Screwworm Information
New World screwworm (NWS) is a serious pest of livestock and wildlife.
This invasive pest we previously eradicated from the United States, but has recently been reintroduced (June 2026). Website links below provide information on screwworm, including prevention and treatment for screwworm. Treatment and prevention, as well as reporting requirements, often vary by state - contact animal health officials in your state for state-specific requirements and recommendations.
FEDERAL RESOURCES
STATE RESOURCES
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California Department of Food and Agriculture (CDFA)
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University of California at Riverside
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Florida Department of Agriculture & Consumer Services
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Texas Animal Health Commission
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Texas A&M Agrilife Extension
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New Mexico State University
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University of Tennessee
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Univeristy of Arkansas
COMMODITY GROUP RESOURCES
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AVMA
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NCBA
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Swine Health Information Center
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American Sheep Industry Association
Black Soldier Fly
The black soldier fly (Hermetia illucens) is a “wasp-like” in appearance fly that is naturally found in the western hemisphere but has since been distributed globally. Adults are black and can measure up to one inch in length. Similarly, the larvae can be quite large (one inch in length). Adults do not need to feed and are not attracted to homes and live for approximately two weeks. Larvae of this species are voracious feeders capable of consuming most organic wastes. In fact, the larvae can be harvested and in some instances used as a feed for select livestock, poultry, and aquaculture. The black soldier fly, if managed, is not a pest species. However, if colonization is not desired, its presence in animal waste in confined animal facilities can be challenging as resulting larvae can spill outside of the containment units making waste management challenging.




