. Adventures with animals and plants. Biology. Fig. 338 Ma?2y kinds of in- sects injure trees. A piece of bark has been raised to show the timnels of the pine beetle. The eggs are laid in tbein. Why does this tiinneliiT^ in- jure the tree? (u, s. forest service) Fig. 339 The hmimn head lotise. The lines are Iminan hairs. Closely related species attack dogs, goats, aiid other animals, and do ?>mch harm. (U. S. BUREAU OF ENTO- MOLOGY) Fig. 340 The boll weevil lays its eggs in a cot- tonboll. See text, page 389. (u. s. bure.\u of entomology) such insects are as important to them as to the farm
. Adventures with animals and plants. Biology. Fig. 338 Ma?2y kinds of in- sects injure trees. A piece of bark has been raised to show the timnels of the pine beetle. The eggs are laid in tbein. Why does this tiinneliiT^ in- jure the tree? (u, s. forest service) Fig. 339 The hmimn head lotise. The lines are Iminan hairs. Closely related species attack dogs, goats, aiid other animals, and do ?>mch harm. (U. S. BUREAU OF ENTO- MOLOGY) Fig. 340 The boll weevil lays its eggs in a cot- tonboll. See text, page 389. (u. s. bure.\u of entomology) such insects are as important to them as to the farmer. No matter where we hve we all pay higher prices for many kinds of foods because of insect damage. Most farmers know how this comes about. The city boy or girl ought to know, too, so that the farmer's problem may be understood by all. The farmer raises potatoes for sale in the market. He puts in a certain amount of labor on this acre of potatoes and spends money for fertilizer, farm implements, and so on. If the Colorado potato beetle injures. 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 Kroeber, Elsbeth, 1882-; Wolff, Walter Harold, 1901-. Boston : D. C. Heath
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Keywords: ., bookcentury1900, bookpublisherbostondcheath, booksubjectbiology
