[en] Spray retention, i.e. the overall capture of spray droplets by plants on initial or subsequent
impact, and after loss due to run-off, is an important stage in the spray application process
as droplet losses may result in reduced efficacy, economic loss, and environmental
contamination. The aim of this exploratory study is to determine whether a new method
based on calculating the volumetric proportions per impact type, i.e. adhesion, rebound
and shatter, can be used to predict spray retention. These volumetric proportions are
calculated based on logistic regression models, derived from vision-based droplet characteristics
and impact assessments, and laser-based spray characteristics. The advantages
and limitations of such a method are explored. The volumetric proportions per impact type
on a horizontal, synthetic hydrophobic surface were determined for four different nozzles
(XR 110 01 VS flat-fan nozzle, XR 110 04 VS flat-fan nozzle, XR 110 08 VS flat-fan nozzle and
AI 110 08 VS air-induction nozzle) under controlled realistic conditions, and compared to
the results of a retention test. The volumetric proportions of adhesion were much lower
than the relative retentions, indicating that a considerable amount of rebound and shatter
also contributed to final retention. The method should thus be improved by including the
droplets retained after first impact and the retained proportions of partial droplet fragmentation
but it is nevertheless considered a promising technique.
Research Center/Unit :
ILVO
Disciplines :
Agriculture & agronomy
Author, co-author :
Zwertvaegher, Ingrid; Instituut voor Landbouw- en Visserijonderzoek = Institute for Agricultural and Fisheries Research > Technology and Food Science Unit
Verhaeghe, Micheline; Katholieke Universiteit Leuven - KUL > Department Biosystems
Brusselman, Eva; Instituut voor Landbouw- en Visserijonderzoek = Institute for Agricultural and Fisheries Research > Technology and Food Science Unit
Verboven, Pieter; Katholieke Universiteit Leuven - KUL > Department Biosystems
Lebeau, Frédéric ; Université de Liège - ULiège > Sciences et technologie de l'environnement > Agriculture de précision
Massinon, Mathieu ; Université de Liège - ULiège > Sciences et technologie de l'environnement > Agriculture de précision
Nicolaï, Bart; Katholieke Universiteit Leuven - KUL > Department Biosystems
Nuyttens, David; Instituut voor Landbouw- en Visserijonderzoek = Institute for Agricultural and Fisheries Research > Technology and Food Science Unit
Language :
English
Title :
The impact and retention of spray droplets on a horizontal hydrophobic surface
Publication date :
October 2014
Journal title :
Biosystems Engineering
ISSN :
1537-5110
eISSN :
1537-5129
Publisher :
Academic Press
Volume :
126
Pages :
82-91
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Agency for Innovation by Science and Technology (IWT project 080528) of the Flemish government
Funders :
IWT - Agency for Innovation by Science and Technology
Bergeron V. Designing intelligent fluids for controlling spray applications. Comptes Rendus Physique 2003, 4(2):211-219.
Bertola V. Some applications of controlled drop deposition on solid surfaces. Recent Patents on Mechanical Engineering 2008, 1(3):167-174.
Bhushan B., Jung Y.C. Natural and biomimetic artificial surfaces for superhydrophobicity, self-cleaning, low adhesion, and drag reduction. Progress in Materials Science 2011, 56(1):1-108.
Boukhalfa H.H., Massinon M., Belhamra M., Lebeau F. Contribution of spray droplet pinning fragmentation to canopy retention. Crop Protection 2014, 56:91-97.
Butler Ellis M.C., Swan T., Miller P.C.H., Waddelow S., Bradley A., Tuck C.R. Design factors affecting spray characteristics and drift performance of air induction nozzles. Biosystems Engineering 2002, 82(3):289-296.
Butler Ellis M.C., Webb D.A., Western N.M. The effect of different spray liquids on the foliar retention of agricultural sprays by wheat plants in a canopy. Pest Management Science 2004, 60(8):786-794.
Codis S., Bonicel J.F., Diouloufet G., Douzals J.P., Hebrard O., Montegano P. EvaSprayViti: a new tool for sprayer's agro-environmental performance assessment. 12th Workshop on Spray Application Techniques in Fruit Growing 2013.
Cooper S.E., Taylor B.P. The distribution and retention of sprays on contrasting targets using air-inducing and conventional nozzles at two wind speeds. Proceedings of the Brighton Crop Protection Conference - Weeds 1999, 461-466.
Crease G.J., Hall F.R., Thacker J.R.M. Reflection of agricultural sprays from leaf surfaces. Journal of Environmental Science and Health Part B - Pesticides Food Contaminants and Agricultural Wastes 1991, 26(4):383-407.
