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Mortality and Cholinesterase Inhibition in Butterflies Following Aerial Naled Applications for Mosquito Control on the National Key Deer Refuge.
Arch Environ Contam Toxicol. 2020 Aug; 79(2):233-245.AE

Abstract

Natural resource managers are concerned about the impacts of aerial ultra-low volume spray (ULV) of insecticides for mosquito control (i.e., mosquito adulticides) and seek science-driven management recommendations that reduce risk but allow vector control for nearby human populations. Managers at the National Key Deer Refuge (Florida Keys, FL) are concerned for ULV effects upon conservation efforts for imperiled butterflies (Florida leafwing [Anaea troglodyta floridalis] and Bartram's hairstreak [Strymon acis bartrami] butterflies). No-spray zones were designated for protection of those butterflies, but their effectiveness for mitigation is unclear. To address this uncertainty, cholinesterase activity (ChE) and mortality were monitored for caged butterflies gulf fritillary [Agraulis vanilla] and great southern white [Ascia monuste]) deployed on the Refuge during three aerial ULV applications of the insecticide naled. Residue samplers also were deployed to estimate butterfly exposure. Spray efficacy against mosquitoes was assessed by deploying caged mosquitoes at the same locations as the butterflies. Average naled residue levels on filter paper samplers in the target area (1882-2898 µg/m2) was significantly greater than in the no-spray zone (9-1562 µg/m2). Differences between the no-spray zone and target area for butterfly mortality and ChE were inconsistent. Average mortality was significantly lower, and average ChE was significantly higher in the no-spray zone for larvae of one species but not for larvae of the other species. Mosquito mortality did not differ significantly between the two areas. Data from the present study reflect the inconsistent effectiveness of no-spray zones on the Refuge using standard methods employed at the time by the vector control agency in the Florida Keys and possibly by other vector control agencies in similar coastal environments. Furthermore, these findings helped to guide the design and to improve the conservation value of future no-spray zone delineations while allowing for treatment in areas where mosquito control is necessary for vector-borne disease reduction.

Authors+Show Affiliations

Wetland and Aquatic Research Center, U.S. Geological Survey, 7920 NW 71st Street, Gainesville, FL, 32653, USA. tbargar@usgs.gov.Florida Natural Areas Inventory, 1018 Thomasville Road, Suite 200-C, Tallahassee, FL, USA.Georgia Ecological Services Coastal Georgia Sub Office, U.S. Fish and Wildlife Service, 4980 Wildlife Drive NE, Townsend, GA, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32613299

Citation

Bargar, Timothy A., et al. "Mortality and Cholinesterase Inhibition in Butterflies Following Aerial Naled Applications for Mosquito Control On the National Key Deer Refuge." Archives of Environmental Contamination and Toxicology, vol. 79, no. 2, 2020, pp. 233-245.
Bargar TA, Anderson C, Sowers A. Mortality and Cholinesterase Inhibition in Butterflies Following Aerial Naled Applications for Mosquito Control on the National Key Deer Refuge. Arch Environ Contam Toxicol. 2020;79(2):233-245.
Bargar, T. A., Anderson, C., & Sowers, A. (2020). Mortality and Cholinesterase Inhibition in Butterflies Following Aerial Naled Applications for Mosquito Control on the National Key Deer Refuge. Archives of Environmental Contamination and Toxicology, 79(2), 233-245. https://doi.org/10.1007/s00244-020-00745-8
Bargar TA, Anderson C, Sowers A. Mortality and Cholinesterase Inhibition in Butterflies Following Aerial Naled Applications for Mosquito Control On the National Key Deer Refuge. Arch Environ Contam Toxicol. 2020;79(2):233-245. PubMed PMID: 32613299.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mortality and Cholinesterase Inhibition in Butterflies Following Aerial Naled Applications for Mosquito Control on the National Key Deer Refuge. AU - Bargar,Timothy A, AU - Anderson,Chad, AU - Sowers,Anthony, Y1 - 2020/07/01/ PY - 2020/03/02/received PY - 2020/06/01/accepted PY - 2020/7/3/pubmed PY - 2020/7/3/medline PY - 2020/7/3/entrez SP - 233 EP - 245 JF - Archives of environmental contamination and toxicology JO - Arch. Environ. Contam. Toxicol. VL - 79 IS - 2 N2 - Natural resource managers are concerned about the impacts of aerial ultra-low volume spray (ULV) of insecticides for mosquito control (i.e., mosquito adulticides) and seek science-driven management recommendations that reduce risk but allow vector control for nearby human populations. Managers at the National Key Deer Refuge (Florida Keys, FL) are concerned for ULV effects upon conservation efforts for imperiled butterflies (Florida leafwing [Anaea troglodyta floridalis] and Bartram's hairstreak [Strymon acis bartrami] butterflies). No-spray zones were designated for protection of those butterflies, but their effectiveness for mitigation is unclear. To address this uncertainty, cholinesterase activity (ChE) and mortality were monitored for caged butterflies gulf fritillary [Agraulis vanilla] and great southern white [Ascia monuste]) deployed on the Refuge during three aerial ULV applications of the insecticide naled. Residue samplers also were deployed to estimate butterfly exposure. Spray efficacy against mosquitoes was assessed by deploying caged mosquitoes at the same locations as the butterflies. Average naled residue levels on filter paper samplers in the target area (1882-2898 µg/m2) was significantly greater than in the no-spray zone (9-1562 µg/m2). Differences between the no-spray zone and target area for butterfly mortality and ChE were inconsistent. Average mortality was significantly lower, and average ChE was significantly higher in the no-spray zone for larvae of one species but not for larvae of the other species. Mosquito mortality did not differ significantly between the two areas. Data from the present study reflect the inconsistent effectiveness of no-spray zones on the Refuge using standard methods employed at the time by the vector control agency in the Florida Keys and possibly by other vector control agencies in similar coastal environments. Furthermore, these findings helped to guide the design and to improve the conservation value of future no-spray zone delineations while allowing for treatment in areas where mosquito control is necessary for vector-borne disease reduction. SN - 1432-0703 UR - https://www.unboundmedicine.com/medline/citation/32613299/Mortality_and_Cholinesterase_Inhibition_in_Butterflies_Following_Aerial_Naled_Applications_for_Mosquito_Control_on_the_National_Key_Deer_Refuge L2 - https://dx.doi.org/10.1007/s00244-020-00745-8 DB - PRIME DP - Unbound Medicine ER -
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