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United States Department of Agriculture

Agricultural Research Service

Related Topics

Wesley C Hoffmann (Clint)
Aerial Application Technology Research Unit
Agricultural Engineer

Phone: (979) 260-9521
Fax: (979) 260-9386
2771 F&B ROAD
COLLEGE STATION, TX, 77845

Projects
Aerial Application Technology for Sustainable Crop Production
Appropriated (D)
  Accession Number: 425641
Deployed Warfighter Protection Research Program (FY2013)
Interagency Reimbursable Agreement (I)
  Accession Number: 424791
Develop Improved Timing of Application Technology to Reduce Exposure of Pesticides to Honeybees
Specific Cooperative Agreement (S)
  Accession Number: 424621

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Measuring droplet size data with laser diffraction - Measurement distance and airspeed influence - (Peer Reviewed Journal) - (15-Dec-13)
Toxicity and feeding response of adult corn earworm (Lepidoptera: Noctuidae) to an organic spinosad formulation in sucrose solution - (Peer Reviewed Journal)
Lopez, J., Latheef, M.A., Hoffmann, W.C. 2014. Toxicity and feeding response of adult corn earworm (Lepidoptera: Noctuidae) to an organic spinosad formulation in sucrose solution. Pest Management Science. 2(1):33-41.
Evaluation of 1, 3, 6, 8-Pyrene Tetra Sulfonic Acid tetra sodium salt (PTSA) as an agricultural spray tracer dye - (Peer Reviewed Journal)
Hoffmann, W.C., Fritz, B.K., Ledebuhr, M. 2014. Evaluation of 1, 3, 6, 8-pyrene tetra sulfonic acid tetra sodium salt (PTSA) as an agricultural spray tracer dye. Applied Engineering in Agriculture. 30(1):25-28.
Inflence of air shear and adjuvants on spray atomization - (Peer Reviewed Journal) - (01-Nov-13)
Comparison of drop size data from ground and aerial application nozzles at three testing laboratories - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Kruger, G., Henry, R., Hewitt, A., Czaczyk, Z. 2014. Comparison of drop size data from ground and aerial application nozzles at three testing laboratories. Atomization and Sprays. 24(2): 181-192.
Development and prospect of unmanned aerial vehicles for agricultural production management - (Peer Reviewed Journal)
Huang, Y., Thomson, S.J., Hoffman, W.C., Lan, Y., Fritz, B.K. 2013. Development and prospect of unmanned aerial vehicles for agricultural production management. International Journal of Agricultural and Biological Engineering. 6(3):1-10.
Remote sensing and aerial application - (Popular Publication)
Yang, C., Hoffmann, W.C., Fritz, B.K. 2013. Remote sensing and aerial application. Agricultural Aviation. 40(5):23-25.
A two-camera imaging system for pest detection and aerial application - (Abstract Only)
Yang, C., Hoffmann, W.C., Martin, D.E., Lan, Y., Fritz, B.K., Westbrook, J.K., Suh, C.P. 2013. A two-camera imaging system for pest detection and aerial application. ASABE Annual International Meeting. Paper No. 131598742.
Evaluation of aerial spray technologies for adult mosquito control applications - (Peer Reviewed Journal)
Hoffmann, W.C., Fritz, B.K., Farooq, M., Walker, T., Hornsby, J., Bond, J. 2013. Evaluation of aerial spray technologies for adult mosquito control applications. Journal of Plant Protection Research. 53:222-29.
Spectral response of spider mite infested cotton: Mite density and miticide rate study - (Peer Reviewed Journal)
Lan, Y., Zhang, H., Hoffmann, W.C., Lopez, J. 2013. Spectral response of spider mite infested cotton: Mite density and miticide rate study. International Journal of Agricultural and Biological Engineering. 6:48-52.
Atomization from agricultural spray nozzles: Effects of air shear and tank mix adjuvants - (Proceedings)
Fritz, B.K., Hoffmann, W.C., Bagley, W.E., Kruger, G. 2013. Atomization from agricultural spray nozzles: Effects of air shear and tank mix adjuvants. Proceedings of the 10th Annual International Symposium on Adjuvants for Agrochemicals. April 22-26, 2013. Foz de Iguacu, Brazil.
Fusion of remotely sensed data from airborne and ground-based sensors to enhance detection of cotton plants - (Peer Reviewed Journal)
Zhang, H., Lan, Y., Suh, C.P., Westbrook, J.K., Hoffmann, W.C., Yang, C., Huang, Y. 2013. Fusion of remotely sensed data from airborne and ground-based sensors to enhance detection of cotton plants. Computers and Electronics in Agriculture. 93:55-59.
Contact toxicities of Anuran Skin Alkaloids against the Red Imported Fire Ant (Solenopsis invicta) - (Peer Reviewed Journal)
Weldon, P., Cardoza, Y.J., Vander Meer, R.K., Hoffmann, W.C., Daly, J.W., Spande, T.F. 2013. Contact toxicities of Anuran Skin Alkaloids against the Red Imported Fire Ant (Solenopsis invicta). Naturwissenschaften . 100:185-192.
Measurement and classification methods using the ASAE S572-1 reference nozzles - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Czaczyk, Z., Bagley, W., Kruger, G., Henry, R. 2012. Measurement and classification methods using the ASAE S572-1 reference nozzles. Journal of Plant Protection Research. 52:447-457.
Correction of spray concentration and bioassay cage penetration data - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Bonds, J., Haas, K. 2012. Correction of spray concentration and bioassay cage penetration data. American Mosquito Control Association. 28(40):320-322.
Development of an unmanned agricultural robotics system for measuring crop conditions for precision aerial application - (Abstract Only)
Lan, Y., Zheng, Y., Wang, Y., Hoffmann, W.C. 2012. Development of an unmanned agricultural robotics system for measuring crop conditions for precision aerial application. ASABE Annual International Meeting. Paper No. 121338444.
Determination of selection criteria for spray drift reduction from atomization data - (Peer Reviewed Journal)
Hoffmann, W.C., Fritz, B.K., Bagley, W., Gednalske, J., Elsik, C., Kruger, G. 2012. Determination of selection criteria for spray drift reduction from atomization data. ASTM Special Technical Publication 1558 STP. p. 65-79.
Effect of formulated glyphosate and adjuvant tank mixes on atomization from aerial application flat fan nozzles - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Bagley, W.E. 2012. Effect of formulated glyphosate and adjuvant tank mixes on atomization from aerial application flat fan nozzles. Journal of ASTM International. doi 10.1520/STP104451.
