[IAWA Forum] Needle fleck

From: Lloyd.Donaldson@forestresearch.co.nz
Subject: [IAWA Forum] Needle fleck
Date: Tue, 27 May 2003 14:53:45 +1200

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Dear Colleagues

I am studying a defect in radiata pine wood which we call needle fleck. It
is initiated by persistent stem needles causing very small (1-2mm)
knot-like structures in a spiral pattern on tangential surfaces. In some
cases these defects are much larger and contain a bark inclusion. This
defect often persists long after the needles are lost and causes
significant degrade to clearwood for high value products. It also creates a
nice figure that wood turners make use of. It may be associated with bird's
eye (indented growth rings).
I cannot find any mention of this defect in the text books I have looked at
so far. I am interested to know if anyone has seen this in other pine
species or if there are any publications that describe it. Thanks

Best regards
Dr Lloyd Donaldson - Microscopist
Cellwall Biotechnology Centre
Forest Research,
Private Bag 3020, Rotorua, New Zealand
Ph 64 7 343 5581
email lloyd.donaldson@forestresearch.co.nz
www.forestresearch.co.nz/mnz

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