Projecten per jaar
Uittreksel
In 2009, a project was started to develop an interactive and user friendly software to understand and improve the application of plant protection products in orchards. The focus was on improving the uniformity on the target, maintaining biological efficacy, avoiding exceeding of residue limits and reducing spray drift. This project includes a machine characterisation, field trials and development of a simulation model. This paper describes the results of the machine characterisation in controlled laboratory conditions which are used to further develop and validate the CFD orchard spray model. In this work, an axial fan sprayer, a cross-flow sprayer and a sprayer with individual spouts were characterised at different gear speeds and deflector settings.
Spray characteristics were measured using a PDPA laser based measuring set-up. The vertical spray liquid distribution was assessed with a vertical patternator at distances of 1.25, 1.625 and 2.45 m from the centre of the sprayer. The three dimensional air flow pattern was measured at different distances and heights. Finally, spray deposition and coverage and spray losses were assessed using five identical artificial pear trees. All measurements were conducted indoor and are used as an input and to validate a CFD orchard spray model.
The measuring results reflect important differences in airflow patterns and spray liquid distribution between the different techniques and demonstrate that the liquid distribution is directly linked with the airflow pattern. This airflow pattern strongly depends on the sprayer type. The results of the deposition measurements will give information about the interaction between air and spray flow and the canopy.
Spray characteristics were measured using a PDPA laser based measuring set-up. The vertical spray liquid distribution was assessed with a vertical patternator at distances of 1.25, 1.625 and 2.45 m from the centre of the sprayer. The three dimensional air flow pattern was measured at different distances and heights. Finally, spray deposition and coverage and spray losses were assessed using five identical artificial pear trees. All measurements were conducted indoor and are used as an input and to validate a CFD orchard spray model.
The measuring results reflect important differences in airflow patterns and spray liquid distribution between the different techniques and demonstrate that the liquid distribution is directly linked with the airflow pattern. This airflow pattern strongly depends on the sprayer type. The results of the deposition measurements will give information about the interaction between air and spray flow and the canopy.
Oorspronkelijke taal | Engels |
---|---|
Titel | International Advances in Pesticide Application |
Editors | P G Anderson, P Balsari, P I Carpenter, S E Cooper, C R Glass, B Magri, P C H Miller, C Mountford-Smith, T H Robinson, D Stock, W A Taylor, J van de Zande |
Aantal pagina’s | 8 |
Volume | 114 |
Plaats productie | Warwick, UK |
Uitgeverij | Association of Applied Biologists |
Publicatiedatum | 2012 |
Pagina's | 395-403 |
Publicatiestatus | Gepubliceerd - 2012 |
Evenement | International Advances in Pesticide Application (2012) - Wageningen, Nederland Duur: 10-jan.-2012 → 12-jan.-2012 http://www.aab.org.uk |
Vingerafdruk
Bekijk de onderzoeksthema's van 'Assessment of orchard sprayers using Laboratory trials'. Samen vormen ze een unieke vingerafdruk.Projecten
- 1 Afgerond
-
FRUITSPRAY: Integrale evaluatie en optimalisatie van het toepassingsproces van gewasbeschermingsmiddelen voor diverse fruitteeltsystemen in functie van het toekomstig wettelijke en commerciële kader
Nuyttens, D. (Projectverantwoordelijke) & Dekeyser, D. (Onderzoeker)
1/09/09 → 31/12/13
Project: Onderzoek