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David Humphries

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Everything posted by David Humphries

  1. David Humphries
    That's a shame, it's a good sheltered growing environment along the river at the hermitage, should of put on a lot more height. Wonder if the root failure was decay or shallow rooting? Spent a chilly New Year's Day up there a number of years ago trying to lose a post Hogmanay hangover. Was mightily impressed by the height of the trees there. .
  2. David Humphries
    Nice images Brett what did the tomograph show in terms of the Laetiporus decay? .
  3. David Humphries
    Tree Health Care images for consideration Decay mapping Massaria survey ng Airspade decompaction Bracing Mulching Airspade root protection Foliar compost tea application .
  4. David Humphries
    through the looking glass....
  5. David Humphries
    My favourite part of the UK http://arbtalk.co.uk/forum/lounge/8746-sassenach-nae-more.html .
  6. David Humphries
    As paul said Lots of great galls in this thread...... http://arbtalk.co.uk/forum/picture-forum/7633-get-ya-galls-out-boys.html .
  7. David Humphries
    they (like most open spaces) do have some issues, which is more about the dog owners and control than the actual dogs. [ame] [/ame] .
  8. David Humphries
    Oak standing dead at Richmond Park Interesting to see the level of light and dark on both the southern and northern aspect and to consider the effect this has on the saproxylic species (beetles and fungi) that may be found using either side of the wood volume. .
  9. David Humphries
    Howdee Al, certainly been a mild winter down sarf ain't it ! Suspect as you, that this has led to huge numbers of over wintering grubs becoming an explosion of female wasps this spring. Saw a small young mature oak today that must have had near on 100 galls all across its canopy. .
  10. David Humphries
    Yeah, really well edited. Not sure why its not on the BBC though, i know its been put together for and on behalf of the Friends of Richmond Park and is London-centric but it definitely has a wider appeal. Perhaps it will air on terrestrial TV at some point. A bit surprised that there was little or no mention of current and future bio-security threats to the site and its trees. It has one of the worst (although heavily managed) infestations of Oak Processionary Moth caterpillars in London and Acute Oak Decline. The intense level of visitors must and probably are a vector pathway for some of these things. .
  11. David Humphries
    looks like being a big year for galls, seeing loads on oak .
  12. David Humphries
    Posted else where across the internet, but some people may have missed it. David Attenborough talking about his favorite Urban Open Space [ame] [/ame] .
  13. David Humphries
    Ah, now that's clever ! .
  14. David Humphries
    Does anyone know what that white stuff was where they were cutting ? .
  15. David Humphries
    Short vid on where and how they source 150 tons of spruce to build the fences. https://www.theguardian.com/sport/video/2017/apr/07/meet-men-who-build-the-grand-national-fences-video .
  16. David Humphries
    Yes today, very early indeed. Have seen reports of Laetiporus popping up across the uk, but not here yet. .
  17. David Humphries
    Interesting to watch both the slow movement up the trunk of the fruiting of these Pholiota aurivella but also the change in the month they developed. These from a branch stub toward the top of the trunk today (April) These from the lower and upper mid stem cavities during September 2013 These from just the lower cavity during September 2008 .
  18. David Humphries
    Good example, though I don't recall saying anything about my drinking companions being enlightened .
  19. David Humphries
    Americans call one of these wound types, the 'ball in socket failure' .
  20. David Humphries
    Mighty fine image Mario .
  21. David Humphries
    "The length of a structure free to move at one end in the manner of a lever, such as a branch, and the distribution of weight along that length affecting loading at the base." Taken from from Phillip Wilson's really useful Arb terminology Tree term definitions - Worth getting hold of Claus Mattheck and Ducan Slaters work and then go out in to the woods and see it all in the flesh. No better way to learn .
  22. David Humphries
    Our apprentice is coming to the end of his 20 month stint with us and is moving on to his next opportunity some images of his development....... [ame] [/ame] .
  23. David Humphries
    In the pub having a few jars with a couple of Arbtalkers yesterday and we got chatting about old threads, fungi and stuff and particularly what other species of fungi can be found in other parts of trees from where authors have stated they should be found. One good example is Perenniporia fraxinea, "most commonly forms on the stem base of the host" as David Lonsdale states in PTHAM and "the lower trunk, buttress zone and principal roots" being the areas affected listed in the AA's Arborists Field Guide 'Fungi on Trees' However we now often record it at height on stems and in crown breaks on beech, robinia and other hosts. Any other species of fungi being seen on unusual parts of trees and/or hosts? .
  24. David Humphries
    I'm like Doctor Who Gary, phasing in and out time zones across the universe in search of interesting tree mechanics I'm at work today, I'll nip out with a saw and pop the brace, then we can categorically state whether or not the 'held' section will fail or not.........be back in a mo ! .
  25. David Humphries
    Perhaps some of these presenters haven't been 'watching' individual braces for long enough. This ones been developing for over 70 years (original image is from the 50's) and is still an integral part of the trees structural stability........that is of course until the day it fails and the whole thing comes collapsing down

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