| Canopy Penetration and Deposition of Barrier Sprays from Electrostatic and Conventional Sprayers |
Jan-2009 |
10 pages |
| Authors:
W C Hoffmann; J Hogsette; U Bernier; B Fritz; M Farooq; Y Huang; Y Lan; B Quinn; D Szumlas; V L Smith; T W Walker; C A Robinson; AGRICULTURAL RESEARCH SERVICE COLLEGE STATION TX
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 | An experimental study was conducted to investigate the usefulness of electrostatic and conventional sprayers for barrier applications. Two conventional and three electrostatic sprayers were used in the study. Usefulness of the sprayers was rated based on penetration of spray into and deposition onto 2 sides of leaves on natural vegetation. Bifenthrin (TalstarTM adulticide) was applied at labeled rate, fluorescent dye was added to the tank mix as tracer, and all ... |
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| Samplers for Evaluation and Quantification of Ultra-Low Volume Space Sprays |
Jan 2009 |
5 pages |
| Authors:
M Farooq; W C Hoffmann; T W Walker; V L Smith; C A Robinson; J C Dunford; I W Sutherland; NAVY ENTOMOLOGY CENTER OF EXCELLENCE JACKSONVILLE FL
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| A field study was conducted to explore the suitability of 5 pesticide deposition samplers for airborne spray and ground deposits from ultra-low-volume (ULV) space sprays. Samplers included horizontally stretched stationary cotton ribbons at 2 heights, rotating ribbon, rotating Teflon slides, and filter paper. Slides were also used for droplet-size analysis. A set of 7 samplers of each type was placed at 1, 7, 15, 25, 40, 65, and 90 m ... |
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| Spray Characterization of Thermal Fogging Equipment Typically Used in Vector Control |
Dec-2008 |
11 pages |
| Authors:
W C Hoffmann; Y Huang; Y Lan; B Quinn; D Szumlas; V L Smith; T Gwinn; B K Fritz; T W Walker; D Sykes; SOUTHERN PLAINS AGRICULTURAL RESEARCH CENTER COLLEGE STATION TX AREAWIDE PEST MANAGEMENT RESEARCH UNIT
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| Droplet size spectra from different sprayers used to generate insecticide-laden fogs for controlling flying insects were measured by a laser diffraction instrument and Teflon-coated slides. The objectives of this work were to present not only information on spray-system droplet size generated by different sprayers, but to compare methodologies by which other similar systems can be evaluated and give applicators sprayer-system performance data. Data from 45 replicated spray tests, comprising 11 ... |
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| Characterization of Truck-Mounted Atomization Equipment Typically Used in Vector Control |
Jan-2007 |
10 pages |
| Authors:
W C Hoffmann; T W Walker; D E Martin; J A Barber; T Gwinn; V L Smith; D Szumlas; Y Lan; B K Fritz; TEXAS A AND M UNIV COLLEGE STATION COLL OF AGRICULTURE
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| 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 ... |
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