{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,2]],"date-time":"2026-02-02T05:03:54Z","timestamp":1770008634404,"version":"3.49.0"},"reference-count":39,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2016,4,8]],"date-time":"2016-04-08T00:00:00Z","timestamp":1460073600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004837","name":"Spanish Ministry of Science and Innovation","doi-asserted-by":"publisher","award":["AGL2007-66093-C04-03"],"award-info":[{"award-number":["AGL2007-66093-C04-03"]}],"id":[{"id":"10.13039\/501100004837","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004837","name":"Spanish Ministry of Science and Innovation","doi-asserted-by":"publisher","award":["AGL2010-22304-04-C03-03"],"award-info":[{"award-number":["AGL2010-22304-04-C03-03"]}],"id":[{"id":"10.13039\/501100004837","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004837","name":"Spanish Ministry of Science and Innovation","doi-asserted-by":"publisher","award":["AGL2013-48297-C2-2-R"],"award-info":[{"award-number":["AGL2013-48297-C2-2-R"]}],"id":[{"id":"10.13039\/501100004837","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Field measurements of spray drift are usually carried out by passive collectors and tracers. However, these methods are labour- and time-intensive and only provide point- and time-integrated measurements. Unlike these methods, the light detection and ranging (lidar) technique allows real-time measurements, obtaining information with temporal and spatial resolution. Recently, the authors have developed the first eye-safe lidar system specifically designed for spray drift monitoring. This prototype is based on a 1534 nm erbium-doped glass laser and an 80 mm diameter telescope, has scanning capability, and is easily transportable. This paper presents the results of the first experimental campaign carried out with this instrument. High coefficients of determination (R2 &gt; 0.85) were observed by comparing lidar measurements of the spray drift with those obtained by horizontal collectors. Furthermore, the lidar system allowed an assessment of the drift reduction potential (DRP) when comparing low-drift nozzles with standard ones, resulting in a DRP of 57% (preliminary result) for the tested nozzles. The lidar system was also used for monitoring the evolution of the spray flux over the canopy and to generate 2-D images of these plumes. The developed instrument is an advantageous alternative to passive collectors and opens the possibility of new methods for field measurement of spray drift.<\/jats:p>","DOI":"10.3390\/s16040499","type":"journal-article","created":{"date-parts":[[2016,4,8]],"date-time":"2016-04-08T21:02:38Z","timestamp":1460149358000},"page":"499","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Measurement of Spray Drift with a Specifically Designed Lidar System"],"prefix":"10.3390","volume":"16","author":[{"given":"Eduard","family":"Gregorio","sequence":"first","affiliation":[{"name":"Research Group in AgroICT &amp; Precision Agriculture, Department of Agricultural and Forest Engineering, Universitat de Lleida (UdL)\u2014Agrotecnio Center, Edifici CREA, c\/Pere de Cabrera s\/n, Lleida 25001, Spain"}]},{"given":"Xavier","family":"Torrent","sequence":"additional","affiliation":[{"name":"Research Group in AgroICT &amp; Precision Agriculture, Department of Agricultural and Forest Engineering, Universitat de Lleida (UdL)\u2014Agrotecnio Center, Edifici CREA, c\/Pere de Cabrera s\/n, Lleida 25001, Spain"}]},{"given":"Santiago","family":"Planas de Mart\u00ed","sequence":"additional","affiliation":[{"name":"Research Group in AgroICT &amp; Precision Agriculture, Department of Agricultural and Forest Engineering, Universitat de Lleida (UdL)\u2014Agrotecnio Center, Edifici CREA, c\/Pere de Cabrera s\/n, Lleida 25001, Spain"},{"name":"Department of Agriculture, Livestock, Fisheries and Food, Generalitat de Catalunya, Lleida 25198, Spain"}]},{"given":"Francesc","family":"Solanelles","sequence":"additional","affiliation":[{"name":"Department of Agriculture, Livestock, Fisheries and Food, Generalitat de Catalunya, Lleida 25198, Spain"}]},{"given":"Ricardo","family":"Sanz","sequence":"additional","affiliation":[{"name":"Research Group in AgroICT &amp; Precision Agriculture, Department of Agricultural and Forest Engineering, Universitat de Lleida (UdL)\u2014Agrotecnio Center, Edifici CREA, c\/Pere de Cabrera s\/n, Lleida 25001, Spain"}]},{"given":"Francesc","family":"Rocadenbosch","sequence":"additional","affiliation":[{"name":"Remote Sensing Laboratory, Department of Signal Theory and Communications, Universitat Polit\u00e8cnica de Catalunya (UPC)\/IEEC, Barcelona 08034, Spain"}]},{"given":"Joan","family":"Masip","sequence":"additional","affiliation":[{"name":"Research Group in AgroICT &amp; Precision Agriculture, Department of Agricultural and Forest Engineering, Universitat de Lleida (UdL)\u2014Agrotecnio Center, Edifici CREA, c\/Pere de Cabrera s\/n, Lleida 25001, Spain"}]},{"given":"Manel","family":"Ribes-Dasi","sequence":"additional","affiliation":[{"name":"Research Group in AgroICT &amp; Precision Agriculture, Department of Agricultural and Forest Engineering, Universitat de Lleida (UdL)\u2014Agrotecnio Center, Edifici CREA, c\/Pere de Cabrera s\/n, Lleida 25001, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6746-2830","authenticated-orcid":false,"given":"Joan","family":"Rosell-Polo","sequence":"additional","affiliation":[{"name":"Research Group in AgroICT &amp; Precision Agriculture, Department of Agricultural and Forest Engineering, Universitat de Lleida (UdL)\u2014Agrotecnio Center, Edifici CREA, c\/Pere de Cabrera s\/n, Lleida 25001, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2016,4,8]]},"reference":[{"key":"ref_1","unstructured":"International Standard Equipment for Crop Protection. Methods for Field Measurement of Spray Drift. ISO 22866. Available online: http:\/\/www.iso.org\/iso\/iso_catalogue\/catalogue_tc\/catalogue_detail.htm?csnumber=35161."