This seventh annual report outlines our continued progress on each of six
objectives.
Improved fumigants: We continue to evaluate previously established field
tests, which inlicate that chioropicrin continues to protect Douglas-fir poles
after 17 years and piling after 12 years. Vorlex treated poles are being
gradually recolonized by decay fungi,...
A small-scale test was developed to evaluate the ability of fungicides to control decay fungi established in wood. The test, which uses blocks 2.5 x 2.5 x 10 cm, tests the ability of a chemical to migrate from the middle of the block to control a previously established decay fungus,...
Evaluation of previously established
field trials of internal remedial treatments
continues to verify the excellent long-term
protection afforded by these treatments.
Field trials with gell encapsulated
methylisothiocyanate (MITC) demonstrate
that gelatin does not interfere with
chemical release, nor is addition of
supplemental moisture required for release.
Field trials have been...
Evaluations of previously established field trials indicate that
chioropicrin and Vorlex continue to provide a diminishing level of protection to
Douglas-fir poles. Tests of solid methylisothiocyanate (MITC), now in their
thirteenth year, indicate that this chemical continues to prevent recolonization
of Douglas-fir poles by decay fungi. MITC appears to provide...
Evaluation of previously established
field trials of remedial internal treatments
demonstrates the continued performance of
chioropicrin, Vorlex, and
methylisothiocyanate (MITC). While the
degree of protection afforded by these
treatments has declined with time, residual
fungitoxic levels remain in many tests.
Field trials of gelatin encapsulated MITC
indicate that gelatin had...
Evaluations of previously established field trials indicate that
chioropicrin, and Vorlex continue to provide protection to Douglas-fir poles,
although the degree of protection is diminishing. Reapplication of Vapam 18
years after the initial application eliminated fungi which had recolonized the
poles. Methylisothiocyanate (MITC) continues to protect Douglas-fir poles 12
years...
Previously established field trials of
MTTC-Fume continue to show that this
chemical remains in Douglas-fir and southern
pine poles at fungitoxic levels 5 years after
treatment. In general, increasing dosages
resulted in higher chemical levels in the poles.
All of the MITC-Fume treatments resulted in
higher residual M1TC levels than...
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OBJECTIVE I: DEVELOP SAFER CHEMICALS FOR CONTROLLING
INTERNAL DECAY OF WOOD POLES
The Cooperative continues to actively
address a diverse array of issues related to
the effective use of wood utility poles.
The trials to evaluate the effectiveness of
MITC-Fume are now in their seventh year
and continue to show that methylisothiocyanate
(MITC) levels in MITC-Fume
treatments remain higher than comparable
metham...
