The widespread infestation suggested that termites had been in the monument for several years before they were noticed in 1994 and were probably introduced during the restoration project in the mid-1980s.
Baits containing an insect growth regulator, hexaflumuron, were applied using above- and inground stations in mid-1996. By October 1997, all four infestations were eliminated after consuming a total of 1.8 g hexaflumuron. Monitoring stations remained in the soil to detect residual or new populations of subterranean termites on Liberty Island.
Related Products: 2002-09 New Termite Baiting Technologies for the Preservation of Cultural Resources: Results of Field Trials in the National Park System
2002-21 Control of Formosan Subterranean Termite Infestations Using Baits Containing an Insect Growth Regulator
2003-01 Control of Subterranean Termite Populations at San Cristobal and El Morro, San Juan National Historic Site
This research was made possible through Grant MT-0424-5-NC-23 from the National Center for Preservation Technology and Training (NCPTT).