| Abstract from DBPedia | A defoliant is any herbicidal chemical sprayed or dusted on plants to cause their leaves to fall off. Defoliants are widely used for the selective removal of weeds in managing croplands and lawns. Worldwide use of defoliants, along with the development of other herbicides and pesticides, allowed for the Green Revolution, an increase in agricultural production in mid-20th century. Defoliants have also been used in warfare as a means to deprive an enemy of food crops and/or hiding cover, most notably by the United Kingdom during the Malayan Emergency and the United States in the Vietnam War. Defoliants were also used by Indonesian forces in various internal security operations.枯葉剤（かれはざい）は、除草剤の一種。アメリカの植物学者、によって発明された。その後モンサントによって量産され、化学兵器として軍事利用された。ちなみに、ベトナム戦争で撒布された枯葉剤はダイオキシン類の一種2,3,7,8-テトラクロロジベンゾ-1,4-ジオキシン（TCDD）を高い濃度で含んだものであり、通称オレンジ剤とも呼ばれている。 (Source: http://dbpedia.org/resource/Defoliant) |
