. Bulletin. Forests and forestry. Insect Enemies of Shade Trees and SIiniJ>s SI After hatching from the e<ii;s tlie larvae bore through the living' caiiibiuni on the surface of the sapwood at right angles to the egg-gallerv. The galleries extend foi- a distance of three inches or more and, as the trunk and lai'gei- branches of each tree is attacked by many ])roods at the same time, the flow of sap is cut off in a vcu-y few days and the tree is. TW^ n a' Fig. 39. Trunk of tree killed by the hickory bark beetle with part of bark removed showing brood bur- rows. (Original) killed within a v
. Bulletin. Forests and forestry. Insect Enemies of Shade Trees and SIiniJ>s SI After hatching from the e<ii;s tlie larvae bore through the living' caiiibiuni on the surface of the sapwood at right angles to the egg-gallerv. The galleries extend foi- a distance of three inches or more and, as the trunk and lai'gei- branches of each tree is attacked by many ])roods at the same time, the flow of sap is cut off in a vcu-y few days and the tree is. TW^ n a' Fig. 39. Trunk of tree killed by the hickory bark beetle with part of bark removed showing brood bur- rows. (Original) killed within a very few^ weeks. The attack of the brood u})on the inner bark begins in the locality of Syracuse about the middle of July and continues up until the latter ])art of August. Living adults have been found in their egg-galleries as late as October 1st, although most of the beetles have laid their eggs and died before September 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 State University College of Forestry at Syracuse University. Syracuse, N. Y.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
