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  1. KTSmith

    Dawn Redwood Bark Cracks

    Looks like redwood canker to me. I'd start here to check it out: https://ucanr.edu/sites/Mendocino/files/347575.pdf
  2. KTSmith

    Reaction Wood

    Oooh, that's the branch of philosophy that could use more explicit understanding, both in arboriculture and in everything else! How do we know what we know? No way that that would go off the rails!
  3. KTSmith

    Reaction Wood

    Well, of course contemporary usage of a word may drift away from its origin or etymology. As far as roots are concerned, research simply means to search intensively or to search again. I've been paid to be a researcher for 45 years or so. Nobody has yet told me directly what that means. My...
  4. KTSmith

    ISA Arborist to BCMA

    Don't be too hard on yourself, oldoakman. I'm still a little unnerved with the large-scale webinar platform that shows my powerpoint deck but I can't see you and you can't see me. But then again, I still check my ppt deck to be sure that the slides are all the right way up and text is...
  5. KTSmith

    Tree Cancer

    Black knot is a real nuisance (and more) to be sure. The endemic nature of this native disease on wild, native black cherry is a primary limitation to the commercial cultivation of susceptible cherry, plum, etc. here in the northeast. Sanitation pruning needs to be ongoing and as Tom describes...
  6. KTSmith

    ISA Arborist to BCMA

    I don't earn CEUs myself, but I know that free CEUs (including science ones) are available through the Urban Forestry Today webinar series here. I did a session last month and another one next month that gives CEU credit. Also, ISA offers some readings from Arborist News with a quiz to score...
  7. KTSmith

    Please help identify small tree in my garden!

    I'd add that this looks more like mites on the leaf underside. Take a good magnifying glass and look. If you don't have one and you care for plants, you'll find it frequently of value. If pale white threads and occasional webbing is seen, and maybe even itty-bitty spidery creatures, then go with...
  8. KTSmith

    Practical Tree Repair

    I read "rind" as the outer bark (rhytidome) plus what other tissues peel off with the bark as it is peeled off. This is empirically defined, practically defined, as what peels off as with the skin of an orange. So sure, there would be inner bark (phloem) and vascular cambium, especially early in...
  9. KTSmith

    Practical Tree Repair

    And a not;-too-bad pdf of a more recent edition of that text is available at Archive.org and is linked here (8 MB or so).
  10. KTSmith

    Practical Tree Repair

    The point of the asphalt was to provide a nice smooth surface (?) that fills in cracks, breaks, etc. Yes, the Peets' book above shows state-of-the-art/science for its time. And that continued to be the standard of professionalism prior to Alex Shigo (and a few others) in the 1970s. I've attached...
  11. KTSmith

    Alex Shigo anniversary

    I just wanted to publicly express my gratitude to the work and friendship of Alex Shigo who died from a fall at his lake home in Barrington, NH on October 6, 2006. Al may not have gotten all of the details perfectly right, every time, but his expertise and prescience still impresses the heck...
  12. KTSmith

    Hey Look at My Crud...

    That's great Mr. Serf to have that experience! Yes, they are out now. Younger specimens are more likely to be bioluminescent. Interestingly (to me, anyway) is that some diverse groups of fungi have that trait of bioluminescence. That tells me that the trait arose more than once in evolutionary...
  13. KTSmith

    Hey Look at My Crud...

    Splendid, the violet coral (Clavaria zollingeri). I haven't seen it yet this year. Lots of coral fungi out right now! Lovely.
  14. KTSmith

    Hey Look at My Crud...

    What does the underside look like? Slippery jack is a bolete, meaning that the underside has pores. I betcha that these have somewhat decurrent gills. I'd start with the Jack O'Lantern mushroom, Omphalotus illudens.
  15. KTSmith

    Possibly the biggest English Walnut tree ever

    As Evo called, I'm not convinced of it being English just on the basis of numbers of leaflets per rachis (>12). Leaf margins could help! 'Course, it's a splendid tree!
  16. KTSmith

    Possibly the biggest English Walnut tree ever

    DBH? Have you checked to see the size of the listed champion walnut (of various stripes) for your state? For the national registry of champs, check out: https://www.americanforests.org/champion-trees/champion-trees-registry/ and search for genus Juglans. They show butternut, Arizona walnut, and...
  17. KTSmith

    Caps, conks, mushrooms, toadstools, basidiocarps, buttons, puffballs, clubs, corals, brackets, shelves, jellies, and crusts ID thread

    For Tremuel, sure, it's mostly non-descript but I see an effused-reflexed edge or margin to the patch and when I zoom in on the center, I think I see little teeth or pores developing. So I'd start with genus Odontia and go from there. Does indicate dead wood, but Odontia is secondary. Now, a...
  18. KTSmith

    Remove or monitor?

    Part of the problem with these "soft rot" (a misnomer to me) decays is that substantial loss of structural strength can occur with little overall decline in apparent health with respect to crown dieback. Sugar maple don't seem to go as fast as Norway maple in these parts.
  19. KTSmith

    Dawn Redwood malady - 2 isolated branches dying

    Neill may have it, or at least some sort of branch canker. UC ANR extension office has this article by Bruce Hagen. Not much specific help.
  20. KTSmith

    Hemlock Cones - finally !

    I think Treezy has got it. It is often referred to as Melampsora farlowii. I think one of the judgement calls on naming rests on whether a single rust species infects foliage, twigs, cones or whether there is plant-part specificity.

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