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TREE EVALUATION
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Tree evaluations can give
some forewarning to structural problems or weaknesses that may
result in tree failure (limbs or leaders breaking) or complete
tree failure (the tree falling over).
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The split leaders (left) were
the result of weak attachments because of acute branch
angles and included bark of
co-dominante stems.
Fortunately the failure only resulted in minor property damage
and no injuries.
The result of this
same defect can be seen on the multi-trunk melaleuca to the
right. This failure landed on a car.
Multi-trunks can
be attractive but are very weak.
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An evaluation of the live
oak (left) determined that there was extensive root decay. The
crown had severe dieback and, duringthe winter, the area within
the dripline had a large number of honey mushrooms (right).
These honey mushrooms are the fruiting body of oak root fungus,
Armillaria mellea. The tree was not removed and fell
over. Fortunately, there were no injuries.
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Above are the basidiocarps
of the white rot,
Ganoderma applanatum.
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CONKS & MUSHROOMS
-- signs of decay --
By the time conks
appear,
the fungus has been decomposing
the wood for years.
Breaking off the conk or
removing
the mushrooms does nothing to
stop the fungus. The majority of the fungus, the mycelium,
is in the
wood or cambium.
Decay
detection may help determine
the extent of internal decay.
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The conks of Ganoderma
lucidum,
a white rot (above) are a
sign of
decay inside the base of this trunk. This fungus kills the
cambium as well as rotting the wood. This will lead to complete
tree failure.
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An evaluation can also spot
conditions causing tree stress.
Stressed trees are more susceptible to deseases and insect
attacks than are healthy trees.
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The blue gum eucalyptus
(left), Eucalyptus globulus, were killed by the eucalyptus
long-horned beetle. The beetle is a secondary infestation
and (in the blue gum's natural habitat) a natural weeding agent
of stressed and unhealthy trees. The trees were stressed after
years of drought and no supplemental irrigation. The beetles
are able to enter the cambium area of the tree where the larvae
destroy the tree's ability to transport water resulting in death.
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Above are the channels the feeding
larvae create under the bark.
This is what is left of the tree's
vascular bundle.
There are different bark beetles
for different genus of trees,
but the result is the same and
the primary cause is stress.
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An evaluation
is also invaluable in protecting the health
and future of specimen trees and recommending
proper care & maintenance.
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This California sycamore, Plantanus
racemosa, had an evaluation prior to starting construction
of a sub-division. As a result of the evaluation, competing
trees within the dripline were removed. The area within the
dripline was mulched and a construction fence was placed approximately
five feet outside the dripline to protect the root zone during
construction.
This tree has since been successfully registered
as the National co-champion for the largest California sycamore.
It is located in Poway, California.
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Call 619-443-1770 for an evaluation before it's too
late!
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"When experience is important!"
