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The M115 anti-crop bomb, also known as the feather bomb or the E73 bomb,[1] was a U.S. biological cluster bomb designed to deliver wheat stem rust.

Contents

History

Mass production of the M115 bomb began in 1953.[2] The weapon was a modified M16A1 cluster bomb, which was normally used to distribute airborne leaflet propaganda or fragmentation weapons.[3] The U.S. Air Force first pointed out the need for an anti-crop weapon in September 1947. In October 1950 the Air Force began procuring 4,800 M115 bombs.[1] By 1954, with the biological agents causing wheat and rye rust standardized in laboratory culture, the U.S. Air Force prepared to transfer the agent to some 4,800 of the M115s.[4] The deployment of the M115 represented the United States' first, though limited, anti-crop biological warfare (BW) capability.[4] Though the weapon was tested at Fort Detrick, in Frederick, Maryland, it was never used in combat.[5]

Specifications

The M115 was a 500-pound bomb that was converted from a leaflet bomb and to be used to deliver wheat stem rust.[2][6] Wheat stem rust culture consisted of a dry particulate matter which was adhered to a light-weight vector, usually feathers. Because of its method of dissemination, the bomb was commonly referred to as the "feather bomb".[2] The feathers would fall over a wide area when released.[5] The M115 was shown to establish 100,000 foci of infection over a 50-square mile area.[4]

Tests involving the M115

According to a 1950 military report the M115 was tested in an area eleven miles long and 1.5 miles wide. The area consisted of 15 half-acre plots sown with the Overland variety of oats, susceptible to the test agent, Puccinia graminis avenae, but not to other strains of cereal rust.[3] The test drops of the M115 showed that, from an altitude of 4,000 feet, feathers could be spread over an area of 12 square miles. Three M115 feather bombs were dropped one mile upwind from the target area, which was then monitored for any changes. Estimates showed about a 30 percent reduction in yield from the infected area.[3]

See also

References

  1. ^ a b Wheelis, Mark, et al. Deadly Cultures: Biological Weapons Since 1945, (Google Books), Harvard University Press, 2006, pp. 217-18, (ISBN 0674016998).
  2. ^ a b c Smart, Jeffery K. Medical Aspects of Chemical and Biological Warfare: Chapter 2 - History of Chemical and Biological Warfare: An American Perspective, (PDF: p. 51), Borden Institute, Textbooks of Military Medicine, PDF via Maxwell-Gunter Air Force Base, accessed November 16, 2008.
  3. ^ a b c Russell, Alan and Vogler, John. The International Politics of Biotechnology: Investigating Global Futures, (Google Books), Manchester University Press, 2000, pp. 173-74, (ISBN 0719058686).
  4. ^ a b c Whitby, Simon M. Biological Warfare Against Crops, (Google Books), Macmillan, 2002, pp. 156-57, (ISBN 0333920856).
  5. ^ Endicott, Stephen and Hagerman, Edward. "United States Biological Warfare during the Korean War: rhetoric and reality" York University, June 2002, accessed November 16, 2008.







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