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"S67","DOI":"10.1016\/0021-8502(96)00106-1","article-title":"Efficiency of the inertial wind capture of pesticide aerosols by vegetation species","volume":"27","author":"Makarov","year":"1996","journal-title":"J. Aerosol Sci."},{"key":"ref_3","first-page":"1359","article-title":"Significance of the long range transport of pesticides in the atmosphere","volume":"71","author":"Unsworth","year":"1999","journal-title":"Pure Appl. Chem."},{"key":"ref_4","unstructured":"Elliott, J.G., and Wilson, B.J. (1983). The Influence of Weather on the Efficiency and Safety of Pesticide Application: The Drift of Herbicides, The British Crop Protection Council."},{"key":"ref_5","first-page":"419","article-title":"Field studies on exposure, effects and risk mitigation of aquatic nonpoint-source insecticide pollution: A review","volume":"33","author":"Schulz","year":"2004","journal-title":"J. Environ. Qual."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"116","DOI":"10.1016\/j.cropro.2012.06.001","article-title":"Risk assessment of pesticide spray drift form citrus applications with sir-blast sprayers in Spain","volume":"42","author":"Cunha","year":"2012","journal-title":"Crop Prot."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"162","DOI":"10.1016\/j.biosystemseng.2010.05.017","article-title":"Bystander exposure to pesticide spray drift: New data for model development and validation","volume":"107","author":"Lane","year":"2010","journal-title":"Biosyst. Eng."},{"key":"ref_8","first-page":"1","article-title":"Studies on spray drift of plant protection products","volume":"305","author":"Ganzelmeier","year":"1995","journal-title":"Mitt. Biol. Bundesanst. Land. Forstwirtsch. Berl. Dahl."},{"key":"ref_9","first-page":"1","article-title":"Agrochemical spray drift; assessment and mitigation\u2014A review","volume":"46","author":"Felsot","year":"2011","journal-title":"J. Eviron. Sci. Health B"},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Matthews, G.A., and Hislop, E.C. (1993). Application Technology for Crop Protection, Centre for Agricultural Bioscience International.","DOI":"10.1079\/9780851988344.0000"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"83","DOI":"10.1016\/j.atmosenv.2013.09.028","article-title":"LIDAR as an alternative to passive collectors to measure pesticide spray drift","volume":"82","author":"Gregorio","year":"2014","journal-title":"Atmos. Environ."},{"key":"ref_12","first-page":"31","article-title":"Difficulties to apply ISO 22866 requirements for drift measurement. A particular case of traditional olive tree plantations","volume":"132","author":"Llorens","year":"2016","journal-title":"Asp. Appl. Biol."},{"key":"ref_13","first-page":"83","article-title":"The impaction of aerosol particles on cylinders, spheres, ribbons and discs","volume":"10","author":"May","year":"1967","journal-title":"Ann. Occup. Hyg."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Matthews, G.A., and Hislop, E.C. (1993). Application Technology for Crop Protection, Centre for Agricultural Bioscience International.","DOI":"10.1079\/9780851988344.0000"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"5183","DOI":"10.1016\/j.atmosenv.2005.05.019","article-title":"Emission of pesticides to the air during sprayer application: A bibliographic review","volume":"39","author":"Gil","year":"2005","journal-title":"Atmos. Environ."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1573","DOI":"10.13031\/2013.13322","article-title":"Droplet spectra and wind tunnel evaluation of venture and pre-orifice nozzles","volume":"42","author":"Derksen","year":"1999","journal-title":"Trans. ASAE"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"271","DOI":"10.1016\/j.biosystemseng.2009.04.001","article-title":"Influence of nozzle type and size on drift potential by means of different tunnel evaluation methods","volume":"103","author":"Nuyttens","year":"2009","journal-title":"Biosyst. Eng."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1482","DOI":"10.1016\/j.cropro.2006.12.012","article-title":"A test bench for the classification of boom sprayers according to drift risk","volume":"26","author":"Balsari","year":"2007","journal-title":"Crop Prot."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"58","DOI":"10.1016\/j.cropro.2013.10.018","article-title":"Determination of drift potential of different flat fan nozzles on a boom sprayer using a test bench","volume":"56","author":"Gil","year":"2014","journal-title":"Crop Prot."},{"key":"ref_20","first-page":"1","article-title":"Nozzle classification for drift reduction in orchard spraying: Identification of drift reduction class threshold nozzles","volume":"10","author":"Holterman","year":"2008","journal-title":"Agric. Eng. Int. CIGR J."