Fungicidal Efficacy of Ammoniacal Copper and Zinc Arsenic Preservatives Tested by Soil-Block Cultures

Authors

  • J Rak
  • H Unligil

Keywords:

<i>Pinus resinosa</i>, fungicidal efficacy, ammoniacal preservatives, <i>Coniophora puteana</i>, <i>Poria monticola</i>, <i>Lenzites trabea</i>, Cu, Zn, As, soil-block tests, biodegradation, preservative's, water-borne preservatives

Abstract

Three new preservative formulations-copper-zinc-arsenic-additive (CZAA), copper-arsenic-additive (CAA), and zinc-arsenic-additive (ZAA)—were tested in comparison with four other preservatives by soil-block culture on unleached red pine samples using test fungi Coniophora puteana, Poria monticola, and Lenzites trabea.

Threshold values (based on retentions of all oxides) of 0.1 pound per cubic foot (1.6 kg/m3) for CAA and 0.2 pound per cubic foot (3.2 kg/m3) for CZAA were comparable with threshold values of the commercial preservatives ammoniacal copper arsenate (ACA) at 0.1 pound per cubic foot (1.6 kg/m3) and eliminated copper arsenate type C (CCA-C) at 0.3 pound per cubic foot (4.8 kg/m3). The ZAA formulation had a relatively high threshold value [0.6 pound per cubic foot (9.6 kg/m3)]. Thresholds based on As2O5 retentions only indicated the fungicidal efficacy in decreasing order: ACA or CAA > CZAA > CCA-C > ZAA.

Coniophora puteana (A328, EFPL) was more resistant to all tested preservatives (except ZAA) than the standard strains of Poria monticola and Lenzites trabea.

References

Becker, G. H. R. 1964. Vergleiche der Wirksamkeit von Holzschutzmitteln gegen Pilze und Insekten. Holz Roh-Werkst. 22:51-57.nCanadian Forest Service (CFS). 1972. Fixed clean preservative treatment for timbers. Can. For. Serv., Res. News, 15 (1):2.nClarke, M. R., and J. Rak. 1974. New developments of water-borne preservatives for forest products. For. Chron. 5(3):114.nCowling, E. B. 1957. The relative preservative tolerances of 18 wood-destroying fungi. For. Prod. J. 7(10):355-359.nDuncan, C. G., and F. F. Lombard. 1965. Fungi associated with principal decays in wood products in the United States. USDA For. Serv. Res. Pap. WO-4. Washington, D.C.nMcQuire, A. J. 1972. Ground contact retentions for copper-chrome-arsenate preservatives. Am. Wood-Preserv. Assoc. Proc. 68:22-27.nRak, J. 1975a. Penetration by and stability of copper-chrome-arsenic wood preservatives. Can. For. Serv. East. For. Prod. Lab., Ottawa. Rep. OPX-87E.nRak, J. 1975b. New evaluation of water-repellency of wood by contact angle. Wood Fiber 7(1):16-24.nRak, J. 1976. Leaching of toxic elements from spruce treated with ammoniacal solutions of copper-zinc-arsenic preservatives. Wood Sci. Technol. 10(1):47-56.nRak, J., and M. R. Clarke. 1974. Leachability of new water-borne preservative systems for difficult-to-treat wood products. Am. Wood-Preserv. Assoc. Proc. 70:27-32.nRak, J., and M. R. Clarke. 1975. Status of the research and development of a new preservative system (EFPL) for pressure treatment of spruce in Canada. Paper presented at the Annual Meeting of International Research Group on Wood Preservation. Jadwisin, Doc. No. IRG/WP/348.nRennerfelt, E. 1963. A comparison between Swedish field tests and laboratory experiments with some wood preservatives. Am. Wood-Preserv. Assoc. Proc. 59:19-27.nSmith, R. S., and L. R. Gjovik. 1972. Inter-laboratory testing of wood preservatives using ASTM D 1413-61. Wood Fiber 4(3):170-178.nUnligil, H. H. 1972. Tolerance of some Canadian strains of wood-rotting fungi to wood preservatives. For. Prod. J. 22(1):40-45.nWallace, E. M. 1968. The copper-chrome-arsenate preservatives and their use in modern wood preservation. Am. Wood-Preserv. Assoc. Proc. 64:50-56.n

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Published

2007-06-19

Issue

Number 4 / Winter 1978

Section

Research Contributions

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