Economic entomology for the farmer Economic entomology for the farmer and fruit-grower [microform] : and for use as a text-book in agricultural schools and colleges . economicentomolo00insmit Year: 1896 THE INSECT WORLD. 139 beyond it, and ready to break in the first high wind. On old or large trees the insects are rarely dangerous, because their injury results in only a little pruning, but on young trees they may cause deformities ; hence, if the insects are noticed in a young orchard, it will be advisable to go over it carefully during the winter, to trim out all infested twigs or branches,
Economic entomology for the farmer Economic entomology for the farmer and fruit-grower [microform] : and for use as a text-book in agricultural schools and colleges . economicentomolo00insmit Year: 1896 THE INSECT WORLD. 139 beyond it, and ready to break in the first high wind. On old or large trees the insects are rarely dangerous, because their injury results in only a little pruning, but on young trees they may cause deformities ; hence, if the insects are noticed in a young orchard, it will be advisable to go over it carefully during the winter, to trim out all infested twigs or branches, burning the Fig. 100. Buffalo tree-hopper, Ceresa biibalus.—a, adult; 5, c, d, tarsus, antenna, and wing- f,g, tip of abdomen, showing ovipositor. cuttings to destroy the eggs. Active insecticide applications are hardly indicated. Next come the cicadas, or 'harvest-flies,' often miscalled locusts, and the largest of the Homoptera. They are easily known by their broad, transparent wings, the large head with prominent eyes set on each side, and by their intensely shrill, loud song, which during midsummer forms one of the common sounds of the country. The author of this concert is the 'dog-day harvest-fly,' greenish in color, more or less marked with black. The noise is produced by an elaborate drumming and resonating structure on the under side of the thorax and abdomen of the
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