Dong X., Zhu H., Yang X. Three-dimensional imaging system for analyses of dynamic droplet impaction and deposit formation on leaves. Transactions of the Asabe 2013, 56(5):1641-1651.
Durickovic B., Varland K. Between bouncing and splashing: Water drops on a solid surface 2005, Applied Mathematics thesis, University of Arizona, USA.
Faggion F., Miller P.C.H., Butler Ellis M.C. Techniques for assessing the quantity of included air in droplets produced by air induction nozzles. International Advances in Pesticide Application 2006, Vol. 77:163-170.
Foqué D., Nuyttens D. Effects of nozzle type and spray angle on spray deposition in ivy pot plants. Pest Management Science 2011, 67(2):199-208.
Forster W.A., Mercer G.N., Schou W.C. Spray droplet impaction models and their use within AGDISP software to predict retention. New Zealand Plant Protection 2012, 65:85-92.
Forster W.A., Steele K.D., Gaskin R.E., Zabkiewicz J.A. Spray retention models for vegetable crops: preliminary investigation. New Zealand Plant Protection 2004, 57:260-265.
Koch K., Barthlott W. Superhydrophobic and superhydrophilic plant surfaces: an inspiration for biomimetic materials. Philosophical Transactions of the Royal Society A - Mathematical Physical and Engineering Sciences 2009, 367(1893):1487-1509.
Lammertyn J., Aerts M., Verlinden B.E., Schotsmans W., Nicolai B.M. Logistic regression analysis of factors influencing core breakdown in 'Conference' pears. Postharvest Biology and Technology 2000, 20(1):25-37.
Mao T., Kuhn D.C.S., Tran H. Spread and rebound of liquid droplets upon impact on flat surfaces. American Institute of Chemical Engineers 1997, 43(9):2169-2179.
Massinon M., Lebeau F. Comparison of spray retention on synthetic superhydrophobic surface with retention on outdoor grown wheat leaves. Aspects of Applied Biology 2012, 261-268.
Massinon M., Lebeau F. Experimental method for the assessment of agricultural spray retention based on high-speed imaging of drop impact on a synthetic superhydrophobic surface. Biosystems Engineering 2012, 112(1):56-64.
Massinon M., Lebeau F. Review of physicochemical processes involved in agrochemical spray retention. Biotechnology, Agronomy, Society and Environment 2013, 17(3):494-504.
Mercer G., Sweatman W.L., Elvin A., Caunce J., Fulford G., Harper S., et al. Process driven models for spray retention by plants. Proceedings of the 2006 Mathematics-In-Industry Study Group 2007, 57-85.
Miller P.C.H., Butler Ellis M.C. Effects of formulation on spray nozzle performance for applications from ground-based boom sprayers. Crop Protection 2000, 19(8):609-615.
Mota A.A.B., Antuniassi U.R., Chechetto R.G., de Oliveira R.B., Silva A.C.A.E. Effect of adjuvants on the amount of air included in droplets generated by spray nozzles. Engenharia Agricola 2013, 33(6):1281-1288.
Nuyttens D., Baetens K., De Schampheleire M., Sonck B. Effect of nozzle type, size and pressure on spray droplet characteristics. Biosystems Engineering 2007, 97(3):333-345.
Nuyttens D., De Schampheleire M., Verboven P., Brusselman E., Dekeyser D. Droplet size and velocity characteristics of agricultural sprays. Transactions of the Asabe 2009, 52(5):1471-1480.
Reichard D.L., Cooper J.A., Bukovac M.J., Fox R.D. Using a videographic system to assess spray droplet impaction and reflection from leaf and artificial surfaces. Pesticide Science 1998, 53(4):291-299.
Rioboo R., Voué M., Vaillant A., De Coninck J. Drop impact on porous superhydrophobic polymer surfaces. Langmuir 2008, 24(24):14074-14077.
Spillman J.J. Spray impaction, retention and adhesion: an introduction to basic characteristics. Pesticide Science 1984, 15(2):97-106.
Sun T.L., Feng L., Gao X.F., Jiang L. Bioinspired surfaces with special wettability. Accounts of Chemical Research 2005, 38(8):644-652.
Taylor P. The wetting of leaf surfaces. Current Opinion in Colloid & Interface Science 2011, 16(4):326-334.
Yan Y.Y., Gao N., Barthlott W. Mimicking natural superhydrophobic surfaces and grasping the wetting process: a review on recent progress in preparing superhydrophobic surfaces. Advances in Colloid and Interface Science 2011, 169(2):80-105.
Zabkiewicz J.A. Spray formulation efficacy - holistic and futuristic perspectives. Crop Protection 2007, 26(3):312-319.
