Environmental fate model for ultra-low-volume insecticide applications used for adult mosquito management

Schleier, Jerome J.; Peterson, Robert K. D.; Irvine, Kathryn M.; Marshall, Lucy; Weaver, David K.; Preftakes, Collin J.

doi:10.1016/j.scitotenv.2012.07.059

Cited by 23 publications

(32 citation statements)

References 41 publications

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“…We performed a probabilistic acute ecological risk assessment using actual environmental deposition of permethrin on surfaces after ground-based ULV applications [27]. We chose an acute risk assessment because the presence of suspended sediment substantially reduces the freely dissolved concentration of pyrethroids, thereby greatly reducing the bioavailability [13][14][15][16][17][18][19][20][21].…”

Section: Problem Formulationmentioning

confidence: 99%

“…We used the actual measured permethrin deposition (mg/ cm 2 ) from the data on ground deposition from Schleier et al [27] permethrin; Bayer Environmental Science), and Aqua-Kontrol (20% permethrin; Univar) between the distances of 5 and 180 m was used to model the environmental concentrations. Schleier et al [27] showed that the densities of the formulations had the largest effect on the predicted deposition of insecticide depositing on surfaces; therefore, we modeled all deposition values for permethrin using the different formulations to reflect the variability in the densities of different formulations.…”

Section: Exposure Assessmentmentioning

confidence: 99%

“…To address the lack of a model specific to ULV applications for adult mosquito management, Schleier et al [27] developed a validated statistical model for predicting deposition of insecticides applied with ground-based ULV technology for adult mosquito management. The data set that Schleier et al [27] generated of actual deposition in the environment is one of the largest systematic studies on pesticide drift to date. The data set and model are robust with respect to environmental and application scenarios that are typically used for adult mosquito management [27].…”

Section: Introductionmentioning

confidence: 99%

“…The data set that Schleier et al [27] generated of actual deposition in the environment is one of the largest systematic studies on pesticide drift to date. The data set and model are robust with respect to environmental and application scenarios that are typically used for adult mosquito management [27].…”

Section: Introductionmentioning

confidence: 99%

“…To address the uncertainties associated with the risks of ULV applications and the contradictory findings of other ecological risk assessments, we performed a probabilistic aquatic ecological risk assessment for permethrin using the measured actual environmental deposition from Schleier et al [27]. The present study is the first ecological risk assessment for pyrethroids to integrate quantitatively the reduction in bioavailability resulting from the presence of Environmental Toxicology and Chemistry, Vol.…”

Section: Introductionmentioning

confidence: 99%

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A refined aquatic ecological risk assessment for a pyrethroid insecticide used for adult mosquito management

Schleier

Peterson

2013

Enviro Toxic and Chemistry

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Abstract-The use of pyrethroid insecticides has increased substantially throughout the world over the past few decades as the use of organophorous, carbamate, and organochlorine insecticides is being phased out. Pyrethroids are the most common class of insecticides for ultralow-volume (ULV) aerosol applications used to manage high densities of adult mosquitoes. Pyrethroids are highly toxic to nontarget organisms such as certain aquatic organisms, and there have been concerns about the effect of applications of ULV insecticides on these organisms. To address the uncertainties associated with the risks of ULV applications and the contradictory findings of other ecological risk assessments, the authors performed a probabilistic aquatic ecological risk assessment for permethrin using actual environmental deposition on surfaces to estimate permethrin concentrations in water. The present study is the first ecological risk assessment for pyrethroids to quantitatively integrate the reduction in bioavailability resulting from the presence of dissolved organic matter. As part of the risk assessment, the authors incorporated a species sensitivity distribution to take into account the differences in toxicity for different species. The 95th percentile estimated concentration would result in less than 0.0001% of the potentially affected fraction of species reaching the lethal concentration that kills 50% of a population. The results of the present study are supported by the weight of evidence that pyrethroids applied by ground-based ULV equipment will not result in deleterious effects on aquatic organisms. Environ. Toxicol. Chem. 2013;32:948-953. # 2013 SETAC

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Section: Problem Formulationmentioning

confidence: 99%

Section: Exposure Assessmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A refined aquatic ecological risk assessment for a pyrethroid insecticide used for adult mosquito management

Schleier

Peterson

2013

Enviro Toxic and Chemistry

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Space treatment by fogging

2014

Pesticide Application Methods

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Monitoring the aquatic toxicity of mosquito vector control spray pesticides to freshwater receiving waters

Phillips

Anderson

Voorhees

et al. 2014

Integr Envir Assess & Manag

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Pesticides are applied to state and local waterways in California to control insects such as mosquitoes, which are known to serve as a vector for West Nile Virus infection of humans. The California State Water Resources Control Board adopted a National Pollutant Discharge Elimination System General Permit to address the discharge to waters of the United States of pesticides resulting from adult and larval mosquito control. Because pesticides used in spray activities have the potential to cause toxicity to nontarget organisms in receiving waters, the current study was designed to determine whether toxicity testing provides additional, useful environmental risk information beyond chemical analysis in monitoring spray pesticide applications. Monitoring included a combination of aquatic toxicity tests and chemical analyses of receiving waters from agricultural, urban, and wetland habitats. The active ingredients monitored included the organophosphate pesticides malathion and naled, the pyrethroid pesticides etofenprox, permethrin, and sumithrin, pyrethrins, and piperonyl butoxide (PBO). Approximately 15% of the postapplication water samples were significantly toxic. Toxicity of half of these samples was attributed to the naled breakdown product dichlorvos. Toxicity of 2 other water samples likely occurred when PBO synergized the effects of pyrethroid pesticides that were likely present in the receiving system. Four of 43 postapplication sediment samples were significantly more toxic than their corresponding pre-application samples, but none of the observed toxicity was attributed to the application events. These results indicate that many of the spray pesticides used for adult mosquito control do not pose significant acute toxicity risk to invertebrates in receiving systems. In the case of naled in water, analysis of only the active ingredient underestimated potential impacts to the receiving system, because toxicity was attributed to the breakdown product, dichlorvos. Toxicity testing can provide useful risk information about unidentified, unmeasured toxicants or mixtures of toxicants. In this case, toxicity testing provided information that could lead to the inclusion of dichlorvos monitoring as a permit requirement.

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Environmental fate model for ultra-low-volume insecticide applications used for adult mosquito management

Cited by 23 publications

References 41 publications

A refined aquatic ecological risk assessment for a pyrethroid insecticide used for adult mosquito management

A refined aquatic ecological risk assessment for a pyrethroid insecticide used for adult mosquito management

Space treatment by fogging

Monitoring the aquatic toxicity of mosquito vector control spray pesticides to freshwater receiving waters

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