During the past two years, slightly more than 50 percent of all pesticide registered by the EPA resulted from IR-4 submissions. (USDA)
Interregional Project 4 (IR-4) web site - This is the National Program site located at Rutgers University.
IR-4 is the "minor use pesticides" program. It is a federal cooperative program established in 1963 to help the producers of minor crops obtain clearances for pest control materials on minor crops. The purpose of IR-4 is to work with farmers, agriculture scientists and Extension personnel to carry out research and petition the Environmental Protection Agency (EPA) in order to obtain tolerances for specific pesticide uses needed by minor crop producers. IR-4 is the principal public effort to gain EPA-approved tolerances for safe and effective pest control products on specialty food crops such as fruits, vegetables, herbs, and others.