Mosquito Growth in Catch Basins

Bunker, John W. M.

doi:10.2105/ajph.7.11.956

Cited by 7 publications

(4 citation statements)

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“…Mosquito control programs in urban settings have routinely applied larvicides to storm water catch basins for decades. 1,2 These efforts are made to reduce Culex spp. mosquitoes, particularly Culex pipiens (Lin.)…”

Section: Introductionmentioning

confidence: 99%

An Operational Evaluation of 3 Methoprene Larvicide Formulations for Use Against Mosquitoes in Catch Basins

Harbison

Runde

Henry

et al. 2018

Environ�Health�Insights

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Effectiveness in controlling mosquitoes in storm water catch basins in the North Shore Mosquito Abatement District (northeastern Cook County, Illinois) was determined for 3 formulations of methoprene-based larvicides (Altosid XR 150-day Briquets, Altosid 30-day Pellets, Altosid 30-day Granules) in 2017 using a pass/fail evaluation criterion, in which emergence of a single adult from pupae collected from the basin constituted a control failure. Over the course of the 16-week study, basins receiving the 150-day briquets were treated once and basins receiving the pellet and granular formulations were treated every 4 weeks, with the first treatment occurring during the last week of May. Untreated basins were also observed for comparison with the treated basins. Over the course of the study, adult mosquitoes emerged from pupae collected in 94.2% of the untreated basins that contained pupae. All of the formulations evaluated in the study demonstrated some degree of control compared with the untreated basins, with pupae successfully emerging as adults in 64.6%, 55.5%, and 21.8% of samples from 150-day briquet, 30-day tablet, and 30-day pellet–treated basins that contained pupae, respectively. Pellets reapplied every 28 days provided significantly more effective control than the other formulations. The simple pass/fail criterion for evaluating control effectiveness proved to be a useful procedure for comparing effectiveness to untreated basins and among treatments.

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Section: Introductionmentioning

confidence: 99%

An Operational Evaluation of 3 Methoprene Larvicide Formulations for Use Against Mosquitoes in Catch Basins

Harbison

Runde

Henry

et al. 2018

Environ�Health�Insights

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“…Their design includes a sump at their base below the outflow line meant to capture and prevent large debris from entering water treatment systems. Sumps can contain eutrophic water for extended periods of time making them ideal larval habitats for the primary urban mosquito vectors of WNV in the USA, Culex pipiens complex 10–12 . Other sources of C. pipiens complex larvae have been documented in urban environments, 13,14 but these habitats are more difficult to identify and treat than catch basins.…”

Section: Introductionmentioning

confidence: 99%

“…Sumps can contain eutrophic water for extended periods of time making them ideal larval habitats for the primary urban mosquito vectors of WNV in the USA, Culex pipiens complex. 10 , 11 , 12 Other sources of C. pipiens complex larvae have been documented in urban environments, 13 , 14 but these habitats are more difficult to identify and treat than catch basins. Thus, larval control in catch basins represents a common and widely replicated approach to WNV control in the US.…”

Section: Introductionmentioning

confidence: 99%

The community‐wide effectiveness of municipal larval control programs for West Nile virus risk reduction in Connecticut, USA

McMillan

Harden

Burtis

et al. 2021

Pest Management Science

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BACKGROUND Mosquito larval control through the use of insecticides is the most common strategy for suppressing West Nile virus (WNV) vector populations in Connecticut (CT), USA. To evaluate the ability of larval control to reduce entomological risk metrics associated with WNV, we performed WNV surveillance and assessments of municipal larvicide application programs in Milford and Stratford, CT in 2019 and 2020. Each town treated catch basins and nonbasin habitats (Milford only) with biopesticide products during both WNV transmission seasons. Adult mosquitoes were collected weekly with gravid and CO2‐baited light traps and tested for WNV; larvae and pupae were sampled weekly from basins within 500 m of trapping sites, and Culex pipiens larval mortality was determined with laboratory bioassays of catch basin water samples. RESULTS Declines in 4th instar larvae and pupae were observed in catch basins up to 2‐week post‐treatment, and we detected a positive relationship between adult female C. pipiens collections in gravid traps and pupal abundance in basins. We also detected a significant difference in total light trap collections between the two towns. Despite these findings, C. pipiens adult collections and WNV mosquito infection prevalence in gravid traps were similar between towns. CONCLUSION Larvicide applications reduced pupal abundance and the prevalence of host‐seeking adults with no detectable impact on entomological risk metrics for WNV. Further research is needed to better determine the level of mosquito larval control required to reduce WNV transmission risk.

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“…For example, larger rainfall events or catch basins prone to higher volumes and/or intensity of runoff may "flush" mosquitoes out of basins resulting in decreased larval abundance in the following days. [17][18][19] Jackson et al 4 found catch basins surrounded predominately by pavement were less likely to hold larvae than those with nearby trees or grassy areas. Indeed, Gardner et al 20 observed certain environmental features, including ammonia and nitrates in basin water, and the area of all shrubs of height ,1 m surrounding the catch basins were positively associated of high larval abundance, whereas pH and area of flowering shrub were negatively associated with larvae.…”

Section: Introductionmentioning

confidence: 99%

Identification of Larvicide-Resistant Catch Basins from Three Years of Larvicide Trials in a Suburb of Chicago, IL

Harbison

Sinacore

Henry

et al. 2014

Environ�Health�Insights

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The tens of thousands of catch basins found in many urban areas are a primary target of local vector control agencies for seasonal application of extended-release larvicides. A concern with using larvicides in these structures is that active ingredients can be hampered by high flows, debris, and sediment, all of which are common to these structures. As such a certain proportion of basins may be “resistant” to larvicide treatments due to site specific characteristics that may promote these and other factors that hinder larvicide action and/or promote mosquito infestation. Analyses from three years of larvicide efficacy trials suggest that over a quarter of basins in the study area may not be receiving adequate protection from a single dose of larvicide that is routinely applied. Implications of increasing the dose and/or toxicity of larvicide treatments are discussed further.

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Mosquito Growth in Catch Basins

Cited by 7 publications

References 0 publications

An Operational Evaluation of 3 Methoprene Larvicide Formulations for Use Against Mosquitoes in Catch Basins

An Operational Evaluation of 3 Methoprene Larvicide Formulations for Use Against Mosquitoes in Catch Basins

The community‐wide effectiveness of municipal larval control programs for West Nile virus risk reduction in Connecticut, USA

Identification of Larvicide-Resistant Catch Basins from Three Years of Larvicide Trials in a Suburb of Chicago, IL

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