PMID: 2485171Oct 1, 1988Paper

Effects of screen materials on droplet size frequency distribution of aerosols entering sentinel mosquito exposure tubes

Medical and Veterinary Entomology
L R BoobarJ H Nelson

Abstract

Aerosol filtration effects of three types of mesh screen used for mosquito cages were evaluated with aerosolized water, mineral oil and chlorpyrifos. The screen materials were two nylon tulles (3 x 4 and 8 x 11 repeats per cm2) and corrosion-resistant steel (7 x 7 repeats per cm2). Open areas of these three mesh materials were, respectively, 94%, 79% and 88%. Aerosol droplet size frequency distributions were altered when passed through test screens of these materials fitted to standard tubes from World Health Organization test-kits for exposure of adult mosquitoes. The alterations included reductions in total droplets and volume median diameter (VmD). Nylon screen with fewer repeats of the mesh altered droplet VmD and frequency distribution the least, allowing the greatest number of droplets to enter sentinel mosquito cages for bioassays of mortality-rates. The greater filtration effect of screens with less open area, giving rise to selective deposition of particular droplet sizes on the screen material, could result in anomalous exposures of test mosquitoes to contact with insecticide filtrate on the screen substrate. This might help to explain the poor correlation often observed between insecticide aerosol impact on wild targ...Continue Reading

Citations

Jan 27, 2010·Journal of the American Mosquito Control Association·Mark S BreidenbaughFerenc A De Szalay
Apr 21, 2010·Journal of the American Mosquito Control Association·Jane A S BondsVenit Patel
Feb 5, 2011·Journal of the American Mosquito Control Association·Bradley K FritzJane Bonds
Feb 12, 2013·Journal of the American Mosquito Control Association·Bradley K FritzJane Bonds
Oct 23, 2008·Journal of the American Mosquito Control Association·W Clint HoffmannMiriam F Cooperband
Apr 30, 2014·Journal of the American Mosquito Control Association·Mikel BengoaJavier Lucientes

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