Tamarisk biological control began in the 1970s with the study of potential control insects by USDA-ARS (United States Department of Agriculture – Agricultural Research Service). Quarantine testing of insects began in 1992. Approval to begin field testing was given in 1999 and the beetles were released in outdoor cages in research areas at 10 sites in 6 states (CA, NV, UT, CO, WY & TX). In 2001, the beetles were released from the cages at these 10 sites.
In 2004, A.P.H.I.S (Animal and Plant Health Inspection Service, USDA) personnel opened the Delta, UT, site to the collection of the tamarisk beetles and larva for Utah agencies and organizations and subsequent release of collected beetles and larva within Utah. Beetles and larva could be moved and released on private and certain state lands (no federal lands). Individuals from Grand County, with knowledge of biological control, collected beetles and larva from the Delta site and distributed them to approved sites in Grand County, with two sites receiving two separate releases in 2004.