Reference : Assessment of pesticide application method efficiency by high-speed image analysis
Scientific congresses and symposiums : Unpublished conference
Engineering, computing & technology : Multidisciplinary, general & others
Life sciences : Agriculture & agronomy
http://hdl.handle.net/2268/124786
Assessment of pesticide application method efficiency by high-speed image analysis
English
Massinon, Mathieu mailto [Université de Liège - ULg > Sciences et technologie de l'environnement > Mécanique et construction >]
Denis, Thierry mailto [> >]
Perriot, Benjamin mailto [> >]
Destain, Marie-France mailto [Université de Liège - ULg > Sciences et technologie de l'environnement > Mécanique et construction >]
Lebeau, Frédéric mailto [Université de Liège - ULg > Sciences et technologie de l'environnement > Mécanique et construction >]
8-Jul-2012
6
No
No
International
International conference of agricultural engineers
du 8 au 12 juillet 2012
EUrAgEng - CIGR
Valencia
Spain
[en] Spray retention ; Field trials ; Blackgrass ; Reduced volume application ; High-speed imaging
[en] This paper investigates if increased blackgrass weeding efficiency by reduced volume per hectare observed during 2010 Arvalis field trials may be related to increased pesticide application method efficiency. Retention on blackgrass leaves was assessed by an image analysis method. The setup consists of a high-speed camera shooting drop impact on horizontal leaf target. An herbicide (Archipel® [125 g/ha] + Actirob® [1 l/ha]) was sprayed at the usual volume of 150 l/ha and at a reduced volume of 65 l/ha. Adjuvants use (Epsotop® [1%] + Heliosol® [0.5%]) was also evaluated at 65 l/ha to highlight the effect of mixture surface tension modification. Drop properties before impact were extracted by image analysis and a phase diagram derived. Volumetric proportions of impact types are determined inside 11 energy classes to assess the effect of formulation and application method.

The volume median diameter (VMD) before impact was slightly decreased by the reduction to 65 l/ha because of nozzle and pressure changes and also by the use of the adjuvants leading to the reduction of surface tension. Without adjuvants the reduction to 65l/ha increased the proportion of adhesion while rebound remained unchanged and fragmentation decreased. With adjuvants, drop fragmentation occurs for a lower energy class but the proportion of fragmentation also decreases with because of reduced VMD. A slight effect on the transitions between impact classes was observed because of formulation concentration change at reduced volume/hectare. A major effect of adjuvants on retention was highlighted as bouncing disappeared.
Researchers
http://hdl.handle.net/2268/124786

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Open access
eurageng2012 full paper.pdfAuthor postprint1.35 MBView/Open

Additional material(s):

File Commentary Size Access
Open access
massinon_tuesday_1245.pdf1.43 MBView/Open

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.