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David Humphries

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Everything posted by David Humphries

  1. David Humphries
    Looks like Ganoderma sp. The leaf miners (I'm guessing you're on about Cameraria ohridella) will have 'an' effect on the health of the tree, as the tree will struggle to photosynthesise enough due to the reduced leaf efficiency. This can reduce flower production, seed/conker formation and its ability to fight off infections like bleeding canker, Xylella etc..........all of these will result in low vitality which can lead to pathnogenic fungi 'avin a go ! .
  2. David Humphries
    Volvariella bombycina - Silky Rosegill - David Humphries’s Fungi Directory - Arbtalk.co.uk | Discussion Forum for Arborists .
  3. David Humphries
    Saw that. Thought it was quite good. Sharon came over really well. But left me thinking that there really is so little in the media regarding the positive side of tree management. .
  4. David Humphries
    Was it windy over the weekend in your neck of the woods, or just Saturday's rain? .
  5. David Humphries
    All the above Paul, plus more. Will be interesting to read the official investigation. There must be hundreds of Planes like this in Urban areas. Usually a robust tree species, Massaria, Anthracnose, Ceratocystis and general urban stress like compaction, root severance and drought will be a significant ongoing threat to London Planes vitality and stability over the coming years. .
  6. David Humphries
    this one has already surfaced on UKTC but I thought it worth sharing for those not following there or not from the South East. Hearne Hill, South London Fell mid day, apparently no discernible wind (or roots for that matter !) No injuries and little damage considering the size of it. Huge tree crashes through window after collapsing on house in leafy south London neighbourhood - London - News - London Evening Standard .
  7. David Humphries
    Absolutely, 50% of the time we end up looking like professionals who know what we're doing .
  8. David Humphries
    usually comes down to a toss of a coin mate .
  9. David Humphries
    Resistograph readings taken at 25cm height at cardinal points. The dbh = 1080mm taken at 1.5m Readings suggest that the tree is coping with the associated heart wood decay & has a sound residual wall of between 24 & 36cm. The sound wood is well over a third of the radius of the tree, not even taking into consideration that it has had a significant reduction in the past. We shall continue to monitor......... .
  10. David Humphries
    Horse chestnut hosting the brown rot of R. ulmarius .
  11. David Humphries
    Nice tear out wound, gives the tree great character. Not so sure it's panic fruiting. Long term past, present and ongoing colinisation I'd think. .
  12. David Humphries
    Not a good prognosis I'd imagine Kev, coming out? .
  13. David Humphries
    Lots .
  14. David Humphries
    English Heritage Estate Kenwood .
  15. David Humphries
    F. fomentarius on birch in London Trunk appears to be left standing as a monolith for its biodiversity value. .
  16. David Humphries
    sorry Gary, up to my eyeballs in OPM currently. You've probably found the LTOA borough contact list on the website, yes? rather than e-mail the borough TO's individually, send an e-mail to the Exec Officer who should then be able to send it around all 170 contacts. I'll pm you the exec's e-mail address. .
  17. David Humphries
    Recent failure, attributable to the brown rot of Laetiporus. Full(ish) crown, thin residual wall Fantastic habitat tree .
  18. David Humphries
    Polyporus squamosus on the roots of a gorse .
  19. David Humphries
    Good share Kevin, thanks .
  20. David Humphries
    Hello Cassian You probably know P. robustus is realtive rare here in the UK. So not a lot known about the associated decay and probably (as you suggest) few examples of associated failure. Do you find it hosted on Quercus as well as the gums that you list? Here its predominantly on oak but also noted on beech, ash, elm & sweet chestnut .
  21. David Humphries
    Thanks Cassian if you get the chance I'd like to see what species you're encountering down under on and around trees? .
  22. David Humphries
    Cheers Jaime I'm aware of the AA Journal piece he did in 2012 - Shade and daylight loss to dwellings are you talking about something else? .
  23. David Humphries
    Perhaps the context varies depending on situation & space. the horse & sheep shots at the beginning of this thread were taken on top of a mountain plateau in the Basque region of Spain. In that environment the wood pasture doesn't seem to suffer as there appears to be plenty of room for man, tree and beast. Urban & rural UK is for sure a crowded place. .
  24. David Humphries
    I follow everything Jules, kinda my job here Thought about posting it on that thread when I saw your post about the shade but also thought about this thread whilst listening to Frederic. Its a fascinating aspect of any debate about trees and their presence around humans .
  25. David Humphries
    Something struck a chord a couple of weeks ago whilst listening to Frederic Segur present on urban tree management in France at the Barchams Big Barn Conference. 15000 people perished in France during the two months of heatwave during 2003. The majority of these fatalities (infants and the elderly) were in urban centres. Undoubtedly the number would have been significantly reduced had there been larger canopy trees in the towns and cities helping to cool the heat island effect. .

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