Differentiation of cotton from other crops at different growth stages using spectral properties and discriminant analysis - (Peer Reviewed Journal)
Zhang, H., Lan, Y., Suh, C.P., Westbrook, J.K., Lacey, R., Hoffmann, W.C. 2012. Spectral properties of crops at different growth stages. Transactions of the ASABE. 55:1-8.
Wind tunnel and field evaluation of drift from aerial spray applications with multiple spray formulations - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Bretthauer, S., Wolf, R.E., Bagley, W.E. 2012. Wind tunnel and field evaluation of drift from aerial spray applications with multiple spray formulations. Journal of ASTM International. doi 10-1520/STP104403.
Further evaluation of spray characterization of sprayers typically used in vector control - (Peer Reviewed Journal)
Hoffmann, W.C., Walker, T.W., Fritz, B.K., Farooq, M., Smith, V.L., Robinson, C.A., Lan, Y. 2012. Further evaluation of spray characterization of sprayers typically used in vector control. Journal of the American Mosquito Control Association. 28(2):93-101.
Precision aerial application for site-specific rice crop management - (Abstract Only)
Lan, Y., Hoffmann, W.C. 2012. Precision aerial application for site-specific rice crop management. Rice Technical Working Group Meeting Proceedings. CD-ROM.
Aerial ULV application of permethrin against adult mosquitoes over open field and medium density canopy habitat in a hot-temperate zone - (Abstract Only)
Britch, S.C., Linthicum, K., Aldridge, R.L., Walker, T.W., Farooq, M., Fritz, B.K., Hoffmann, W.C., Parker, C.T., Breidenbaugh, M.S., Kerce, J. 2012. Aerial ULV application of permethrin against adult mosquitoes over open field and medium density canopy habitat in a hot-temperate zone. Meeting Abstract. p.39.
Discriminating among cotton cultivars with varying leaf characteristics using hyperspectral radiometry - (Peer Reviewed Journal)
Zhang, H., Hinze, L.L., Lan, Y., Westbrook, J.K., Hoffmann, W.C. 2012. Discriminating among cotton cultivars with varying leaf characteristics using hyperspectral radiometry. Transactions of the ASABE. 55(1):275-280.
Fusion of remotely sensed data from airborne and ground-based sensors for cotton regrowth study - (Proceedings)
Lan, Y., Zhang, H., Suh, C.P., Westbrook, J.K., Hoffmann, W.C., Yang, C., Huang, Y. 2011. Fusion of remotely sensed data from airborne and ground-based sensors for cotton regrowth study. ASA-CSSA-SSSA Proceedings. CD-ROM.
Effect of Hexaflumuron on feeding response and reproduction of bollworm, Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) - (Peer Reviewed Journal)
Lopez, J., Latheef, M.A., Hoffmann, W.C. 2011. Effect of Hexaflumuron on feeding response and reproduction of bollworm, Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae). Southwestern Entomologist. 36(3):247-259.
Expansion of the USDA ARS Aerial Application spray atomization models - (Proceedings)
Fritz, B.K., Hoffmann, W.C., Martin, D.E., Lan, Y. 2011. Expansion of the USDA ARS Aerial Application spray atomization models. Proceedings Annual Conference on Liquid Atomization and Spray Systems. Estoril, Portugal, September 5-7, 2011. p. 1-7.
Effect of abamectin on feeding response, mortality, and reproduction of adult bollworm (Lepidoptera: Noctuidae) - (Peer Reviewed Journal)
Lopez, J., Latheef, M.A., Hoffmann, W.C. 2011. Effect of abamectin on feeding response, mortality, and reproduction of adult bollworm (Lepidoptera: Noctuidae). Southwestern Entomologist. 36:155-166.
Field scale evaluation of spray drift reduction technologies from ground and aerial application systems - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Bagley, W.E., Hewitt, A. 2011. Field scale evaluation of spray drift reduction technologies from ground and aerial application systems. Journal of ASTM International. 8(5):JAI103457.
Multiple image sensor data fusion through artificial neural networks - (Peer Reviewed Journal)
Huang, Y., Lan, Y., Hoffmann, W.C., Lacey, R. 2011. Multiple image sensor data fusion through artificial neural networks. Advances in Natural Science. 4:1-13.
Air and spray mixture temperature effects on atomization of agricultural sprays - (Peer Reviewed Journal)
Hoffmann, W.C., Fritz, B.K., Martin, D.E. 2011. Air and spray mixture temperature effects on atomization of agricultural sprays. Agricultural Engineering International: CIGR Journal. 13(1):Manuscript 1730.
Effects of air speed and liquid temperature on droplet size - (Peer Reviewed Journal)
Hoffmann, W.C., Fritz, B.K., Bagley, W.E., Lan, Y. 2011. Effects of air speed and liquid temperature on droplet size. Journal of ASTM International. 8(4):JAI103461.
A fluorescent tracer method for evaluating spray transport and fate of field and laboratory spray applications - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Jank, P.C. 2011. A fluorescent tracer method for evaluating spray transport and fate of field and laboratory spray applications. Journal of ASTM International. 8(3):JAI103619.
Spatial analysis of NDVI readings with difference sampling density - (Peer Reviewed Journal)
Zhang, H., Lan, Y., Lacey, R., Hoffmann, W.C., Westbrook, J.K. 2011. Spatial analysis of NDVI readings with difference sampling density. Transactions of the ASABE. 54:349-354.
Volumetric Collection Efficiency and Droplet Sizing Accuracy of Rotary Impactors - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Bonds, J.A., Farooq, M. 2011. Volumetric collection efficiency and droplet sizing accuracy of rotary impactors. Transactions of the ASABE. 54:57-63.
Impact of electrostatic and conventional sprayers characteristics on dispersion of barrier spray - (Peer Reviewed Journal)
Farooq, M., Walker, T.W., Heintschel, B.P., Hoffmann, W.C., Fritz, B.K., Smith, V.L., Robinson, C.A., English, T. 2010. Impact of electrostatic and conventional sprayers characteristics on dispersion of barrier spray. Journal of the American Mosquito Control Association. 26:422-429.
Mortality and reproductive effects of ingested spinosad on adult bollworm - (Peer Reviewed Journal)
Lopez, J., Latheef, M.A., Hoffmann, W.C. 2011. Mortality and reproductive effects of ingested spinosad on adult bollworm. Pest Management Science. 67:220-225.
Filtration effects due to bioassay cage design and screen type - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Farooq, M., Walker, T., Bonds, J. 2010. Filtration effects due to bioassay cage design and screen type. Journal of the American Mosquito Control Association. 26:411-421.
