Item talk:Q302554
From geokb
{
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"name": "Field trials to test new trap technologies for monitoring Culex populations and the efficacy of the biopesticide formulation VectoMax\u00ae FG for control of larval Culex quinquefasciatus in the Alaka'i Plateau, Kaua'i, Hawaii",
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"value": "70218672",
"url": "https://pubs.usgs.gov/publication/70218672"
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"name": "Hawaii Cooperative Studies Unit Technical Report Series"
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"datePublished": "2021",
"dateModified": "2021-03-04",
"abstract": "Mosquito-borne avian malaria Plasmodium relictum is a key limiting factor for endemic Hawaiian forest birds. In the past decade, populations of Kaua\u2018i\u2019s endemic forest birds have been in a steep decline due to an increase in malaria transmission. To evaluate the use of available biopesticides for short-term mosquito control we tested the efficacy of the biopesticide VectoMax\u00ae FG against Culex quinquefasciatus larvae in naturally occurring perched stream pools, seeps, and ground pools in forest bird habitat in Kaua\u2018i\u2019s remote Alaka\u2018i Plateau. We also tested the efficacy of conventional and newer traps and attractants for the capture of adult Culex quinquefasciatus in Hawaiian rain forests and monitored adult mosquito populations at the Kaua\u2018i field site. During field trials conducted on Hawai\u2018i Island we captured more Culex quinquefasciatus in gravid traps than in host-seeking traps. Among the host-seeking traps, Biogents BG-Sentinel 2 traps baited with CO2 and BG-Lure caught more Culex quinquefasciatus and Aedes japonicus japonicus than CDC (Centers for Disease Control and Prevention) traps baited with compressed CO2, CDC traps baited with dry ice, or Biogents BG-Sentinel 2 traps baited with BG-Lure and octenol but not CO2. Both Biogents BG-Sentinel 2 and CDC miniature traps baited with compressed CO2 or dry ice captured significantly more Culex quinquefasciatus than Biogents BG-Sentinel 2 traps baited with octenol and BG-Lure but without CO2. We also found that gravid traps baited with timothy hay infusions caught significantly more Culex quinquefasciatus than traps baited with either a commercial gravid mosquito attractant or an infusion made with pelleted rabbit feed. Traps baited with an infusion of timothy hay and donkey dung were the most effective for Culex quinquefasciatus. On Kaua\u2018i, we operated Biogents BG-Sentinel 2 traps baited with CO2 and gravid traps and captured 29 mosquitoes in 182 trap-nights from October\u2013November 2016 and 126 mosquitoes in 254 trap-nights from September\u2013October 2017. Contrary to our findings on Hawai\u2018i Island, most mosquitoes (96%) were captured in Biogents BG-Sentinel 2 traps indicating considerable site-to-site variability in trap efficacy. Weekly adult trapping on Kaua\u2018i indicates Culex quinquefasciatus populations peaked in October but provided no reliable evidence that larval control had any significant effect on adult populations. Overall, VectoMax\u00ae FG was very effective at larval control reducing larval abundance by 95% at 48 hours and out to 1-week post-treatment. Treatment was most effective (100% at 1-week post-treatment) in perched pools when early instar larvae were present and least effective in seeps when pupae and fourth instar larvae were most common. Although post-treatment counts fluctuated dramatically, we observed no evidence of population level impacts to the two most common non-target invertebrates: the water strider Microvelia vagans and endemic damselfly naiads (Megalagrion sp.). VectoMax\u00ae FG appears to be an effective and safe biopesticide for the local control of Culex quinquefasciatus larvae in forest bird habitat in the Alaka\u2018i Plateau. Further studies will be necessary to determine if local larval control significantly reduces adult mosquito abundance and, ultimately, avian malaria transmission, and if there are long term, non-target effects associated with repeated use of VectoMax\u00ae FG in natural Hawaiian waterways.",
"description": "iv, 34 p.",
"publisher": {
"@type": "Organization",
"name": "University of Hawaii"
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"author": [
{
"@type": "Person",
"name": "Lapointe, Dennis dlapointe@usgs.gov",
"givenName": "Dennis",
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"email": "dlapointe@usgs.gov",
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"@type": "Organization",
"name": "Pacific Island Ecosystems Research Center",
"url": "https://www.usgs.gov/pacific-island-ecosystems-research-center"
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]
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{
"@type": "Person",
"name": "Black, Theodore V.",
"givenName": "Theodore V.",
"familyName": "Black",
"affiliation": [
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"name": "USGS-PIERC (former)"
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"name": "Riney, Michael",
"givenName": "Michael",
"familyName": "Riney",
"affiliation": [
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"name": "USGS-PIERC (former)"
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"name": "Tredinnick, Grace",
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"affiliation": [
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"name": "Hawai\u2018i Cooperative Studies Unit, University of Hawai\u2018i at Hilo"
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"@type": "Person",
"name": "Crampton, Lisa H.",
"givenName": "Lisa H.",
"familyName": "Crampton"
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{
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"name": "Hite, Justin",
"givenName": "Justin",
"familyName": "Hite",
"affiliation": [
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"name": "Kaua\u2018i Forest Bird Recovery Project, Pacific Cooperative Studies Unit"
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"name": "Pacific Island Ecosystems Research Center",
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