A quarter of the total UK landmass (6,000,000 ha) received annual treatment with insecticides between 1990 and 2003. The overall weight of active ingredients used has declined due to newer compounds with greater intrinsic insecticidal activity.
Source: Devine GJ and Furlong MJ (2007) Agriculture and Human Values 24: 281-306
http://www.bio-nica.info/biblioteca/Devine2007Ecotoxicology.pdf
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