. Insects injurious to forests and forest products. et in the groundare seriously injured by wood-boring insects, the problem of insectdamage to standing poles, posts, and other timbers has never beenmade the subject of a special investigation. In May, 1910, this study was assigned to the writer, and, in addi-tion to a study of the insects involved, investigations in cooperationwith telephone and telegraph companies have been conducted in theDistrict of Columbia, Maryland, Virginia, Pennsylvania, New Jersey,and New York. Through the courtesy of the Western Union Tele-graph Company several tele
. Insects injurious to forests and forest products. et in the groundare seriously injured by wood-boring insects, the problem of insectdamage to standing poles, posts, and other timbers has never beenmade the subject of a special investigation. In May, 1910, this study was assigned to the writer, and, in addi-tion to a study of the insects involved, investigations in cooperationwith telephone and telegraph companies have been conducted in theDistrict of Columbia, Maryland, Virginia, Pennsylvania, New Jersey,and New York. Through the courtesy of the Western Union Tele-graph Company several telegraph lines were inspected in July andAugust, 1910, in Virginia, where the poles w^ere being reset or the butts of over 200 poles set under different conditions ofsite were thoroughly examined for insect damage, and sometimes the a Insect Depredations in North American Forests. <Bul. 58, Part V, Bureau ofEntomology, U. S. Department of Agriculture, p. 67, 1909. 94 I, Bureau of Entomology, U. S. Dept. of Ai^riculturo. Plate Fig. 1.—The Chestnut Telephone-pole Borer (Parandra brun-NEA): Male and Female Beetles. Fig. 2.—The ChestnutTelephone-pole Borer: Young Larv/e, Dorsal and LateralViews. Fig. 1, Slightly Enlarged; Fig. 2, Twice NaturalSize. (Original.)injuriou10unit
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectelectri, bookyear1910
