. Agriculture, its fundamental principles. Agriculture. 214 AGRICULTURE Beetles. — Beetles have four wings. The fore wings, called sheath wings, are hard and often bright-colored; the thin hind ones are kept folded under the sheath wings'. Beetles are often injurious in the imago as well as in the larva form. Colorado Potato Beetle. —This is the case with the Colorado potato beetle. It was an invasion of this insect that brought about the use of Paris green as an in- secticide, which has saved mil- lions of dollars' worth of crops. The potato beetle is a native of the Rocky ^Mountains. There,
. Agriculture, its fundamental principles. Agriculture. 214 AGRICULTURE Beetles. — Beetles have four wings. The fore wings, called sheath wings, are hard and often bright-colored; the thin hind ones are kept folded under the sheath wings'. Beetles are often injurious in the imago as well as in the larva form. Colorado Potato Beetle. —This is the case with the Colorado potato beetle. It was an invasion of this insect that brought about the use of Paris green as an in- secticide, which has saved mil- lions of dollars' worth of crops. The potato beetle is a native of the Rocky ^Mountains. There, it feeds on weeds of the nightshade family, to which the potato be- longs. Within thirty years, it has extended its home to most parts of the United States. The black-and-yellow beetle winters in the ground. It comes out in the spring and feeds rav- enously on the potato, horse nettle, and eggplant. The female deposits its little yellow eggs — six hundred to a thousand in number — in patches on the under side of the leaves. These eggs hatch in a few clays into slug-like larvae. The beetles are hungry, but the larvae are ravenous. They feed greedily for four or five weeks, then enter the ground and come forth in a few days as beetles. There are three or four broods every season. To stop the ravages of beetles, hand picking is used to some ex- tent, but poison is the best remedy. The farmer is aided in the work by some birds, especially crows, by ladybird beetles, and by. Colorado Potato Beetle Beetle, larva, and eggs are shown on this spray of a potato 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 Soule, Andrew MacNairn. [from old catalog]; Turpin, Edna Henry Lee, 1867-1952, joint author. Richmond, Atlanta [etc. ] B. F. Johnson publishing company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectagriculture, bookyear
