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Rainbow Herbicides
The Rainbow Herbicides are a group of "tactical use" chemicals used by the United States military in Southeast Asia during the Vietnam War. Success with Project AGILE field tests with herbicides in South Vietnam in 1961 and inspiration by the British use of herbicides and defoliants during the Malayan Emergency in the 1950s led to the formal herbicidal program Trail Dust (1961–71). Herbicidal warfare is the use of substances primarily designed to destroy the plant-based ecosystem of an agricultural food production and/or destroying foliage which provides the enemy cover.
== Background ==
The United States discovered 2,4-D (2,4-dichlorophenoxyacetic acid) during World War II. It was recognized as toxic and combined with large amounts of water or oil to function as a weed-killer. Army experiments with the chemical eventually led to the discovery that 2,4-D combined with 2,4,5-T (2,4,5-trichlorophenoxyacetic acid) yielded a more potent herbicide.〔Ornitz, Sheri L. "(Agent Orange and its Continuing Effects )". ''British Travel Health Association Journal'', vol. 10. Winter 2007.〕 It was found that 2,4,5-T was contaminated with 2,3,7,8-Tetrachlorodibenzodioxin (TCDD) or "Dioxin". Young found that samples of 2,4,5-T in Agents Pink and Green had double the TCDD dioxin concentration of Agents Purple or Orange.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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