Comparison Of Wood Preservatives In Stake Tests

This publication is a progress report on the condition of modified-wood products and stakes treated with various preservatives and oils. The inspections were made during November 1968 in Wisconsin and in Mississippi. Due to limitations on time, it was necessary to omit inspection of several of the less active installations in Mississippi. The tests at Panama were completed with the final inspection in January 1956. Those at Jacksonville were terminated in December 1960 and those at Bogalusa in December 1962. (Author).

Reports results on test stakes of southern pine sapwood 2 by 4 by 18 inches in size, treated by pressure and nonpressure processes and installed by the Forest Products Laboratory and cooperators in decay and termite exposure sites at various times since 1938 at Saucier, Miss., Madison, Wis., Bogalusa, La., Lake Charles, La., Jacksonville, Fla., and the Canal Zone, Panama. Also included in the tests at Saucier, Miss., are smaller pine stakes and those of treated and untreated plywood, modified woods, laminated paper plastic, and pine infected with Trichoderma mold.

Reports results on test stakes of southern pine sapwood 2 by 4 by 18 inches in size, treated by pressure and nonpressure processes and installed by the Forest Products Laboratory and cooperators in Decay and termite-exposure sites at various times since 1938 at Saucier, Miss.; Madison, Wis.; Bogalusa, La.; Lake Charles, La.; Jacksonville, Fla.; and the Canal Zone, Panama. Superficial treatments by 3-minute dipping and brushing with preservatives such as coal-tar creosote and petroleum oils containing copper naphthenate, zinc naphthenate, phenyl mercury oleate, and pentachlorophenol have added a few months to 4 years to the life of the untreated stakes. Some waterborne preservatives have provided less protection to the stakes than the standard preservative oils, such as coal-tar creosote and pentachlorophenol solutions, when preservative retentions have corresponded to those in commercial use.