Identification of larvicide-resistant catch basins from three years of larvicide trials in a suburb of chicago, IL.
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.
Division of Epidemiology, Department of Public Health Sciences, Loyola University Medical Center, Maywood, IL, USA. ; North Shore Mosquito Abatement District, Northfield, IL, USA.
Justin E
JE
Harbison
Division of Biostatistics, Department of Public Health Sciences, Loyola University Medical Center, Maywood, IL, USA.
James M
JM
Sinacore
North Shore Mosquito Abatement District, Northfield, IL, USA.
Marlon
M
Henry
North Shore Mosquito Abatement District, Northfield, IL, USA.
Christopher
C
Xamplas
Division of Epidemiology, Department of Public Health Sciences, Loyola University Medical Center, Maywood, IL, USA.
Lara R
LR
Dugas
Department of Pathobiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
Marilyn O'Hara
MO
Ruiz
West Nile virus; catch basin; larvicide; mosquitoes