Spatial Modeling and Variability Analysis for Modeling and Prediction of Soil and Crop Canopy Coverage Using Multispectral Imagery from an Airborne Remote Sensing System - (Peer Reviewed Journal)
Huang, Y., Lan, Y., Ge, Y., Hoffmann, W.C., Thomson, S.J. 2010. Spatial Modeling and Variability Analysis for Modeling and Prediction of Soil and Crop Canopy Coverage Using Multispectral Imagery from an Airborne Remote Sensing System. Transactions of the ASABE. 53(4):1321-1329.
Development of a PWM precision spraying controller for unmanned aerial vehicles - (Peer Reviewed Journal)
Zhu, H., Lan, Y., Wu, W., Hoffmann, W.C., Huang, Y., Xue, X., Liang, J., Fritz, B.K. 2010. Development of a PWM precision spraying controller for unmanned aerial vehicles. Journal of Bionics. 7:276-283.
Spray drift reduction evaluations of spray nozzles using a standardized testing protocol - (Peer Reviewed Journal)
Hoffmann, W.C., Fritz, B.K., Thornburg, J.W., Bagley, W.E., Birchfield, N.B., Ellenberger, J. 2010. Spray drift reduction evaluations of spray nozzles using a standardized testing protocol. Journal of ASTM International. 7(6):JAI102820.
Current status and future directions of precision aerial application for site-specific crop management in the USA - (Peer Reviewed Journal)
Lan, Y., Thomson, S.J., Huang, Y., Hoffmann, W.C., Zhang, H. 2010. Current status and future directions of precision aerial application for site-specific crop management in the USA. Computers and Electronics in Agriculture. 74:34-38.
Multisensor data fusion of remotely sensed imagery for crop field mapping - (Proceedings)
Lan, Y., Zhang, H., Yang, C., Zhao, K., Huang, Y., Hoffmann, W.C., Lacey, R. 2010. Multisensor data fusion of remotely sensed imagery for crop field mapping. International Conference on Precision Agriculture Abstracts & Proceedings. CDROM.
Novaluron as an ovicide for bollworm on cotton: Deposition and efficacy of field-scale aerial applications - (Peer Reviewed Journal)
Martin, D.E., Lopez, J., Lan, Y., Fritz, B.K., Hoffmann, W.C., Duke, S.E. 2010. Novaluron as an ovicide for bollworm on cotton: Deposition and efficacy of field-scale aerial applications. Journal of Cotton Science. 14:99-106.
Spectral properties of crops at different growth stages - (Proceedings)
Zhang, H., Lan, Y., Suh, C.P., Westbrook, J.K., Lacey, R., Hoffmann, W.C. 2010. Spectral properties of crops at different growth stages. ASABE Annual International Meeting. Paper No. 10-9038.
Simulating and characterizing agricultural ground applications for soil VOC deposition studies - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Rohde, A., Warren, C., Faulkner, W. 2010. Simulating and characterizing agricultural ground applications for soil VOC deposition studies. Journal of ASTM International. 7(7):Paper ID JAI102776.
Ground-based spectral reflectance measurements for evaluating the efficacy of aerially-applied glyphosate treatments - (Peer Reviewed Journal)
Zhang, H., Lan, Y., Lacey, R., Hoffmann, W.C., Martin, D.E., Fritz, B.K., Lopez, J. 2010. Ground-based spectral reflectance measurements for evaluating the efficacy of aerially-applied glyphosate treatments. Biosystems Engineering. 107:10-15.
Effect of emamectin benzoate on mortality, proboscis extension, gustation and reproduction of the corn earworm, Helicoverpa zea - (Peer Reviewed Journal)
Lopez, J., Latheef, M.A., Hoffmann, W.C. 2010. Effect of emamectin benzoate on mortality, proboscis extension, gustation and reproduction of the corn earworm, Helicoverpa zea. Journal of Insect Science. 10:Article 89.
Evaluation of spray drift using low speed wind tunnel measurements and dispersion modeling - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Birchfield, N., Ellenberger, J., Kahn, F., Bagley, W.E., Thornburg, J.W., Hewitt, A. 2010. Evaluation of spray drift using low speed wind tunnel measurements and dispersion modeling. Journal of ASTM International. 7(6):JAI102775.
Development of Unmanned Aerial Vehicles for Site-Specific Crop Production Management - (Proceedings)
Huang, Y., Hoffmann, W.C., Lan, Y., Thomson, S.J., Fritz, B.K. 2010. Development of Unmanned Aerial Vehicles for Site-Specific Crop Production Management. Proceedings of 10th International Conference on Precision Agriculture, July 18-21, 2010, Denver, CO. CDROM.
Evaluation of low-volume sprayers used in asian citrus Psyllid control applications - (Peer Reviewed Journal)
Hoffmann, W.C., Fritz, B.K., Martin, D.E., Atwood, R., Hurner, T., Ledebuhr, M., Tandy, M., Jackson, J., Wisler, G.C. 2010. Evaluation of low-volume sprayers used in asian citrus Psyllid control applications. HortTechnology. 20:632-639.
Quantifying the movement of multiple insects using an optical insect counter - (Peer Reviewed Journal)
Hoffmann, W.C., Jank, P.C., Klun, J.A., Fritz, B.K. 2010. Quantifying the movement of multiple insects using an optical insect counter. Journal of the American Mosquito Control Association. 26:167-171.
Development of Soft Computing and Applications in Agricultural and Biological Engineering Reprint Icon - (Peer Reviewed Journal)
Huang, Y., Lan, Y., Thomson, S.J., Fang, A., Hoffmann, W.C., Lacey, R. 2010. Development of Soft Computing and Applications in Agricultural and Biological Engineering. Computers and Electronics in Agriculture. 71:107-127.
Low-volume sprayer rodeos - (Popular Publication)
Hoffmann, W.C., Fritz, B.K., Martin, D.E. 2009. Low-volume sprayer rodeos. Florida Grower. p. 12-13.
Ground-based spectral reflectance measurements for efficacy evaluation of aerially applied glyphosate treatments - (Proceedings)
Zhang, H., Lan, Y., Lacey, R., Hoffmann, W.C., Martin, D.E., Fritz, B.K., Lopez, J. 2009. Ground-based spectral reflectance measurements for efficacy evaluation of aerially applied glyphosate treatments. National Agricultural Aviation Association Meeting. Paper No. AA09-004.
An overview of spray drift reduction testing of spray nozzles - (Proceedings)
Fritz, B.K., Hoffmann, W.C., Thornburg, J.W., Bagley, W.E., Birchfield, N., Ellenberger, J. 2009. An overview of spray drift reduction testing of spray nozzles. National Agricultural Aviation Association Meeting. Paper No. AA09-002.