},{"key":"ref_21","unstructured":"Planas, S., Solanelles, F., Torrent, X., Camp, F., Gregorio, E., and Rosell, J.R. (2013, January 26\u201328). Comparing standardized methods for potential drift assessment. Proceedings of the 12th Workshop on Spray Application Techniques in Fruit Growing, Valencia, Spain."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1523","DOI":"10.13031\/2013.31183","article-title":"A rapid acquisition lidar for aerial spray diagnostics","volume":"32","author":"Hoff","year":"1989","journal-title":"Trans. ASAE"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"621","DOI":"10.1080\/03601239409372897","article-title":"Utilizing vortex behaviour to minimize drift","volume":"29","author":"Mickle","year":"1994","journal-title":"J. Eviron. Sci. Health B"},{"key":"ref_24","first-page":"372","article-title":"Influence of aircraft vortices on spray cloud behaviour","volume":"12","author":"Mickle","year":"1996","journal-title":"J. Am. Mosq. Contr."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"15","DOI":"10.1016\/S0168-1923(97)00056-7","article-title":"A comparison of spray drift predictions to lidar data","volume":"88","author":"Stoughton","year":"1997","journal-title":"Agric. For. Meteorol."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"49","DOI":"10.1016\/S0168-1923(99)00084-2","article-title":"Response of spray drift from aerial applications at forest edge to atmospheric stability","volume":"100","author":"Miller","year":"2000","journal-title":"Agr. For. Meteorol."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"351","DOI":"10.13031\/2013.41373","article-title":"Effect of atmospheric conditions on coverage of fogger applications in a desert surface boundary layer","volume":"55","author":"Miller","year":"2012","journal-title":"Trans. ASABE"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1513","DOI":"10.13031\/2013.22043","article-title":"Dispersion of fine spray from aerial applications in stable atmospheric conditions","volume":"49","author":"Hiscox","year":"2006","journal-title":"Trans. ASABE"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1615\/AtomizSpr.2011002846","article-title":"Extrapolation of droplet catch measurements in aerosol application treatments","volume":"21","author":"Khot","year":"2011","journal-title":"Atomization Spray"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"516","DOI":"10.3390\/s130100516","article-title":"Use of a terrestrial lidar sensor for drift detection in vineyard spraying","volume":"13","author":"Gil","year":"2013","journal-title":"Sensors"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"3650","DOI":"10.3390\/s150203650","article-title":"Eye-safe lidar system for pesticide spray drift measurement","volume":"15","author":"Gregorio","year":"2015","journal-title":"Sensors"},{"key":"ref_32","unstructured":"Safety of Laser Products\u2014Part 1: Equipment Classification and Requirements. IEC 60825-1. Available online: https:\/\/webstore.iec.ch\/publication\/3587."},{"key":"ref_33","unstructured":"Measures, R.M. (1992). Laser Remote Sensing: Fundamentals and Applications, Krieger Publishing Co."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Hinkley, E.D. (1976). Laser Monitoring of the Atmosphere, Springer.","DOI":"10.1007\/3-540-07743-X"},{"key":"ref_35","unstructured":"Gregorio, E., Torrent, X., Solanelles, F., Sanz, R., Rocadenbsch, F., Masip, J., Ribes-Dasi, M., Planas, S., and Rosell-Polo, J.R. (2015, January 15\u201318). First measurements with a lidar systems specifically designed for spray drift monitoring. Proceedings of the 13th Workshop on Spray Application Techniques in Fruit Growing, Lindau, Germany."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"1128","DOI":"10.13031\/2013.23622","article-title":"The influence of operator controlled variables on spray drift from field crop sprayers","volume":"50","author":"Nuyttens","year":"2007","journal-title":"Trans. ASABE"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"696","DOI":"10.1175\/JTECH1755.1","article-title":"Scanning eye-safe elastic backscatter lidar at 1.54 \u03bcm","volume":"22","author":"Spuler","year":"2005","journal-title":"J. Atmos. Ocean. Technol."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"063546","DOI":"10.1117\/1.JRS.6.063546","article-title":"Parameter design of a biaxial lidar ceilometer","volume":"6","author":"Gregorio","year":"2012","journal-title":"J. Appl. Remote Sens."},{"key":"ref_39","unstructured":"International Standard Equipment for Crop Protection. Methods for the laboratory measurement of spray drift\u2014Wind tunnels. ISO 22856. Available online: http:\/\/www.iso.org\/iso\/iso_catalogue\/catalogue_tc\/catalogue_detail.htm?csnumber=41187."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/16\/4\/499\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T19:21:58Z","timestamp":1760210518000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/16\/4\/499"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,4,8]]},"references-count":39,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2016,4]]}},"alternative-id":["s16040499"],"URL":"https:\/\/doi.org\/10.3390\/s16040499","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2016,4,8]]}}}