. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. Flu. :i.—Trees girdled by different methods: a, Hacli-girdled; 0, girdled to heartwood: r. liack- girdled and peeled; d, hack and belt-girdled. developed and emerged. The trees that were peeled, however, were not attacked by Dendroctonus, but had been infested by great num- bers of round-headed bark and wood borers of the genus Tetropium. On June 8 more hack-girdled and peeled spruce were examined near Rump Pond Camp, which had been infested with Polygraphus and other insects, but not with Dendroctonus. REPORT ON
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. Flu. :i.—Trees girdled by different methods: a, Hacli-girdled; 0, girdled to heartwood: r. liack- girdled and peeled; d, hack and belt-girdled. developed and emerged. The trees that were peeled, however, were not attacked by Dendroctonus, but had been infested by great num- bers of round-headed bark and wood borers of the genus Tetropium. On June 8 more hack-girdled and peeled spruce were examined near Rump Pond Camp, which had been infested with Polygraphus and other insects, but not with Dendroctonus. REPORT ON GIRDLING EXPERIMENTS BY MR. AUSTIN GARY. A number of spruce trees were girdled on Maj' 29 and June lo in the vicinity of Wight's cuttings on Twin Brook; on June 6 near Hamel's Camp, on the Little Magalloway; and on June 16 near Big Island Pond, at the source of the Kennebago River. Upon the writer's return home, written instructions were sent to Mr. Cary regarding the girdling experiments and observations desirable for him to make on the hnbits and life history of the beetle. The different methods of gii'dling reconiinended Hre indicated in lig. 2. The satisfactory. 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 United States. Bureau of Entomology. Washington : G. P. O.
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Keywords: ., bookcentury1800, booksubjectentomology, booksubjectinsects, booky
