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An integrated study to improve spray deposition in a dense crop with a horizontal leaf position

Dieter Foqué (UGent) , Jan Pieters (UGent) and David Nuyttens
(2012) Aspects of Applied Biology. 114. p.355-362
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Abstract
Flemish greenhouse growers predominantly use handheld spray guns and spray lances for their crop protection purposes, despite the heavy workload and high risk for operator exposure associated with these techniques. These spray application techniques have shown to be less effective than spray boom equipment under many conditions. Handheld spraying techniques are less expensive, however, and they are more flexible in use. Many Flemish growers also erroneously believe that high spray volumes and pressures are needed to assure good plant protection. This paper summarises the results of a whole series of laboratory trials to optimize the depositions of a horizontal spray boom system in a dense ivy crop with a horizontal leaf position. The effect of nozzle type, spray volume, spray direction, air support and the number of passes was evaluated. In total, seventeen spray application techniques were evaluated. Overall, the use of air support resulted in the most uniform spray distribution because of an improved spray penetration and a good coverage of the lower sides of the leaves. The use of air support was most effective when combined with a medium droplet size extended range flat-fan nozzle at 3.0 bar with a 30° forward or a standard 0° spray angle and a spray volume of 1000 L ha-1. Without air support, a 30° forward angle lead to higher depositions within the canopy as well.
Keywords
nozzle type, ivy pot plants, spray boom settings, spray angle, air support, horizontal spray boom system, spray volume

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Chicago
Foqué, Dieter, Jan Pieters, and David Nuyttens. 2012. “An Integrated Study to Improve Spray Deposition in a Dense Crop with a Horizontal Leaf Position.” In Aspects of Applied Biology, 114:355–362. Warwick, UK: Association of Applied Biologists.
APA
Foqué, D., Pieters, J., & Nuyttens, D. (2012). An integrated study to improve spray deposition in a dense crop with a horizontal leaf position. Aspects of Applied Biology (Vol. 114, pp. 355–362). Presented at the International Advances in Pesticide Application 2012, Warwick, UK: Association of Applied Biologists.
Vancouver
1.
Foqué D, Pieters J, Nuyttens D. An integrated study to improve spray deposition in a dense crop with a horizontal leaf position. Aspects of Applied Biology. Warwick, UK: Association of Applied Biologists; 2012. p. 355–62.
MLA
Foqué, Dieter, Jan Pieters, and David Nuyttens. “An Integrated Study to Improve Spray Deposition in a Dense Crop with a Horizontal Leaf Position.” Aspects of Applied Biology. Vol. 114. Warwick, UK: Association of Applied Biologists, 2012. 355–362. Print.
@inproceedings{4212648,
  abstract     = {Flemish greenhouse growers predominantly use handheld spray guns and spray lances for their crop protection purposes, despite the heavy workload and high risk for operator exposure associated with these techniques. These spray application techniques have shown to be less effective than spray boom equipment under many conditions. Handheld spraying techniques are less expensive, however, and they are more flexible in use. Many Flemish growers also erroneously believe that high spray volumes and pressures are needed to assure good plant protection.
This paper summarises the results of a whole series of laboratory trials to optimize the depositions of a horizontal spray boom system in a dense ivy crop with a horizontal leaf position. The effect of nozzle type, spray volume, spray direction, air support and the number of passes was evaluated. In total, seventeen spray application techniques were evaluated.
Overall, the use of air support resulted in the most uniform spray distribution because of an improved spray penetration and a good coverage of the lower sides of the leaves. The use of air support was most effective when combined with a medium droplet size extended range flat-fan nozzle at 3.0 bar with a 30{\textdegree} forward or a standard 0{\textdegree} spray angle and a spray volume of 1000 L ha-1. Without air support, a 30{\textdegree} forward angle lead to higher depositions within the canopy as well.},
  author       = {Foqu{\'e}, Dieter and Pieters, Jan and Nuyttens, David},
  booktitle    = {Aspects of Applied Biology},
  issn         = {0265-1491},
  keyword      = {nozzle type,ivy pot plants,spray boom settings,spray angle,air support,horizontal spray boom system,spray volume},
  language     = {eng},
  location     = {Wageningen, The Netherlands},
  pages        = {355--362},
  publisher    = {Association of Applied Biologists},
  title        = {An integrated study to improve spray deposition in a dense crop with a horizontal leaf position},
  volume       = {114},
  year         = {2012},
}