. An annotated list of the important North American forest insects. Forest insects. 24 BULLETIN UCO, U. S. DEPAKTMEXT OF AGRICULTURE wood of all kinds of timber. They may either be stained black inside or be of the same color as the surrounding -wood, and they may be free and open or filled with tightly-lodfred boring dust, depending on the kind of insect making them. This boring dust does not fall out when the wood is jarred. Grub holes are made in the living tree, in the saw log, or in piled green lumber. In nearly all cases the injury is caused by the 3'oung borers, sawyers, or grubs, but o
. An annotated list of the important North American forest insects. Forest insects. 24 BULLETIN UCO, U. S. DEPAKTMEXT OF AGRICULTURE wood of all kinds of timber. They may either be stained black inside or be of the same color as the surrounding -wood, and they may be free and open or filled with tightly-lodfred boring dust, depending on the kind of insect making them. This boring dust does not fall out when the wood is jarred. Grub holes are made in the living tree, in the saw log, or in piled green lumber. In nearly all cases the injury is caused by the 3'oung borers, sawyers, or grubs, but occasionally also by adult termites or white ants (fig. 18), adult. Fig. lil).—Woimhole dufucts in codar, caused by the rouiul-hoaded borer VuUidium aiiteniiatuin carpenter bees ^^ (fig. 19), or carpenter ants^^ (fig. 20), or by the larvae of horntails ^^ (fig. 21). Usually this type of injury is con- sidered as " wormholes, no living worm's or decay," especially if the holes are stained black, and no further damage will result, except in rare cases. Grub holes constitute a standard defect and are also included under "equivalent ; They are often of considerable size ^^ Xi/locopa spp. " Caiiipoiiotiis spp. 1" Tnmcv oolnmba or i^irea- spp.; they usually damage only dead wood or trees or logs that have been left in the woods too 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
Size: 1580px × 1582px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorhopkinsadandrewdelmar, bookcentury1900, bookdecade1900
