Article (Scientific journals)
Spray droplet impaction outcomes for different plant species and spray formulations
Massinon, Mathieu; De Cock, Nicolas; Forster, W. Alison et al.
2017In Crop Protection, 99, p. 65-75
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Keywords :
Droplet impaction; adjuvants; wettability; leaf surface roughness; leaf surface chemistry; adhesion; bounce; shatter; pinning
Abstract :
[en] A track-sprayer combined with a high-speed camera were used to visualize and identify droplet impaction outcomes for three formulations (water, 0.1% LI 700® (lecithin, a mixture of soya oils, propionic acid and surfactants) in water and 0.1% Pulse® (non-ionic surfactant, trisiloxane ethoxylate) in water) on four plant species (bean (Vicia faba L.), avocado (Persea americana L.), barnyard grass (Echinochloa crus-galli L. P. Beauv.) and cabbage (Brassica oleracea L.)) selected to represent a wide range of leaf surface characters. Droplet sizes and velocities were measured by image analysis and a multiple hypothesis tracking algorithm. Impaction outcomes were categorized into adhesion, bounce, or shatter. The probability of each outcome was estimated from logistic regression models related to the dimensionless Weber number. This approach is in contrast to various deterministic threshold criteria for droplet bounce or shatter that have been used to model droplet impaction events on leaves. It also provides a simple visual and numerical presentation of the complexity of impaction processes, and the relative influence of leaf surface character versus formulation for droplets with different impaction energies.
Disciplines :
Agriculture & agronomy
Author, co-author :
Massinon, Mathieu ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Gestion durable des bio-agresseurs
De Cock, Nicolas ;  Université de Liège > Ingénierie des biosystèmes (Biose) > Biosystems Dynamics and Exchanges
Forster, W. Alison;  Plant Protection Chemistry New Zealand
Nairn, Justin J.;  Plant Protection Chemistry New Zealand
McCue, Scott W.;  Queensland University of Technology > Science and Engineering Faculty > Mathematical Sciences, Applied and Computational Mathematics
Zabkiewicz, Jerzy A.;  SciCon Scientific Consultants Ltd (New Zealand)
Lebeau, Frédéric  ;  Université de Liège > Ingénierie des biosystèmes (Biose) > Biosystems Dynamics and Exchanges
Language :
English
Title :
Spray droplet impaction outcomes for different plant species and spray formulations
Publication date :
03 May 2017
Journal title :
Crop Protection
ISSN :
0261-2194
eISSN :
1873-6904
Publisher :
Elsevier Science
Volume :
99
Pages :
65-75
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Subside fédéral pour la recherche
Available on ORBi :
since 18 June 2017

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