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U.S. Army Huey helicopter spraying Agent Orange over agricultural land during the Vietnam War

A defoliant is any chemical sprayed or dusted on plants to cause their leaves to fall off. It is sometimes used in warfare as a means to deprive an enemy of food crops


A classic example of a highly toxic defoliant is Agent Orange, which the British military used abundantly to defoliate regions of Malaya starting in the early 1950s[when?] during the Malayan Emergency of 1948–60, and the U.S. military to defoliate regions of Vietnam from 1961 to 1971 during the Vietnam War of 1955–75.[1][2]


Defoliants differ from herbicides in that the former seek mainly to strip leaves from plants, but the latter are used to destroy or inhibit the growth of certain plants.

Defoliants are used in cotton production to aid harvesting.[3]

See also


  1. ^ Tow Fawthrop (June 14, 2004). "Vietnam's war against Agent Orange". 
  2. ^ "Agent Orange Linked To Skin Cancer Risk". Science 2.0. Retrieved 17 September 2014. 
  3. ^ Gwathmey, C.O.; Craig Jr., C.C. (2007). "Defoliants for cotton". In David Pimentel. Encyclopedia of Pest Management. 2. CRC Press. p. 135. ISBN 1-4200-5361-2. 

External links

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