Circular Volume 124-130 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 edition. Excerpt: ...insect investigations. E. F. Phillips, in charge of bee culture. D. M. Rogers, in charge of preventing spread of moths, field work. Rolla P. Currie, in charge of editorial work. Mabel Colcord, librarian. Forest Insect Investigations. A. D. Hopkins, in charge. H. E. Burke, J. L. Webr, Josef Brunner, S. A. Rohwer, T. E. Snydeb, W. D. Edmondston, agents and experts. Mary E. Faunce, preparator. William Middleton, Mary C. Johnson, student assistants. CCir. 128 ii CIRCULAR No. 128. Issued December 8, 1910. United States Department of Agriculture, BUREAU OF ENTOMOLOGY. L. O. HOWARD, Entomologist and Chief of Bureau. INSECT INJURIES TO FOREST PRODUCTS." By A. D. Hopkins, In Charge of Forest Insect Investigations. Damage is caused by various species of insects which are attracted by the varying conditions prevailing at different stages during the process of utilizing the forest resources, from the time the trees are felled until the logs are converted into the crude and finished product and until the latter reaches the final consumer, or even after it is placed in the finished article or structure. As a result, additional drains are made on the timber to meet the demand for the higher grades of lumber and for other supplies to replace those injured or destroyed. From the writer's personal investigations of this subject in different sections of the country it is evident that the damage to iorest products of various kinds from this cause is far more extensive than is generally recognized. This loss differs from that resulting from insect damage to standing timber in that it represents more directly a loss of money invested in material and labor. CRUDE PRODUCTS. Roundheaded borers, timber worms, and ambrosia 'beetles.--Round timber with the bark on, such as...