"In 2011, opium prices had reached high levels as a result of the unusually low opium production in 2010, when major cultivation areas were affected by plant diseases.
"Results from the 2009 opium survey indicated that the low opium price level in that year discouraged farmers from planting opium. However, since then, opium prices have tripled. The high sale price of opium in combination with lower wheat prices may have encouraged famers to resume opium cultivation. The high level of opium prices in 2011 continues to provide a strong incentive to plant opium in the upcoming poppy season."
"Afghanistan Opium Survey 2011," United Nations Office on Drugs and Crime (Vienna, Austria: United Nations, October 2011), p. 19.