Historical Marker

Site of Animal Health Discovery

Historical marker location:
2700 Fredericksburg Rd., Kerrville, Texas
( 2700 Fredericksburg Road, Kerrville - on property of the USDA Knipling-Bushland Research Center)
Marker installed: 1972

In this building (at Menard) during late 1930s, Dr. Edward F. Knipling (b. 1909) advanced theory screwworms might be eradicated by releasing sterile male flies to break chain of reproduction and save livestock from role of host to parasitic larvae that destroy livestock and wildlife. During 1950-51, this laboratory (removed to Kerrville area) was site of sterilization of male screwworms with irradiation, in procedures by Dr. R. C. Bushland and D. E. Hopkins. The outcome: eradication of the screwworm and saving of domestic and wild animals of the United States. (1972).