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J Am Mosq Control Assoc

Title:		Characterization of truck-mounted atomization equipment typically used in vector control
Author(s):		Hoffmann WC; Walker TW; Martin DE; Barber JA; Gwinn T; Smith VL; Szumlas D; Lan Y; Fritz BK;
Address:		"USDA-Agricultural Research Service-Areawide Pest Management Research Unit, 2771 F&B Road, College Station, TX 77845, USA"
Journal Title:		J Am Mosq Control Assoc
Year:		2007
Volume:		23
Issue:		3
Page Number:		321 - 329
DOI:		10.2987/8756-971X(2007)23[321:COTAET]2.0.CO;2
ISSN/ISBN:		8756-971X (Print) 8756-971X (Linking)
Abstract:		"The control of medically important arthropod vectors of human and animal disease is a high priority for both public health and military officials. Because droplet size of pesticide spray material is a critical factor affecting vector control applications, the droplet-size spectra produced by 11 sprayers and 3 spray formulations were evaluated. Droplet-size spectra were measured by a laser diffraction instrument, a hot-wire system, and rotating slides. There were considerable differences in the droplet-size spectra produced by the different sprayers tested. The volume median diameter (Dv0.5) for the water-based sprays ranged from 4.7 to 211 microm, depending on the sprayer, and the percent of spray volume contained in droplets less than 20 microm (%vol <20 microm) ranged between 0.5% and 98.9%. The Dv0.5 measurements for the oil-based sprays ranged from 9.4 to 125.3 microm and the %vol <20 microm ranged between 2.4% and 97.9%. The correlations between the Dv0.5 measured by the laser system (Dv0.5-laser) and the mass median diameter, Sauter diameter, and Dv0.5 measured by the AIMS probe were all significant. Generally, the slide Dv0.5s were numerically similar to the Dv0.5 from the laser system and the Sauter diameter from the Army Insecticide Measuring System probe. There was less consistent agreement between the % <32 microm values obtained from the slides and those from the other 2 samplers. The information presented can be used by applicators to select the sprayer that produces the droplet-size spectra needed for their particular application situation"
Keywords:		Insecticides/chemistry Lasers Mosquito Control/*instrumentation Motor Vehicles *Nebulizers and Vaporizers Polytetrafluoroethylene;
Notes:		"MedlineHoffmann, W C Walker, T W Martin, D E Barber, J A B Gwinn, T Smith, V L Szumlas, D Lan, Y Fritz, B K eng Comparative Study Research Support, U.S. Gov't, Non-P.H.S. 2007/10/18 J Am Mosq Control Assoc. 2007 Sep; 23(3):321-9. doi: 10.2987/8756-971X(2007)23[321:COTAET]2.0.CO; 2"