.
· Oriental chestnut gall wasp is a threat to sweet chestnuts in several regions of the world. It reduces nut production and can weaken the tree, leaving it vulnerable to other diseases.
· The UK has Protected Zone Status against this pest, and the plant health services must be notified of all pending imports of sweet chestnut planting material before its arrival in the UK so that a proportion can be inspected.
· As part of investigations into the outbreak, the new Observatree group of trained volunteers have agreed to help survey more widely for evidence of the pest.
A full statement has been published on our website at www.forestry.gov.uk/gallwasp, and will be updated as the situation evolves. The affected woodland is Farningham Woods, near Sevenoaks, Kent." |
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dpack
Joined: 02 Jul 2005 Posts: 45505 Location: yes
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sean Downsizer Moderator
Joined: 28 Oct 2004 Posts: 42207 Location: North Devon
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dpack
Joined: 02 Jul 2005 Posts: 45505 Location: yes
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Slim
Joined: 05 Mar 2006 Posts: 6540 Location: New England (In the US of A)
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dpack
Joined: 02 Jul 2005 Posts: 45505 Location: yes
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