. An annotated list of the important North American forest insects. Forest insects. DEFECTS IX TIMBER CAUSED BY INSECTS 31 effective preventives, can not be used, in manner of the laying of the eggs in tlie pores of the wood, any substances that will close the pores will prevent oviposi- tion in wood not pre- viously infested. In wood from .which bee- tles have emerged, however, eggs might be laid within the exit holes. Paraffin wax. varnish, linseed oil, or other fillers effectively close the pores of wood. A certain var- nish known as hard- ened gloss oil is com- monly used. Wood that has be
. An annotated list of the important North American forest insects. Forest insects. DEFECTS IX TIMBER CAUSED BY INSECTS 31 effective preventives, can not be used, in manner of the laying of the eggs in tlie pores of the wood, any substances that will close the pores will prevent oviposi- tion in wood not pre- viously infested. In wood from .which bee- tles have emerged, however, eggs might be laid within the exit holes. Paraffin wax. varnish, linseed oil, or other fillers effectively close the pores of wood. A certain var- nish known as hard- ened gloss oil is com- monly used. Wood that has been sea- soned less than 8 to 10 months will not be attacked by Lyctus beetles; therefore, in applying chemical preventives, only sap- wood that has been seasoned for 8 to 10 months and longer need be treated. The seasonal history of these beetles indicates that preventives should be applied be- fore March 1. The great and re- curring expense of treating infested Avood can be avoided by prevention of attack by proper methods of management. Since only the sapwood or whitewood is attacked but they stain the wood; hence, where they the light of the discovery of the place and. ,,;, :;:-;—iinlt> li\ tlir liainled :ish liorer {^lncll|tus caprcHU). one of the puwder-post beetles. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Craighead, Frank C. (Frank Cooper), 1890-; Perry, George S; Snyder, Thomas Elliott, b. 1885; Hopkins, A. D. (Andrew Delmar), 1857-1948; MacAloney, Harvey John, 1896-; Graham, Samuel Alexander, 1891-; Peirson, Henry Byron, 1894-; Herrick, Glenn W. (Glenn Washington), 1870-1965; Britton, Wilton Everett, 1868-1939; Tanaka, T; Sanders, J. G; Howard, L. O. (Leland Ossian), 1857-1950; Chittenden, F. H. (Frank Hurlbut), 1858-1929; St. George, R. A. (Raymond Alexander), b. 1894; Beal
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Keywords: ., bookauthorhopkinsadandrewdelmar, bookcentury1900, bookdecade1900
