. Elementary biology; an introduction to the science of life. Biology. CHAPTER LXXVI INSECTS AND OTHER ORGANISMS 448. Insects and useful plants. From the time when men first began to cultivate plants for their own use, insects of one kind or another have caused parts of each year's work to be w^asted. There are early records of the destruction caused by locusts, and this name has come to be applied to many varieties of insects that move in hordes. One of the plagues of Egypt was a swarm of locusts, insects which are referred to in the Bible repeatedly. The first effort in this country to aid a

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. Elementary biology; an introduction to the science of life. Biology. CHAPTER LXXVI INSECTS AND OTHER ORGANISMS 448. Insects and useful plants. From the time when men first began to cultivate plants for their own use, insects of one kind or another have caused parts of each year's work to be w^asted. There are early records of the destruction caused by locusts, and this name has come to be applied to many varieties of insects that move in hordes. One of the plagues of Egypt was a swarm of locusts, insects which are referred to in the Bible repeatedly. The first effort in this country to aid a
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Image ID: RD2NHM
. Elementary biology; an introduction to the science of life. Biology. CHAPTER LXXVI INSECTS AND OTHER ORGANISMS 448. Insects and useful plants. From the time when men first began to cultivate plants for their own use, insects of one kind or another have caused parts of each year's work to be w^asted. There are early records of the destruction caused by locusts, and this name has come to be applied to many varieties of insects that move in hordes. One of the plagues of Egypt was a swarm of locusts, insects which are referred to in the Bible repeatedly. The first effort in this country to aid agriculture by means of an ofhcial investigation of in-. ''///,, / Fig. 2iS. The potato beetle [Le^tinotarsa decemlbicaia). (Slightly reduced) There are two or three broods a year. The full-grown larva crawls into the ground, where pupation takes place. The winter is passed underground in the adult stage. The tachina fly, shown in the center, is one of the most impor- tant enemies of the potato beetle. The fly lays eggs in the larva of the beetle, and the maggots destroy their host sect ravages was made in the seven- ties, when an outbreak of this pest did damage over an area of about two million square miles west of the Mississippi River. Since then the federal government and the various states have kept up systematic work through experiment stations or special 417. 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 work.. Gruenberg, Benjamin C. (Benjamin Charles), 1875-1965. Boston New York [etc. ] Ginn and company

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