Insects Affecting:
Insects vary greatly in size and shape. The smallest insects are the tiny fairy flies, which
are less than Ymo of an inch (0.025 mm) long and develop inside the eggs of other insects. The largest living insects are the stick insects,which may be 10 inches (25.4 cm) long, and the giant moths, which have a wingspan of 10 inches. Some insects, such as the walking stick, have greatly elongated bodies. Other insects, such as many of the beetles, have flattened and rounded bodies.OSBORN, Herbert, American entomologist: b. Lafayette, Wis., March 19, 1856; d. Columbus, Ohio, Sept. 20, 1954. He was state entomologist of Iowa in 1898 and then taught zoology and en¬tomology at Ohio State University until his re¬tirement in 1933. His most important publications included Pcdiculi and Mallophaga of Man and Lower Animals (1891), Insects Affecting Domes¬tic Animals (1896), The Genus Scaphoideus (1900), Economic Zoology (1908), Agricultural Entomology, Leaf hoppers of Ohio (1928), and Meadow and Pasture Insects (1939).
See Also Types Insects Two:
Insects. Insects are cooked and eaten in many parts of the world. Grasshoppers, beetles, crick¬ets, locusts, caterpillars, termites, and ants are among the few types insects two of insects that are con¬sumed. Bee larvae and butterfly pupae are also eaten. The only insect product eaten by man is honey, which is produced by honeybees. This sweet liquid is rich in carbohydrates.Other Chemicals. In addition to insecticides other types insects two of chemicals are used for controlling insects and related pests. Some chemicals, known as chemosterilants, are used to sterilize in¬sects so that they cannot reproduce. Chemical attractants are used as bait in certain types insects two of insect traps, and chemical repellents are useful for driving pests away from limited areas. The use of tranquilizers, such as reserpine, is another method that has been successfully used to reduce the number of eggs laid by female insects.
On The Other Hand See Primarily Insects:
The ganglia of the abdomen are relatively in¬dependent of each other and of the ganglia of the head and thorax. For example, a male pray¬ing mantis may continue to copulate with the hind end of his abdomen while his head is being eaten off by his mate. Blood and Circulation. The blood of insects is primarily insects concerned with distributing food mole¬cules to the body cells and removing their metabolic wastes. In many insects the blood is yellowish or greenish, but in the larvae of midges and a few other insects the blood is red because it contains the oxygen-carrying pigment hemo¬globin. In these insects the blood also serves to carry oxygen to the body cells.Thus, insects that feed primarily insects on in cannot thrive in many regions because in is not a widely distributed wild plant, but, •gions where cotton has become a major ag-tural crop, populations of these insects have •n tremendously because of the abundance eir major source of food, nsect control is not a recent practice. The mt Greeks and Romans used sulfur and • substances to rid their crops of insect pests, the Chinese used arsenic sulfide to control r plant-eating insects. Today there are five methods that are widely used for destroying or controlling insects and related pests: chemical, physical and mechanical, biophysical, cultural, and biological controls. Sometimes, two or more of these methods are combined to form a type of control known as integrated control.
