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Tree Defects: Decay

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Image Subject Name Scientific Name Description
5375368 risk tree Here you can see the thin drill bit of a resistance-recording drill.
5375366 risk tree Resistance-recording drill in use.
5375367 risk tree Up close view of a resistance-recording drill against the tree.
5375365 risk tree Resistance-recording drills are an advanced drilling tools that measure the resistance over the distance drilled, which allows for fairly effective decay detection.  However, like all decay detection methods, this equipment still have limitations. 
5439696 visual tree inspection
5439695 visual tree inspection
5439686 visual tree inspection
5053048 risk tree White birch with decay and defects overlooking a playground.
5053050 risk tree American beech shedding branches; bole with extensive decay.
5038093 risk tree Hole in very large branch, indicating decay.
5252048 risk tree Hole in tree, indicating decay.
5054023 risk tree A large tree with extensive decay that failed in a campground
5039090 risk tree Old broken branch with decay
5055038 risk tree Long crack and decay
5053037 risk tree Multiple defects (cracks, decay, poor branch angles) in a yard tree.
5053054 risk tree Large tree with multiple defects, including cracks, decay, dead branches.
5044080 risk tree Sealed-over crack with decay.
5044081 risk tree Hazard tree crack with sawdust at base of tree, indicating decay.
5298013 Compartmentalization Of Decay In Trees (CODIT)
5298014 Compartmentalization Of Decay In Trees (CODIT)
5291093 stubs Stubs provide not only an entry point for decay organisms but also a food source. Large stubs only serve to feed the fungi decaying the wood
5177096 stubs leaving stubs can provide a route of entry for decay fungi especially on large limbs. Note the orange-yellow fruiting bodies on the underside of the limb.
5026008 tree implants Old capsules found in cross-section after tree was removed. Notice the peculiar pattern of decay surrounding the implants. Cross-sections provided by Dan Veresh.
5026009 tree implants Old capsules found in cross-section after tree was removed. Notice the peculiar pattern of decay surrounding the implants. Cross-sections provided by Dan Veresh.
5026010 tree implants Old capsules found in cross-section after tree was removed. Notice the peculiar pattern of decay surrounding the implants. Cross-sections provided by Dan Veresh.
5026011 tree implants Old capsules found in cross-section after tree was removed. Notice the peculiar pattern of decay surrounding the implants. Cross-sections provided by Dan Veresh.
5026012 tree implants Old capsules found in cross-section after tree was removed. Notice the peculiar pattern of decay surrounding the implants. Cross-sections provided by Dan Veresh.
1408049 flush cut Fruit bodies of fungi often burst through wound dressings. This is a sure sign of decay, which can be stimulated by too much dressing.
1409012 Compartmentalization Of Decay In Trees (CODIT) Hollows are found in trees that have heartwood
1409020 Compartmentalization Of Decay In Trees (CODIT) This white oak had five basal wounds. The triangular-shaped discolored and decayed wood was formed by walls 2 and 3 which resisted spread, and wall 4 which separated infected wood from healthy wood.
1409013 Compartmentalization Of Decay In Trees (CODIT) Hollows are found in trees that have heartwood
1409019 Compartmentalization Of Decay In Trees (CODIT) CODIT is a model that applies to both non-heartwood and heartwood-forming trees
1408059 Compartmentalization Of Decay In Trees (CODIT) Trees can wall off wounds effectively, but as damage accumulates over time, internal columns of infected wood begin to merge. This happens even with small wounds,
1409005 Compartmentalization Of Decay In Trees (CODIT) Patterns of discolored and decayed wood could be studied on both longitudinal and crosscut surfaces.
1409006 Compartmentalization Of Decay In Trees (CODIT) Since 1959 thousands of trees have been dissected and studied this way.
1409014 Compartmentalization Of Decay In Trees (CODIT) The same patterns of compartmentalization occur in roots.
1408038 flush cut you will later see an obvious early warning sign of decay -- a dead spot at the base of the cut.
1408039 flush cut Decay spreads rapidly from dead spots. No amount or type of wound dressing will help.
1408040 flush cut The size of the callus is not related to the decay process but depends on how rapidly the tree grows after pruning. All too often, big callus rings belie the presence of decayed wood or hollows inside.

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