Analysis of variograms with various sample sizes from a multispectral image - (Peer Reviewed Journal)
Zhang, H., Lan, Y., Lacey, R., Huang, Y., Hoffmann, W.C., Martin, D.E., Bora, G. 2009. Analysis of variograms with various sample sizes from a multispectral image. International Journal of Agricultural and Biological Engineering. 2:62-69.
Samplers for evaluation and quantification of ultra-low volume space sprays - (Peer Reviewed Journal)
Farooq, M., Hoffmann, W.C., Walker, T., Smith, V., Robinson, C., Dunford, J., Sutherland, I.W. 2009. Samplers for evaluation and quantification of ultra-low volume space sprays. Journal of the American Mosquito Control Association. 25:521-524.
Current status and future directions of precision agriculture for aerial application in the USA - (Proceedings)
Lan, Y., Thomson, S.J., Huang, Y., Hoffmann, W.C., Zhang, H. 2009. Current status and future directions of precision agriculture for aerial application in the USA. Asian Conference on Precision Agriculture. CDROM.
Aerosol sampling: Comparison of two rotating impactors for field droplet sizing and volumetric measurements - (Peer Reviewed Journal)
Barber, J., Greer, M., Fritz, B.K., Hoffmann, W.C. 2009. Aerosol sampling: Comparison of two rotating impactors for field droplet sizing and volumetric measurements. Journal of the American Mosquito Control Association. 25:474-479.
Analysis of variograms with various sample sizes from a multispectral image - (Proceedings)
Zhang, H., Lan, Y., Lacey, R., Huang, Y., Hoffmann, W.C., Martin, D.E., Bora, G. 2009. Analysis of variograms with various sample sizes from a multispectral image. Asian Conference on Precision Agriculture. CDROM.
Effects of spray mixtures on droplet size under aerial application conditions and implications on drift - (Peer Reviewed Journal)
Fritz, B.K., Bagley, B., Hoffmann, W.C. 2010. Effects of spray mixtures on droplet size under aerial application conditions and implications on drift. Applied Engineering in Agriculture. 26:21-29.
Analysis of vegetation indices derived from aerial multispectral and ground hyperspectral data - (Peer Reviewed Journal)
Zhang, H., Lan, Y., Lacey, R., Hoffmann, W.C., Huang, Y. 2009. Analysis of vegetation indices derived from aerial multispectral and ground hyperspectral data. International Journal of Agricultural and Biological Engineering. 2:1-8.
Development of a Spray System for An Unmanned Aerial Vehicle Platform - (Peer Reviewed Journal)
Huang, Y., Hoffmann, W.C., Lan, Y., Wu, W., Fritz, B.K. 2009. Development of a Spray System for An Unmanned Aerial Vehicle Platform. Applied Engineering in Agriculture. 25(6):803-809.
Aerial spray deposition on corn silks applied at high and low spray rates - (Peer Reviewed Journal)
Fritz, B.K., Lopez, J., Latheef, M.A., Martin, D.E., Hoffmann, W.C., Lan, Y. 2009. Aerial spray deposition on corn silks applied at high and low spray rates. International Agricultural Engineering Journal. 11:Manuscript 1360.
Spray characterization of ULV sprayers typically used in vector control - (Peer Reviewed Journal)
Hoffmann, W.C., Walker, T., Fritz, B.K., Farooq, M., Smith, V., Robinson, C., Szumlas, D., Lan, Y. 2009. Spray characterization of ULV sprayers typically used in vector control. Journal of the American Mosquito Control Association. 25:332-337.
Spatial analysis of hyperspectral vegetation index - (Proceedings)
Zhang, H., Lan, Y., Lacey, R., Hoffmann, W.C., Westbrook, J.K. 2009. Spatial analysis of hyperspectral vegetation index. ASABE Annual International Meeting. Paper No. 09-5982.
Canopy penetration and deposition of barrier sprays from electrostatic and conventional sprayers - (Peer Reviewed Journal)
Hoffmann, W.C., Farooq, M., Walker, T.W., Fritz, B.K., Szumlas, D., Bernier, U.R., Hogsette Jr., J.A., Lan, Y., Huang, Y., Quinn, B.P., Smith, V.L., Robinson, C.A. 2009. Canopy penetration and deposition of barrier sprays from electrostatic and conventional sprayers. Journal of the American Mosquito Control Association. 25:323-331.
Rapid identification of rice samples using an electronic nose - (Peer Reviewed Journal)
Zheng, X., Lan, Y., Zhu, J., Westbrook, J.K., Hoffmann, W.C., Lacey, R. 2009. Rapid identification of rice samples using an electronic nose. Journal of Bionics. 6:290-497.
Wind-tunnel tests and modeling indicate that aerial dispersant delivery operations are highly accurate - (Book / Chapter)
Hoffmann, W.C., Nedwed, T., Coolbaugh, T., Huber, C.A., Fritz, B.K. 2009. Wind-tunnel tests and modeling indicate that aerial dispersant delivery operations are highly accurate. In: Jones, N., editor. Proceedings of the Thirty-second AMOP Technical Seminar on Environmental Contamination and Response. Ottawa, Ontario, Canada: Environment Canada. p. 365-382.
Technical Development and Application of Soft Computing in Agricultural and Biological Engineering - (Proceedings)
Huang, Y., Lan, Y., Thomson, S.J., Fang, A., Hoffmann, W.C., Lacey, R. 2009. Technical Development and Application of Soft Computing in Agricultural and Biological Engineering. ASABE Annual International Meeting, June 21-24,2009, Reno, NV. p.095972.
Development and testing of a laboratory spray table methodology to bioassay simulated levels of aerial spray drift - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Parker, C.T., Lopez, J. 2009. Development and testing of a laboratory spray table methodology to bioassay aerial spray drift. Journal of ASTM International. 6(6):Paper ID JAI102125.
Evaluation of bollworm-tobacco budworm control strategies with ICEMM - (Peer Reviewed Journal)
Lan, Y., Ring, D.R., Benedict, J.H., Hoffmann, W.C. 2009. Evaluation of bollworm-tobacco budworm control strategies with ICEMM. International Agricultural Engineering Journal. XI:1114.
Evaluation of a proposed drift reduction technology high-speed wind tunnel testing protocol - (Peer Reviewed Journal)
Hoffmann, W.C., Fritz, B.K., Lan, Y. 2009. Evaluation of a proposed drift reduction technology high-speed wind tunnel testing protocol. Journal of ASTM International. 6:doi:10.1520/JAI102122.
Evaluation of the EPA Drift Reduction Technology (DRT) low-speed wind tunnel protocol - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Lan, Y. 2009. Evaluation of the EPA Drift Reduction Technology (DRT) low-speed wind tunnel protocol. Journal of ASTM International. 6:doi:10.1520/SAI102129.
