. Adventures with animals and plants. Biology. 392 How Living Things Affect One Another unit vii t 1 *m%1 H '%=•? 1 Fig. 342 Damage to corn, done by the larvae of the European corn borer. It docs even greater da?iiage hi weaken'mg the stalks, (u. s. BUREAU OF entomology). Fig. 343 Caterpillars of the gypsy nioth moving tip a tree. What stops their progress? How do gypsy moth caterpillars harm trees? (u. s. de- PARTiMENT OF AGRICULTURE) * doing Exercises i and 2. Then let us see how this information is being put to practical use. How we fight the European corn borer. The European corn borer, wh
. Adventures with animals and plants. Biology. 392 How Living Things Affect One Another unit vii t 1 *m%1 H '%=•? 1 Fig. 342 Damage to corn, done by the larvae of the European corn borer. It docs even greater da?iiage hi weaken'mg the stalks, (u. s. BUREAU OF entomology). Fig. 343 Caterpillars of the gypsy nioth moving tip a tree. What stops their progress? How do gypsy moth caterpillars harm trees? (u. s. de- PARTiMENT OF AGRICULTURE) * doing Exercises i and 2. Then let us see how this information is being put to practical use. How we fight the European corn borer. The European corn borer, which has been in our country for only about twenty-five years, has spread through many states. It causes much damage in moist years, usually less damage in dry years. The small moths are good fliers and they spread rapidly. The moth lays its eggs on the leaves of the corn or on some of the commonest ^^'ecds. The small larvae feed on the outside of the plant for a few days and then enter the ear (Figure 342) or the stalk within which they spend the winter. It is un- usual for larvae to live through the win- ter; in most insects it is the pupa which winters over. These larvae spin cocoons and soon after come out as adults. You can see that one method of control might be that of destroying the stalks after har- vest but before the moths emerge in the spring. This is only partially successful because it has not been possible to de- stroy all the cornstalks and the M^eeds which may contain larvae. To find out about the most harmful insects in your neighborhood do Exercise 3. Catching the chinch bug and the gypsv moth. The chinch bug is a tiny insect with sucking mouth parts. It is less than a quarter of an inch long, yet it multi-. 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, W
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