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David Humphries

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Everything posted by David Humphries

  1. David Humphries
    it may be symptomatic of HCBC but don't rule out other pathogens involved. We had a mature HC with historical bleeding canker that declined fairly rapidly, but was also subject to Armillaria. If you get a chance to do as Guy suggests, whilst having a dig around at the base of the dysfunction keep an eye out for rhizomorphs. .
  2. David Humphries
    No Paul, we've not gone down that route yet .
  3. David Humphries
    I've passed this tree every work day for the last thirty years so there may be a decent chance that I'll update the thread next year If the oportunity arises, I may take chlorophyl fluorescence readings across the canopy to try to ascertain the vitality of the tree. .
  4. David Humphries
    Any close ups? The context is good but a look at the stem & gills would be useful. A guess would be Mycena sp, if so then I would suspect them to be saprophytically active on the compressed/detached/dead bits of bark on the ridge. .
  5. David Humphries
    I've been caught out with oak polypore before, thinking I had found it at a new site only for it to be confirmed at Kew as Laetiporus Yours (although heavily dessicated) looks to be a decent shout for Op but I would send it off for confirmation. What's the site? Any other records for it there? Contact at Kew is Martin Ainsworth [email protected] for comparison here's an open one showing the flesh and pore layer from Staverton Park....... the flesh is discoloured (due to air contact) and would have been lighter .
  6. David Humphries
    For a start they are one of only four fungal species protected by law and it is an offence to look at one let alone actually touch one ! I have no option but to grass on ya and inform the relevant authorities.
  7. David Humphries
    Depends largely on location, site & objective. But I tend towards the health of the remaining trees to be the key. Poor rooting environment will probably lead to stressed trees which leads to attack. Perhaps leave the stumps for the Armillaria to devour as a diversionary tactic. .
  8. David Humphries
    Interesting presentation Guy, thanks for sharing. I often find these types of Power Points hard to stay focussed through-out so appreciate the chance to see them afterwards. Helps if you get the odd banana thrown at you by the presenter. A little difficult to follow in parts without the benefit of the talk to go with it. But I think we got the gist. How long was it. Have you had experience of return visits to trees that have been subject to Armillaria then had soil amelioration undertaken? .
  9. David Humphries
    Hello Paul, Thanks for your comment. As you know, there is documentation from Glynn and others that air spading can have a positive effect against Armillaria, but I believe that as this area is inundated with the dead roots of previously removed trees out on the roadside path outside the park, the top soil layer will have a significant volume of active rhizomorphs through out it. We're considering a further reduction of the height of this lime, but that will no doubt have an effect on the creation and distribution of produced energy which could tip the balance of this trees ability to keep healthy and functional against the presence of Armillaria. .
  10. David Humphries
    Big shadow baldy heed ! .
  11. David Humphries
    the soil was saturated around the root zone and made identifying the rhizomorphs from root a little difficult but a wash and seperation soon helps all the material in the last image are rhizomorphs .
  12. David Humphries
    in the second pit we soon came upon a subteranian girdling root across one of the main roots. The airspade stripped the bark off this girdler and on inspection it was discovered to be dysfunctional & heavily decayed. Again, the adjacent roots & butresses appeared pretty sound and functional. .
  13. David Humphries
    today we took the opportunity to have a closer look & investigate the situation regarding the lime specifically. We airspaded out a couple of areas where there had been fruitbodies at the base of the tree, and were not surprised to find a significant number of rhizomorph bootlaces in amongst the roots of the lime. in the first opened pit we discovered a heavily degraded (white rotted) smaller root but the buttresses and major roots appeared sound after a tap with a sounding hammer .
  14. David Humphries
    The immediate locality has a large number of fruiting bodies popping up both inside this park and also at the base of neighbouring street trees (horse chestnut & hornbeam) .
  15. David Humphries
    One of our team picked up on the fruiting of an Armillaria species whilst out inspecting this lime recently. The google image below is the tree from July this year, which appears to show the tree in relatively good vascular health It was reduced in height approximately 6 years ago due to its isolation against the prevaling wind direction. The fruit bodies are consitant with what I would expect of Armillaria mellea as opposed to Armillaria gallica. A. mellea is considered a more aggressive pathogen than the more benign A. gallica species.
  16. David Humphries
    Thanks Mario have you ever had the opportunity to calibrate your laser measurements on one of these enormous trees against a taped measurement taken from a climbed tree? .
  17. David Humphries
    Hello, you are aware that this thread is from 2011? .
  18. David Humphries
    You're welcome John, puzzlers like this help build a picture of tree species and there associations. I keep on learning Have you ever considered the Arbtalk Fungi ID app? I'm pretty sure Helvella is on there and it's situations like yours that it was developed for and may have of helped you in the field. .
  19. David Humphries
    This one? The line is probably the grafting point as this is a copper beech, the lighter banding looks to me to be reflection of the the light/moisture on a raised bark swelling. .
  20. David Humphries
    Neither Grifola or Meripilus John, this is Helvella crispa (white saddle) saprophytic fungi, by itself there's nothing to be concerned about regarding tree health and structural condition. Helvella crispa - the white saddle - David Humphries’s Fungi Directory - Arbtalk.co.uk | Discussion Forum for Arborists Rogers Mushrooms - Helvella crispa Mushroom .
  21. David Humphries
    Difficult to Id from this image John, but I'd be more inclined toward Meripilus than Grifola, based on the image. Is the fruit body in the top of the picture the same as the main example or something different? .
  22. David Humphries
    I can't see any images, if you're still finding it difficult to post them feel free to e-mail them to me and I'll post them up for you. [email protected] .
  23. David Humphries
    Hello Mario Did you use the same lasers and measuring point as with 2011? What equipment do you use? Thanks David
  24. David Humphries
    Well edited Mr Rule. Do you wear helmet comms during a crane dismantles or do you prefer/rely on hand signals mostly? .
  25. David Humphries
    Lucky kids, they'll have that experience in their memory banks for a long time. .

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