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David Pimentel, Lori McLaughlin, Andrew Zepp, Benyamin Lakitan, Tamara Kraus, Peter Kleinman, Fabius Vancini, W. John Roach, Ellen Graap, William S. Keeton, and Gabe Selig everal studies suggest that it is technologically feasible to re-duce pesticide use in the United States 35 to 50% without reducing crop yields (NAS 1989, OTA 1979). Denmark developed an action plan in 1985 to reduce pesticide use by 50% before 1997.1 Sweden also approved a program in 1988 to reduce pesticide use by 50% within 5 years (NBA 1988). The Netherlands is developing a program to reduce pesticide use 50% in 10 years. 2 These proposals, along with the conclusion by Huffaker (1980) that the United States overuses pesticides, prompted us to investigate the feasibility of reducing the US annual use of synthetic organic pesticides by approximately one-half. Farmers use an estimated 320 mil-lion kg (700 million lb) of …