RT Book, Section A1 O’Malley, Michael A2 LaDou, Joseph A2 Harrison, Robert J. SR Print(0) ID 1180881200 T1 Pesticides T2 CURRENT Diagnosis & Treatment: Occupational & Environmental Medicine, 6e YR 2021 FD 2021 PB McGraw Hill PP New York, NY SN 9781260143430 LK accessmedicine.mhmedical.com/content.aspx?aid=1180881200 RD 2024/09/17 AB Pesticides include chemicals, as well as biological and physical agents, used to control a diverse array of pests. The products used have evolved since the 1930s when arsenic was the principal insecticide used. During and after World War II (WWII), organochlorines and cholinesterase inhibitors supplanted many common uses of arsenic, along with the use of synthetic pyrethrins (pyrethroids). Pesticides currently registered in the United States include 1055 active ingredients formulated into 13,413 separate products.