Fungi inhabiting southern pine utility poles during manufacture
2006
Anagnost, S.E. | Zhou, S. | Yeo, H. | Wang, C.J.K. | Smith, W.B. | Roberts, D.M.
Southern pine utility poles were examined at two commercial sites in the southeastern United States for the presence of fungi during the processing steps of storage, kiln-drying, and treatment with chromated copper arsenate (CCA) preservative. Active fungi were recovered from green poles that had been peeled and stored at the treating facilities for 2 days, 2 weeks, or 6 weeks prior to kiln-drying. No fungi were recovered at either site immediately after kiln-drying, indicating that high-temperature kiln-drying effectively eradicated fungi from these poles. A subset of kiln-dried poles deliberately left untreated for an extended storage period (12 weeks at Site A and 2, 4, 6, and 8 weeks at Site B) produced a significant number of isolates. Soft-rot fungi were isolated after 2 weeks, Basidiomycete fungi after 6 weeks. Weather conditions, particularly precipitation, appeared to contribute to re-colonization. Results suggest that a maximum of 2 weeks of storage after kiln-drying before preservative treatment would be prudent, particularly in regions of high moisture and temperature.
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