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Agent Blue;(CH3)2AsO.·OH, obtained by the oxidation of cacodyl, and having the properties of an exceedingly stable acid; is one of the "rainbow herbicides" that is known for its use by the United States during the Vietnam War. Killing rice was a military strategy from the very start of US military involvement in Vietnam. At first, US soldiers attempted to blow up rice paddies and rice stocks, using mortars and grenades. But grains of rice were far more durable than they understood, and were not easily destroyed. Every grain that survived was a seed, to be collected and planted again. In a report to the International War Crimes Tribunal (founded by Bertrand Russell) at the end of 1967, it was stated that: "The soldiers discovered that rice is one of the most maddeningly difficult substances to destroy; using thermite metal grenades it is almost impossible to make it burn and, even if one succeeds in scattering the rice, this does not stop it being harvested by patient men. So they went to a bigger and better option that will actually kill off the paddies. The purpose of Agent Blue was narrow-leaf plants and trees (grass, rice, bamboo, banana, etc.) "Operation Ranch Hand", was military code for spraying of herbicides from U.S. Air Force aircraft in Southeast Asia from 1962 through 1971. The widespread use of herbicides in Southeast Asia during the Vietnam War was a very unique military operation in that it was meant to kill the plants that provided cover. The continued use of Agent Blue, one of the “Rainbow Herbicides”, by the United States was primarily meant as an operation to take away the enemy’s advantage on the terrain as well as deprive them of the resources they gained from the plant life. Between 1962 and 1971, the US used an estimated 20 million gallons of herbicides as chemical weapons for "defoliation and crop destruction" which fell mostly on the forest of South Vietnam, but was eventually used in Laos as well to kill crops in order to deprive the Viet Cong and North Vietnamese troops of food. It was sprayed on rice paddies and other crops in an attempt to deprive the Viet Cong of the valuable crops the plants provided. Unable to control the Viet Minh's access to food supplies or their grassroots village support, the US military response was simple: If you can't control it, kill it. By starving the plants of water this would cause the enemies to starve because the plants were not able to obtain water to survive. Agent Blue is a mixture of two arsenic-containing compounds, sodium cacodylate and cacodylic acid. Agent Blue is chemically unrelated to the more infamous Agent Orange and other herbicides used during the war.
Agent Blue affects plants by causing them to dry out. As rice is highly dependent on water to live, using Agent Blue on these paddies can destroy an entire field and leave it unsuitable for further planting. This is why Agent Blue was also used where food was not a factor, but foliage was. The Viet Cong had an advantage while fighting in Vietnam because they were used to the abundance of plant life on the battlefield. The US found themselves at a disadvantage and decided that the best retaliation would be to take the Viet Cong's advantage away from them by removing their cover. Along roads, canals, railroads, and other transportation networks, Ranch Hand cleared several hundred yards using the herbicides to make ambushes more difficult for their enemies. In Laos, the herbicide removed the jungle canopy from the roads and trails used for infiltrating men and supplies, making them more vulnerable to attack from the air.
Approximately 19.6 million gallons of Agent Blue were used in Vietnam during the war, destroying 500,000 acres (Script error km2) of crops. From 1965 on the Ansul Chemical Company delivered the herbicide Phytar 560 with the 26.4% sodium cacodylate and 4.7% cacodylic acid in water.
Today, large quantities of the chemical named Agent Blue are still used on lawns and crops throughout the USA. Taken from ZNet Ecology :. It has been over twelve years since the last herbicide mission that was done. But there is still big controversy going around about the past missions that were sent out. Agent Blue and White are the least effective of all the herbicides.
|“||Arsenical herbicides containing cacodylic acid as an active ingredient are still used today as weed-killers. In the US they are used extensively, from golf courses to backyards. They are also sprayed on cotton fields, drying out the cotton plants before harvesting. So common -- and so profitable -- is the original commercial form of Agent Blue that it was among 10 toxic insecticides, fungicides and herbicides partially deregulated by the US Environmental Protection Agency (EPA) in February 2004. Specific limits on toxic residues in meat, milk, poultry, and eggs were removed.||”|