. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges;. Insects; Pests. THE INSECT WORLD. 375 trees. Some forms live in blackberry and raspberry canes, others in grasses ; I have taken a species from alder, and in fact a very large number of plants are infested by these boring Hymenoptera. The largest of our species is the '' pigeon Tre- mex," T. coluniba, the larva of which attacks quite a consider- FiG. Pigeon Tremex, T. columba.—a, larva, with young larva of Thalessa fastened to its side; b, its head ; c, d, fem
. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges;. Insects; Pests. THE INSECT WORLD. 375 trees. Some forms live in blackberry and raspberry canes, others in grasses ; I have taken a species from alder, and in fact a very large number of plants are infested by these boring Hymenoptera. The largest of our species is the '' pigeon Tre- mex," T. coluniba, the larva of which attacks quite a consider- FiG. Pigeon Tremex, T. columba.—a, larva, with young larva of Thalessa fastened to its side; b, its head ; c, d, female and male pupae ; e, female. able variety of trees, including maple, elm, hickory, and beech, and bores into the solid wood, usually when the tree is beginning to die, or is even dead, but not decayed. Dealing with these insects is always rather a difficult matter, because we have no means of getting into the infested plants with insecticides. We are again rediiced to farm practice, and must arrange our methods of cultivation in such a way as to reach and destroy the insects by depriving them of food. Thus, with the Phvlloeciis infesting blackberry, if the canes are topped about midsummer, or a little before, the larvae never mature, because. 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 Smith, John Bernhard, 1858-1912. Philadelphia and London : J. B. Lippincott co.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1906
