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David Humphries

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Everything posted by David Humphries

  1. David Humphries
    Xylella's been on the scientific radar for decades. Just not been talked about 'locally' until the last two or three years. .
  2. David Humphries
    Some good input from various people on this old thread.... http://arbtalk.co.uk/forum/tree-health-care/2847-mulch-not-mulch.html .
  3. David Humphries
    Repeatedly perhaps, particular on young newly planted thin bark species, who knows ? .
  4. David Humphries
    No mention by the authors of potential other pathogens to be mindful of that may/will also affect Aesculus (amongst many other tree species) such as the bacterium Xylella fastidiosa ? .
  5. David Humphries
    Not trees having a leak, but other things having a leak on trees. On another thread recently regarding veteran trees Bolthole brought up the interesting point around whether repeated urination would possibly have an effect on the bark of trees. This raises an interesting discussion point and deserves its own thread. Having a quick look around the web I found this interesting blog (which I'd already posted on the above mentioned thread) that offers some insight to the potential issue. Why You Shouldn't Let Your Dog Pee on Trees - CityLab The London Tree Officers Association had a working party looking at the issues around dog damage to trees and released a guidance document but to my knowledge we haven't specifically looked at the potential urine issue. If anyone knows of any specific research on this I'd appreciate seeing any links or reading your thoughts. .
  6. David Humphries
    Interesting observation, is it consistent across different species? Be good to see some images Is that a rogue Pug that's scrambled up and is poking out from the trunk? .
  7. David Humphries
    Looks like a good candidate for mulching (as well as reduction) as suggested earlier.
  8. David Humphries
    Likewise, 'anecdotally' seen this at lots of sites where there are trees around car parks. .
  9. David Humphries
    Not sure if anyone's studied this in depth but there is mention of it in text books and this 'blog' sheds some interesting light on the issue..... Why You Shouldn't Let Your Dog Pee on Trees - CityLab .
  10. David Humphries
    Nice context with the shot Jake .
  11. David Humphries
    Good call .
  12. David Humphries
    Think thats' referred to as a 'giraffe' pollard Leaving the one sap riser to keep the tree pumping assimilates between the green top things and the brown tendrilly things under ground. Pollarders used to go round to different sited cutting the particular poles they or the tree owners wanted (for there specific requirements) leaving the ones they didn't want to keep growing bigger or weighted them to create specific shapes. I've seen 'giraffe' prunning attempted here in the uk as a way of restoring lapsed pollards but don't think it's particularly successful. .
  13. David Humphries
    Kinda, like a stem that is weakly anchored. .
  14. David Humphries
    Toward the original bole. Lapsed pollards can't ever really be treated as an ongoing young pollard would. The starch reserves in the bole are long gone, so rejuvenation at this point is unlikely. Do you have access to this David Lonsdale book ? http://ancienttreeforum.co.uk/wp-content/uploads/2015/02/ATF_book.pdf very good management guidance to be found inside 4.5.1 Management of lapsed and restored pollards Page 100 .
  15. David Humphries
    Smaller sail = more stability Mick The poles are on a decayed trunk. .
  16. David Humphries
    Snooze, ya lose .
  17. David Humphries
    Repollard would probably kill it. TO's 2m reduction sounds sensible, especially if there are epicormic growths existing along the pollard poles. Perhaps looking to bring it further down toward the top of the boling over a number of phased reductions. Cracking tree, surprising to see it surviving in such an urban situation. Where is it? .
  18. David Humphries
    This one? .
  19. David Humphries
    Yep, a bit sneaky as its not too common. This ones on a Fulham oak on the Heath. It also fruits on a veteran wild service that we manage. .
  20. David Humphries
    Aurantiporus fissilis - the greasy bracket. .
  21. David Humphries
    But agreed, as your great images clearly show, it can look very pale .
  22. David Humphries
    I'd say hispidus is pale more than white. Certainly not clean white as in the unidentified specimen with the gutation on post They darken to more notable yellow then brown as they mature due mostly to having very yellow spore. .
  23. David Humphries
    Not hispidus sean, that would have a yellowy/brown pore layer. .
  24. David Humphries
    Brown specks are not spore. None of those you mention. .
  25. David Humphries
    How about this one....... .

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