Nontarget effects of the mosquito adulticide pyrethrin applied aerially during a West Nile virus outbreak in an urban California environment

Walter M Boyce, Sharon P. Lawler, Jennifer M. Schultz, Shannon J. McCauley, Lynn S. Kimsey, Michael K. Niemela, Carrie F. Nielsen, William Reisen

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

In August 2006, a Pyrethrin insecticide synergized with piperonyl butoxide (EverGreen® Crop Protection EC 60-6, McLaughlin Gormley King Company, Golden Valley, MN) was sprayed in ultra-low volumes over the city of Davis, CA, by the Sacramento-Yolo Mosquito and Vector Control District to control mosquitoes transmitting West Nile virus. Concurrently, we evaluated the impact of the insecticide on non target arthropods by 1) comparing mortality of treatment and control groups of sentinel arthropods, and 2) measuring the diversity and abundance of dead arthropods found on treatment and control tarps placed on the ground. We found no effect of spraying on nontarget sentinel species including dragonflies (Sympetrum corruptum), spiders (Argiope aurantia), butterflies (Colias eurytheme), and honeybees (Apis mellifera). In contrast, significantly higher diversity and numbers of nontarget arthropods were found on ground tarps placed in sprayed versus unsprayed areas. All of the dead nontarget species were small-bodied arthropods as opposed to the large-bodied sentinels that were not affected. The mortality of sentinel mosquitoes placed at the same sites as the nontarget sentinels and ground tarps ranged from 0% to 100%. Dead mosquitoes were not found on the ground tarps. We conclude that aerial spraying with Pyrethrins had no impact on the large-bodied arthropods placed in the spray zone, but did have a measurable impact on a wide range of small-bodied organisms.

Original languageEnglish (US)
Pages (from-to)335-339
Number of pages5
JournalJournal of the American Mosquito Control Association
Volume23
Issue number3
DOIs
StatePublished - Sep 2007

Fingerprint

adulticides
West Nile virus
Pyrethrins
Arthropods
pyrethrins
Culicidae
mosquito
arthropod
Disease Outbreaks
arthropods
Mosquito Control
mosquito control
Insecticides
spraying
insecticide
Argiope aurantia
Colias eurytheme
insecticides
Sympetrum
Odonata

Keywords

  • Nontarget mortality
  • Pyrethrins
  • Ultra-low volume adulticide

ASJC Scopus subject areas

  • Insect Science

Cite this

Nontarget effects of the mosquito adulticide pyrethrin applied aerially during a West Nile virus outbreak in an urban California environment. / Boyce, Walter M; Lawler, Sharon P.; Schultz, Jennifer M.; McCauley, Shannon J.; Kimsey, Lynn S.; Niemela, Michael K.; Nielsen, Carrie F.; Reisen, William.

In: Journal of the American Mosquito Control Association, Vol. 23, No. 3, 09.2007, p. 335-339.

Research output: Contribution to journalArticle

Boyce, Walter M ; Lawler, Sharon P. ; Schultz, Jennifer M. ; McCauley, Shannon J. ; Kimsey, Lynn S. ; Niemela, Michael K. ; Nielsen, Carrie F. ; Reisen, William. / Nontarget effects of the mosquito adulticide pyrethrin applied aerially during a West Nile virus outbreak in an urban California environment. In: Journal of the American Mosquito Control Association. 2007 ; Vol. 23, No. 3. pp. 335-339.
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