Deposition and droplet sizing characterization of a laboratory spray table - (Peer Reviewed Journal)
Fritz, B.K., Parker, C.T., Lopez, J., Hoffmann, W.C., Schleider, P.G. 2008. Deposition and droplet sizing characterization of a laboratory spray table. Applied Engineering in Agriculture. 25:175-180.
Effect of Hexaflumuron on gustation and reproduction of adult boll weevil - (Peer Reviewed Journal)
Lopez, J., Latheef, M.A., Hoffmann, W.C. 2009. Effect of hexaflumuron on gustation and reproduction of adult boll weevil. Southwestern Entomologist. 34:31-41.
Spray characteristics affected by physical properties of adjuvants - (Proceedings)
Lan, Y., Fritz, B.K., Hoffmann, W.C., Bagley, W.E., Huang, Y., Martin, D.E., Lopez, J. 2008. Spray characteristics affected by physical properties of adjuvants. National Agricultural Aviation Association Meeting. Paper No. AA-08-005.
Aerial electrostatic-charged spray for deposition and efficacy against sweetpotato whitefly (Bemisia tabaci) on cotton - (Peer Reviewed Journal)
Latheef, M.A., Carlton, J.B., Kirk, I.W., Hoffmann, W.C. 2009. Aerial electrostatic-charged spray for deposition and efficacy against sweetpotato whitefly on cotton. Pest Management Science. 65:744-752.
Spray spectrum modifications through changes in airspeed to minimize drift - (Proceedings)
Fritz, B.K., Bagley, B., Hoffmann, W.C., Lan, Y. 2009. Spray spectrum modifications through changes in airspeed to minimize drift. National Agricultural Aviation Association Meeting. Paper No. AA08-002.
Deposition of insecticides on corn silks applied at high and low spray rates for control of corn earworm - (Proceedings)
Fritz, B.K., Lopez, J., Latheef, M.A., Martin, D.E., Hoffmann, W.C., Lan, Y. 2008. Deposition of insecticides on corn silks applied at high and low spray rates for control of corn earworm. National Agricultural Aviation Association Meeting. Paper No. AA08-004.
Development of an integration sensor and instrumentation system for measuring crop conditions - (Peer Reviewed Journal)
Lan, Y., Zhang, H., Lacey, R., Hoffmann, W.C., Wu, W. 2009. Development of an integrated sensor and instrumentation system for measuring crop conditions. International Agricultural Engineering Journal. XI:IT-081115.
Identification of stink bugs using an electronic nose - (Peer Reviewed Journal)
Lan, Y., Zheng, X., Westbrook, J.K., Lopez, J., Lacey, R., Hoffmann, W.C. 2008. Identification of stink bugs using an electronic nose. Journal of Bionic Engineering. 5(Suppl. 1):doi:10.1016/S1672-6529(08)60090-6.
Spray characterization of thermal fogging equipment typically used in vector control - (Peer Reviewed Journal)
Hoffmann, W.C., Walker, T.W., Fritz, B.K., Gwinn, T., Smith, V.L., Szumlas, D., Lan, Y., Huang, Y., Sykes, D., Quinn, B.P. 2008. Spray characterization of thermal fogging equipment typically used in vector control. Journal of the American Mosquito Control Association. 24:550-559.
Development of an integration sensor and instrumentation system for measuring crop conditions - (Abstract Only)
Lan, Y., Zhang, H., Lacey, R., Huang, Y., Hoffmann, W.C. 2008. Development of an integration sensor and instrumentation system for measuring crop conditions. ASA-CSSA-SSSA Annual Meeting, Houston, TX.
Effect of adjuvant physical properties on spray characteristics - (Abstract Only)
Lan, Y., Fritz, B.K., Hoffmann, W.C., Huang, Y. 2008. Effect of adjuvant physical properties on spray characteristics. ASABE Annual International Meeting. Paper No. 08-4174.
Evaluation of toxicity of selected insecticides against thrips on cotton in laboratory bioassays - (Peer Reviewed Journal)
Lopez, J., Fritz, B.K., Latheef, M.A., Lan, Y., Martin, D.E., Hoffmann, W.C. 2008. Evaluation of toxicity of selected insecticides against thrips on cotton in laboratory bioassays. Journal of Cotton Science. 12:188-194.
Using a surface plasmon resonance biosensor for rapid detection of salmonella typhimurium in chicken carcass - (Peer Reviewed Journal)
Lan, Y., Wang, S., Yin, Y., Hoffmann, W.C. 2008. Using a surface plasmon resonance biosensor for rapid detection of Salmonella typhimurium in chicken carcass. Journal of Bionic Engineering. 5:239-246.
Atmospheric effects on the fate of aerially applied agricultural sprays - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C. 2008. Atmospheric effects on the fate of aerially applied agricultural sprays. International Agricultural Engineering Journal. X:08008.
Development of an airborne remote sensing system for aerial applicators - (Proceedings)
Lan, Y., Huang, Y., Martin, D.E., Hoffmann, W.C., Fritz, B.K., Lopez, J. 2008. Development of an airborne remote sensing system for aerial applicators. Proceedings of the Annual Precision Ag Conference, July 20-23, 2008, Denver, CO. p. 5-25.
Variable rate fertilization for maize and its effects based on the site specific soil fertility and yield - (Peer Reviewed Journal)
Zhang, S., Lan, Y., Li, W., Hoffmann, W.C., Xu, Y., Ma, C. 2008. Variable rate fertilization for maize and its effects based on the site specific soil fertility and yield. International Agricultural Engineering Journal. X:IT-08002.
Development of a data acquisition and processing system for precision agriculture - (Peer Reviewed Journal)
Zhang, S., Lan, Y., Wu, W., Hoffmann, W.C., Chen, G. 2008. Development of a data acquisition and processing system for precision agriculture. International Agricultural Engineering Journal. X:IT-08011.
Development of an airborne remote sensing system for crop pest management: System integration and verification - (Peer Reviewed Journal)
Lan, Y., Huang, Y., Martin, D.E., Hoffmann, W.C. 2009. Development of an airborne remote sensing system for crop pest management: System integration and verification. Applied Engineering in Agriculture. 25(4):607-615.
Low-level atmospheric temperature inversions: Characteristics and impacts on agricultural applications - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Lan, Y., Thomson, S.J., Huang, Y. 2008. Low-level atmospheric temperature inversions: Characteristics and impacts on agricultural applications. International Agricultural Engineering Journal. X:PM-08001.
