This chapter reviews environmental indicators used so far in the policy field of pesticide impacts. It is argued that risk aspects and the quantity of pesticides should both play a role in the identification of indicators. A principal component analysis is applied to derive a weighted indicator from several independent basic indicators.
Oskam, A. J., & Vijftigschild, R. (1999). Towards Environmental Pressure Indicators for Pesticide Impacts. In F. Brouwer, & B. Crabtree (Eds.), Environmental indicators and agricultural policy (pp. 157-176). CABI. https://doi.org/10.1079/9780851992891.0157