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Image from page 174 of "Elementary principles of agriculture; a text book for the common schools" (1915)

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説明Identifier: elementaryprinci01fergTitle: Elementary principles of agriculture; a text book for the common schoolsYear: 1915 (1910s)Authors: Ferguson, A. M. (Alexander McGowen), 1874- Lewis, Lowery Laymon, 1869- joint authorSubjects: AgriculturePublisher: Chicago, Ill., Ferguson Pub. CoContributing Library: The Library of CongressDigitizing Sponsor: Sloan FoundationView Book Page: Book ViewerAbout This Book: Catalog EntryView All Images: All Images From BookClick here to view book online to see this illustration in context in a browseable online version of this book.Text Appearing Before Image:ody, butinsects have the hard bony part on the outside. Themuscles of insects are attached to the outer body wall andnot to internal bones, as in other animals. Insects donot breathe through a mouth, but have little breathingpores along the sides of the body. The nerves of theinsect that detect odors and guide it to its kind and foodare usually in the Httle feelers, or antennce, or sometimesin the segments of the legs. Some species of insects die soon after laying eggs,often before the eggs hatch, as the tent caterpillar; others 158 Elementary Principles of Agriculture may live on through a longer period, laying eggs con-tinuously, as in the case of the cotton boll-weevil. 228. The Food of Insects. Insects are very pecuHarabout the food they eat. Just like the many species ofparasitic fungi, each species feeds, usually, on just onekind of plant or animal, or on closely related plants oranimals. In such cases we speak of the plant as thehost for a particular insect. The Colorado potatoText Appearing After Image:Fig. 96. Colorado potato beetle, a, eggs; b, larvae; c. mature beetle.After Riley. beetle (Fig. 96) is a native of the West, hving on thewestern species of nightshades. When the Irish potatowas introduced, it found a plant closely akin to its regularfood plants, and on which it thrives to such an extentthat it takes its name from the new host-plant. Some-times there is a wide difference in the kinship of the host-plants. The feeding habits of the boll-worm of cotton,or the ear-worm of corn, the same insect in both cases(Figs. 97 and 103), is a striking example of a form whichfeeds on a number of different kinds of plants. When Insects on the Farm 159 insects do not find acceptable food-plants they die.Many insects are exclusively flesh-eating, such as thecommon doodle-bugs/ wasps, lady-bugs, and manyspecies of wood ants. Mosquitos are a common formof blood-sucking insects. Many parasites are solelyresponsible for the spread of diseases. The ticks on cattle,which are somewhat related tNote About ImagesPlease 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 work.
撮影日1915-01-01 00:00:00
撮影者Internet Archive Book Images
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