Development of an unmanned aerial vehicle-based remote sensing system for site-specific management in precision agriculture - (Proceedings)
Huang, Y., Lan, Y., Hoffmann, W.C., Fritz, B.K. 2008. Development of an unmanned aerial vehicle-based remote sensing system for site-specific management in precision agriculture. Proceedings of the 9th International Symposium on Precision Agriculture, Denver, CO.
Adult vial bioassays of insecticidal toxicity against cotton fleahopper, Pseudatomoscelis seriatus (Reuter) (Hemiptera: Miridae) - (Peer Reviewed Journal)
Lopez, J., Hoffmann, W.C., Latheef, M.A., Fritz, B.K., Martin, D.E., Lan, Y. 2008. Adult vial bioassays of insecticidal toxicity against cotton fleahopper, Pseudatomoscelis seriatus (Reuter) (Hemiptera: Miridae). Journal of Pesticide Science. 33:261-265.
Evaluation of aerial delivery systems for spray deposition and efficacy against sweet potato whitefly on cotton - (Peer Reviewed Journal)
Latheef, M.A., Kirk, I.W., Bouse, L.F., Carlton, J.B., Hoffmann, W.C. 2008. Evaluation of aerial delivery systems for spray deposition and efficacy against sweet potato whitefly on cotton. Applied Engineering in Agriculture. 24:415-422.
Laboratory evaluation of Novaluron for toxicity to nymphal instars of field collected southern green stink bug on cotton - (Peer Reviewed Journal)
Lopez, J., Lan, Y., Latheef, M.A., Hoffmann, W.C., Fritz, B.K., Martin, D.E. 2008. Laboratory evaluation of novaluron for toxicity to nymphal instars of field collected southern green stink bug on cotton. Southwestern Entomologist. 33:119-127.
Spray adjuvant effects on droplet size spectra measured by three laser-based systems - (Peer Reviewed Journal)
Hoffmann, W.C., Hewitt, A.J., Ross, J.B., Bagley, W.E., Martin, D.E., Fritz, B.K. 2008. Spray adjuvant effects on droplet size spectra measured by three laser-based systems. Journal of ASTM International. 5(6):Paper ID JAI101233.
Use of Airborne Multi-Spectral Imagery in Pest Management Systems - (Peer Reviewed Journal)
Huang, Y., Lan, Y., Hoffmann, W.C. 2008. Use of airborne multi-spectral imagery in pest management systems. International Agricultural Engineering Journal. X:07010.
Quantitative Assessment of Spray Deposition with Water-Sensitive Paper - (Proceedings)
Salyani, M., Zhu, H., Hoffmann, W.C., Sweeb, R.D., Pai, N. 2008. Quantitative Assessment of Spray Deposition with Water-Sensitive Paper. ASABE Annual International Meeting.ASABE Paper Number 083895
Development of an unmanned aerial vehicle-based spray system for highly accurate site-specific application - (Proceedings)
Huang, Y., Hoffmann, W.C., Fritz, B.K., Lan, Y. 2008. Development of an unmanned aerial vehicle-based spray system for highly accurate site-specific application. Proceedings of the ASABE Annual International Meeting, St. Joseph, MO. Paper No. 08-3909.
Drift reduction with drift control adjuvants - (Proceedings)
Lan, Y., Hoffmann, W.C., Fritz, B.K., Martin, D.E., Lopez, J. 2008. Drift reduction with drift control adjuvants. ASABE Annual International Meeting. Paper No. 07-1060.
Enhancement of data analysis through multisensor data fusion technology - (Proceedings)
Huang, Y., Lan, Y., Hoffmann, W.C., Lacey, R. 2007. Enhancement of data analysis through multisensor data fusion technology. ASABE Annual International Meeting. Paper No. 07-3002.
Development of a data acquisition and processing system for precision agriculture - (Proceedings)
Zhang, S., Lan, Y., Wu, W., Hoffmann, W.C., Chen, G. 2007. Development of a data acquisition and processing system for precision agriculture. ASABE Annual International Meeting. Paper No. 07-1067.
Variable rate fertilization for maize and its effects based on the site-specific soil fertility and yield - (Proceedings)
Zhang, S., Lan, Y., Li, W., Hoffmann, W.C., Xu, Y., Ma, C. 2007. Variable rate fertilization for maize and its effects based on the site-specific soil fertility and yield. ASABE Annual International Meeting. Paper No. 07-1066.
Effects of water hardness on spray droplet size under aerial application conditions - (Peer Reviewed Journal)
Hoffmann, W.C., Bagley, W.E., Fritz, B.K., Lan, Y., Martin, D.E. 2008. Effects of water hardness on spray droplet size under aerial application conditions. Applied Engineering in Agriculture. 24(1):11-14.
Development of a system for determining collection efficiency of spray samplers - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C. 2008. Development of a system for determining collection efficiency of spray samplers. Applied Engineering in Agriculture. 24:285-293.
Meteorological influences on mass accountability of aerially applied sprays - (Proceedings)
Fritz, B.K., Hoffmann, W.C. Meteorological influences on mass accountability of aerially applied sprays. Proceedings of the American Society of Agricultural and Biological Engineers International (ASABE). December 10, 2007, Reno, NV. Paper No. AA07-003.
Collection efficiency of various airborne spray flux samplers used in aerial application research - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C. 2008. Collection efficiency of various airborne spray flux samplers used in aerial application research. Journal of ASTM International. 5(1):Paper ID JAI01493.
Crop pest management with an aerial imaging system - (Proceedings)
Lan, Y., Huang, Y., Martin, D.E., Hoffmann, W.C. 2008. Crop pest management with an aerial imaging system. National Agricultural Aviation Association Meeting. ASABE Paper No. 07-005.
Remote Sensing and GIS Applications for Precision Areawide Pest Management: Implications for Homeland Security - (Book / Chapter)
Huang, Y., Lan, Y., Westbrook, J.K., Hoffmann, W.C. 2008. Remote sensing and GIS applications for precision areawide pest management: Implications for homeland security. In: Sui, D.Z., Cutter, S.L., editors. Geospatial Technologies and Homeland Security: Research Frontiers and Challenges. New York, NY: Springer. p. 242-256.
Aerial application methods for increasing spray deposition on wheat heads - (Peer Reviewed Journal)
Fritz, B.K., Hoffmann, W.C., Martin, D.E., Thomson, S.J. 2007. Aerial application methods for increasing spray deposition on wheat heads. Applied Engineering in Agriculture. 23(6):709-715.
Field evaluation of spinosad aerial applications for thrips control on cotton - (Peer Reviewed Journal)
Martin, D.E., Lopez, J., Hoffmann, W.C., Fritz, B.K., Lan, Y. 2007. Field evaluation of spinosad aerial applications for thrips control on cotton. Southwestern Entomologist. 32(4):221-228.
