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DDT
(Encyclopedia)DDT or 2,2-bis(p-chlorophenyl)-1,1,1,-trichloroethane, chlorinated hydrocarbon compound used as an insecticide. First introduced during the 1940s, it killed insects that spread disease and fed on crop...Müller, Paul Hermann
(Encyclopedia)Müller, Paul Hermann mŭlˈər [key], 1899–1965, Swiss chemist, Ph.D. Univ. of Basel, 1925. He worked as a research scientist with J. R. Geigy A.G. in Basel, Switzerland. Muller won the 1948 Nobel...tropical medicine
(Encyclopedia)tropical medicine, study, diagnosis, treatment, and prevention of certain diseases prevalent in the tropics. The warmth and humidity of the tropics and the often unsanitary conditions under which so m...tsetse fly
(Encyclopedia)tsetse fly tsĕtˈsē [key], name for any of several bloodsucking African flies of the genus Glossina, and in the same family as the housefly. The larva of the tsetse fly develops inside the body of t...spraying
(Encyclopedia)spraying, horticultural practice of applying fungicides, insecticides, and herbicides, usually in solution, to plants. It may be accomplished by various means, e.g., the watering can, sprinkler attach...insecticides
(Encyclopedia)insecticides, chemical, biological, or other agents used to destroy insect pests; the term commonly refers to chemical agents only. The liabilities of chemical insecticides have encouraged interest ...pesticide
(Encyclopedia)pesticide, biological, physical, or chemical agent used to kill plants or animals that are harmful to people; in practice, the term pesticide is often applied only to chemical agents. Various pesticid...osprey
(Encyclopedia)osprey ŏsˈprē [key], common name for a fish-eating bird of prey found near water in most parts of the world. The osprey, or fish hawk, Pandion haliaetus, has brown upperparts and a grayish white he...Sierra Club
(Encyclopedia)Sierra Club, national organization in the United States dedicated to the preservation and expansion of the world's parks, wildlife, and wilderness areas. Founded (1892) in California by a group led by...organic farming
(Encyclopedia)organic farming, the practice of growing plants—especially for fruits and vegetables, but for ornamentals as well—without the use of synthetic pesticides, herbicides, and fertilizers, or of raisin...Browse by Subject
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