. The cultivated evergreens; a handbook of the coniferous and most important broad-leaved evergreens planted for ornament in the United States and Canada. Evergreens; Conifers. INSECTS, DISEASES, AND INJURIES 127 been added as a marker. It is also good practice to band the trunks with "tree tanglefoot" to prevent the ascent of mi- grating caterpillars. The white fine weevil {Pissodes strohi. Peck). Figs. 10, 11. White pine is subject to the attacks of a weevil which kills the central leader or topmost shoot, thus ruining the symmetry of the tree and caus- ing the trunk to be crooked
. The cultivated evergreens; a handbook of the coniferous and most important broad-leaved evergreens planted for ornament in the United States and Canada. Evergreens; Conifers. INSECTS, DISEASES, AND INJURIES 127 been added as a marker. It is also good practice to band the trunks with "tree tanglefoot" to prevent the ascent of mi- grating caterpillars. The white fine weevil {Pissodes strohi. Peck). Figs. 10, 11. White pine is subject to the attacks of a weevil which kills the central leader or topmost shoot, thus ruining the symmetry of the tree and caus- ing the trunk to be crooked and mis- shapen. The parent insect is a small brown snout beetle with a whitish spot near the hind end of each wing-cover. The beetles emerge from hibernation in May and, after feeding for a time on the terminal shoot, they deposit .1 • • 10. Work of the white pme weevil. then* eggs m punc- ^ tures in the twig. The eggs hatch in a few daj^s and the larvae burrow in all directions through the shoot, riddling the tissue and causing the death of the branch. The grubs become full grown in August and the beetles emerge in early fall and go into hibernation under trash and in similar sheltered places. There is only one generation a year. Much may be done to keep the weevils from injuring the pine leaders by spraying this part of the tree about May 1, before the new leaves appear, with lime-sulfur solution—one part in eight parts of water. This acts as a deterrent and. 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 Bailey, L. H. (Liberty Hyde), 1858-1954. New York, The Macmillan company; London, Macmillan & co. , ltd.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectconifer, bookyear1923
