What is the Western Region IR-4 Program?

The Western Region IR-4 Project coordinates research trials to support pesticide registrations and non-conventional (biological and biopesticide) pest management technologies for specialty crops (food and environmental horticulture). These efforts are essential for delivering effective pest control tools to farmers.


This material is based upon work that is supported by the National Institute of Food and Agriculture, U.S. Department of Agriculture, under award number 2021-34383-34848 and award number 2022-79111-38469, with substantial cooperation and support from the State Agricultural Experiment Stations.  Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.