Drift reduction with drift control adjuvants - (Abstract Only)
Lan, Y., Hoffmann, W.C., Fritz, B.K., Martin, D.E., Lopez, J. 2007. Drift reduction with drift control adjuvants. ASABE Annual International Meeting. Paper No. 07-1060.
Airborne multi-spectral remote sensing with ground truth for areawide pest management - (Proceedings)
Lan, Y., Huang, Y., Hoffmann, W.C. 2007. Airborne multi-spectral remote sensing with ground truth for areawide pest management. Proceedings of the ASABE Annual International Meeting, St. Louis, MO. Paper No. 07-3004.
Asynoptic high resolution upper-air data for high impact weather events - (Abstract Only)
Zeitler, J.W., Witsaman, P., Foster, S., Hoffmann, W.C., Fritz, B.K. 2007. Asynoptic high resolution upper-air data for high impact weather events [abstract]. In: Proceedings of the American Meteorological Society Conference on Weather Analysis and Forecasting. Conference on Weather Analysis and Forecasting, June 25, 2007, Park City, Utah. Poster No. 1.48.
Asynoptic high resolution upper-air data for high impact weather events. - (Proceedings)
Zeitler, J.W., Witsaman, P., Foster, S., Hoffmann, W.C., Fritz, B.K. 2007. Asynoptic high resolution upper-air data for high impact weather events. Proceedings of the American Meteorological Society Conference on Weather Analysis and Forecasting, Park City, UT, June 25, 2007. Poster No. 1.48.
Development of a precision areawide pest management decision system for cotton - Preliminary study - (Abstract Only)
Lan, Y., Hoffmann, W.C., Westbrook, J.K. 2007. Development of a precision areawide pest management decision system for cotton - Preliminary study. Proceedings of World Cotton Research Conference, September 10-14, 2007, Lubbock, TX. CDROM.
Characterization of Truck Mounted Atomization Equipment Typically Used in Vector Control - (Peer Reviewed Journal)
Hoffmann, W.C., Walker, T.W., Martin, D.E., Barber, J.A.B., Gwinn, T., Smith, V.L., Szumlas, D., Lan, Y., Fritz, B.K. 2007. Characterization of truck-mounted atomization equipment typically used in vector control. Journal of the American Mosquito Control Association. 23(3):321-329.
Spray drift mitigation with spray mix adjuvants - (Peer Reviewed Journal)
Lan, Y., Hoffmann, W.C., Fritz, B.K., Martin, D.E., Lopez, J. 2008. Spray drift mitigation with spray mix adjuvants. Applied Engineering in Agriculture. 24(1):5-10.
Effects of Wind Speed on Aerosol Spray Penetration in Adult Mosquito Bioassay Cages - (Peer Reviewed Journal)
Hoffmann, W.C., Fritz, B.K., Farooq, M., Cooperband, M.F. 2008. Effects of wind speed on aerosol spray penetration in adult mosquito bioassay cages. Journal of the American Mosquito Control Association. 24:419-426.
Development of a PC-based data acquisition and control system - (Peer Reviewed Journal)
Lan, Y., Lin, X., Kocher, M.F., Hoffmann, W.C. 2007. Development of a PC-based data acquisition and control system. International Agricultural Engineering Journal. 9:1-11.
Enhancement of Data Analysis Through Multisensor Data Fusion Technology - (Abstract Only)
Huang, Y., Lan, Y., Hoffmann, W.C., Lacey, R. 2007. Enhancement of Data Analysis Through Multisensor Data Fusion Technology. Proceedings of the ASABE Annual International Meeting, St. Louis, MO. Paper No. 07-3002.
Droplet size characterization of hand-held atomization equipment typically used in vector control - (Peer Reviewed Journal)
Hoffmann, W.C., Walker, T.W., Smith, V.L., Martin, D.E., Fritz, B.K. 2007. Droplet-size characterization of handheld atomization equipment typically used in vector control. Journal of the American Mosquito Control Association. 23(3):315-320.
Agdisp Sensitivity to Crop Canopy Characterization - (Peer Reviewed Journal)
Hoffmann, W.C., Fritz, B.K., Martin, D.E. 2007. AGDISP sensitivity to crop canopy characterization. Transactions of the ASABE. 50:1117-1122.
Airborne multispectral remote sensing with ground truth for areawide pest management - (Abstract Only)
Lan, Y., Huang, Y., Hoffmann, W.C. 2007. Airborne multispectral remote sensing with ground truth for areawide pest management. Proceedings of the ASABE Annual International Meeting, St. Louis, MO. Paper No. 07-3004.
Multisensor Data Fusion for High Quality Data Analysis and Processing in Measurement and Instrumentation - (Peer Reviewed Journal)
Huang, Y., Lan, Y., Hoffmann, W.C., Lacey, R.E. 2007. Multisensor data fusion for high quality data analysis and processing in measurement and instrumentation. Journal of Bionics Engineering. 6:53-62.
Effectiveness of spray adjuvants on reduction of spray drift - (Proceedings)
Lan, Y., Hoffmann, W.C., Fritz, B.K., Martin, D.E., Lopez, J. 2006. Effectiveness of spray adjuvants on reduction of spray drift. ASABE Annual International Meeting, December 4, 2006, Orlando, Florida. Paper No. AA06-004.
Economic Analysis of Insect Control Strategies Using An Integrated Crop Ecosystem Management Model - (Peer Reviewed Journal)
Lan, Y., Benedict, J.H., Ring, D.R., Hoffmann, W.C. 2006. Economic analysis of insect control strategies using an integrated crop ecosystem management model. Agricultural Engineering International: The CIGR Ejournal. 8:1-18.
USDA-ARS Aerial Application Technology for Crop Production and Protection Group - Research Overview - (Proceedings)
Fritz, B.K., Hoffmann, W.C., Martin, D.E., Lopez, J., Lan, Y. 2006. USDA-ARS aerial application technology for crop production and protection group - research overview. In: Proceedings of the SERG-International and US Forestry Service Workshop, February 15-18, 2006, Banff, Canada, p. 25-28.
Aerial Application Methods for Increasing Spray Deposition on Wheat Heads - (Peer Reviewed Journal)
Fritz, B.K., Kirk, I.W., Hoffmann, W.C., Martin, D.E., Hofman, V., Hollingsworth, C., McMullen, M., Halley, S. 2006. Aerial application methods for increasing spray deposition on wheat heads. Applied Engineering in Agriculture. 22:357-364.
Aerial Application Methods for Increasing Spray Deposition on Wheat Heads - (Proceedings)
Fritz, B.K., Hoffmann, W.C., Martin, D.E. 2005. Aerial application methods for increasing spray deposition on wheat heads. In: Proceedings of the National Agricultural Aviation Association Meeting, December 4-7, 2005, Reno, Nevada. Paper No. AA05-006.
Novaluron as an ovicide: A model for evaluation of aerially-applied insectides. Part 2: Field Study - (Abstract Only)
Martin, D.E., Lopez, J., Hoffmann, W.C., Fritz, B.K. 2005. Novaluron as an ovicide: A model for evaluation of aerially-applied insectides. Part 2: Field Study. National Agricultural Aviation Association Meeting. Paper No. AA05-005.
A New Variable Flow Rate Nozzle for Aerial Application - (Abstract Only)
Bui, Q.D., Gardisser, D.R., Hoffmann, W.C. 2005. A new variable flow rate nozzle for aerial application [abstract]. American Society of Agricultural Engineers/National Agricultural Aviation Association. Paper No. AA05-008.
Field-collected and AGDISP-predicted spray flux from an aerial application - (Peer Reviewed Journal)
Hoffmann, W.C. 2006. Field-collected and AGDISP-predicted spray flux from an aerial application. Journal of ASTM International. 3:doi:10.1520/JAI12908.
Hi-Rise - Hazardous Incident Rapid in-Flight Support Effort: Use of Asynoptic Upper-Air Data to Improve Weather Forecasts at Wildland Fires and Other Hazardous Incidents - (Abstract Only)
Witsaman, P.G., Zeitler, J.W., Oaks, M.C., Murdoch, G.P., Nagle, S.R., Hoffmann, W.C., Fritz, B.K. 2005. HI-RISE - Hazardous incident rapid in-flight support effort: Use of asynoptic upper-air data to improve weather forecasts at wildland fires and other hazardous incidents. In: Proceedings of the Joint 6th Symposium on Fire and Forest Meteorology and 19th Interior West Fire Council Meeting, October 25-27, 2005, Canmore, Alberta, Canada. 2005 CDROM.
Temperature and Spray Adjuvant Effects on Droplet Velocity and Size - (Abstract Only)
Hoffmann, W.C. 2005. Temperature and spray adjuvant effects on droplet velocity and size [abstract]. In: Proceedings of the ASAE Annual International Meeting, July 17-20, 2005, Tampa, Florida. Paper No. 051151.
Spray Deposition and Drift from Two "medium" Nozzles - (Peer Reviewed Journal)
Hoffmann, W.C., Kirk, I.W. 2005. Spray deposition and drift from two medium nozzles. Transactions of the ASAE. 48:5-11.
Field Swath and Drift Analyses Techniques - (Peer Reviewed Journal) - (16-Nov-04)
Comparison of Three Imaging Systems for Water-Sensitive Papers - (Peer Reviewed Journal)
Hoffmann, W.C., Hewitt, A.J. 2005. Comparison of three imaging systems for water-sensitive papers. Applied Engineering in Agriculture. 21:961-964.
Crop and Canopy Effects of Spray Deposition and Drift - (Abstract Only)
Hoffmann, W.C. Crop and canopy effects of spray deposition and drift [abstract]. Proceedings of the International Conference on Pesticide Application for Drift Management, October 27-29, 2004, Waikoloa, Hawaii. 2004 CDROM.
Aerial methods for increasing spray deposits on wheat heads - (Proceedings)
Kirk, I.W., Fritz, B.K., Hoffmann, W.C. 2004. Aerial methods for increasing spray deposits on wheat heads. Proceedings of the American Society of Agricultural Engineers, August 1-4, 2004, Ottawa, Ontario, Canada. Paper No. 04-1029.
Deployment of Insecticides and Acaricides - (Book / Chapter)
Hoffmann, W.C. 2006. Deployment of insecticides and acaricides. In: All, J.N., Treacy, M.F., editors. ESA Handbook on Use and Management of Insecticides, Acaricides, and Transgenic Crops. St. Paul, MN: APS Press. p. 73-80.
Alternatives to Increase Aerial Spray Deposits for Fhb Control - (Proceedings)
Kirk, I.W., Fritz, B.K., Hoffmann, W.C. 2003. Alternatives to increase aerial spray deposits for FHB control. In: Proceedings of the National Fusarium Head Blight Forum, December 13-15, 2003, Bloomington, Minnesota. p. 88-91.
Comparison of Droplet Imaging Systems for Water-Sensitive Cards - (Proceedings)
Hoffmann, W.C., Hewitt, A.J. 2004. Comparison of droplet imaging systems for water-sensitive cards. Proceedings of Aspects of Applied Biology. 71:463-466.
Effect of aerial application parameters simulated on a spray table on insecticidal mortality of cotton aphids and stink bugs - (Proceedings)
Lopez, J., Latheef, M.A., Hoffmann, W.C., Kirk, I.W. 2003. Effect of aerial application parameters simulated on a spray table on insecticidal mortality of cotton aphids and stink bugs. Proceedings of the Beltwide Cotton Conference, January 7-10, 2003, Nashville, TN. p. 1490-1493.
Nozzle Classifications and You - (Trade Journal)
Hoffmann, W.C., Kirk, I.W. 2003. Nozzle classifications and you. Agricultural Aviation. 30(1):27-29.
Aerial Swath Widths for Ulv Malathion - (Proceedings) - (11-Jan-02)
Influence of Crop Canopy on Spray Deposition and Movement: Preliminary Results - (Peer Reviewed Journal) - (03-Dec-01)
Effects of Lowering Spray Boom in Flight on Swath Width and Drift - (Peer Reviewed Journal) - (01-Jun-00)
Sunlight Protection for Ulv Malathion - (Proceedings) - (08-Jan-00)
Preliminary Evaluation of Reduced Rates of Ulv Malathion - (Proceedings) - (08-Jan-00)
Aerial Electrostatic Ec Malathion 5 for Boll Weevil Control - (Proceedings) - (08-Jan-00)
Aerial Electrostatic Spray System Performance - (Peer Reviewed Journal) - (08-Jan-00)
A Preliminary Evaluation of a Wing Tip Modification Device (Ag-Tips) on Swath Width and Drift - (Proceedings) - (13-Dec-99)
Current Status and Future of Mexican Corn Rootworm Areawide Management in Texas - (Proceedings) - (22-Oct-99)
Application Parameter Effects on Efficacy of a Semiochemical-Based Insecticide - (Peer Reviewed Journal) - (01-Aug-98)
Corn Rootworm Control with a Semiochemical-Based Insecticide - (Proceedings) - (01-Dec-96)
Areawide Control of Corn Rootworms - (Peer Reviewed Journal) - (01-Dec-95)
ARS News Articles
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