Environmentally friendly spray techniques for tree crops

Doruchowski, G.; Holownicki, R.

doi:10.1016/s0261-2194(00)00081-8

Cited by 36 publications

(14 citation statements)

References 6 publications

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“…The advances made in application technology over the last ten years have allowed the doses used to be reduced (Doruchowski and Holownicki, 2000). In fact, spraying can now be considered a high precision technique.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the pesticide coverage achieved in a trellised vineyard by a prototype tunnel sprayer, a hydraulic sprayer, an air-assisted sprayer and a pneumatic sprayer

Soriano¹,

Soriano²,

Piedra³

et al. 2005

Span. j. agric. res.

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Spraying is the main method used to apply pesticides to trellised vines in Castilla-La Mancha, Spain. If the efficiency of spray applications is to be improved, the amount of pesticide employed is to be reduced, and the performance of existing and new spray technology enhanced, the leaf coverage achieved must be known and a system developed that can rapidly determine it. With these aims in mind, the authors built and tested a prototype tunnel sprayer and compared its efficiency to the three types of sprayer most commonly used in the region: the hydraulic sprayer, the air-assisted sprayer and the pneumatic sprayer. To determine and compare the coverage produced by these four machines, a rapid analysis system that combines the use of water-sensitive paper strips and an artificial vision system was developed. All four machines were used to spray a commercial fungicide (dose 200 L ha -1 ) at working pressures of 0.1, 0.3 and 0.6 MPa onto vines in a trellised vineyard. With all four models, the quality of the application improved with the spraying pressure, although the best spraying coverage was obtained with tunnel sprayer. Even though the results obtained were not optimum (the formation of a uniform film of fungicide on the leaf surface), the mean coverage achieved by the tunnel sprayer (as recorded by the water-sensitive papers attached to the leaves) was 54%, and on occasion over 79%.Additional key words: drift, fungicide, trellised vines, water-sensitive paper. ResumenComparación del recubrimiento con productos fitosanitarios alcanzado en viña en espaldera por un prototipo de pulverizador tipo túnel, un pulverizador, un atomizador y un nebulizador La pulverización es el principal método usado en Castilla-La Mancha para aplicar productos fitosanitarios a la viña en espaldera. Si la eficiencia de las aplicaciones se incrementa, la cantidad de pesticida empleado se reduce y el rendimiento de las máquinas existentes y de las nuevas tecnologías aumenta. Para ello, debe conocerse el recubrimiento alcanzado en las hojas y desarrollarse un sistema que pueda determinarlo rápidamente. Con estos objetivos se construyó y ensayó un prototipo de pulverizador tipo túnel, y se comparó su eficiencia con los tres tipos de máquinas de aplicación de productos fitosanitarios más utilizados en esta región: pulverizadores, atomizadores y nebulizadores. Para determinar el porcentaje de recubrimiento logrado por las máquinas, se desarrolló un sistema rápido que combina el uso de cartulinas de papel hidrosensible con la visión artificial. Con todos los pulverizadores se usó el mismo fungicida comercial (200 L ha -1 ) y se ensayaron, a tres presiones diferentes (0,1 MPa, 0,3 MPa y 0,6 MPa), en un viñedo en espaldera. Se demostró que en los cuatro modelos la calidad de la aplicación mejora con la presión de la pulverización, y que el mejor recubrimiento se obtuvo con el prototipo de pulverizador tipo túnel. Aunque los resultados obtenidos no fueron óptimos (formación de una película uniforme de fungicida), el valor medio alcanzado...

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Section: Introductionmentioning

confidence: 99%

Comparison of the pesticide coverage achieved in a trellised vineyard by a prototype tunnel sprayer, a hydraulic sprayer, an air-assisted sprayer and a pneumatic sprayer

Soriano¹,

Soriano²,

Piedra³

et al. 2005

Span. j. agric. res.

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“…In field applications, the global matching on the shape is important especially when using this information for graduating/choking locally the action of an implement on the canopy, e.g. for graduating the nozzle valves opening of a sprayer (Doruchowski and Holownicki, 2000;Escolà et al, 2013;Llorens et al, 2010;Osterman et al, 2013;Solanelles-Batlle et al, 2006).…”

Section: D-profiles Reconstruction and Volumes Of Optical Targetsmentioning

confidence: 99%

“…distances are used to give indications on the volume application rate through the canopy volume or to position the spraying arms in a variable-geometry air-assisted orchard sprayer (Osterman et al, 2013). Pursuing the maximization of the foliar deposit of pesticides regardless of the plant size and canopy density, to limit the problems due to environmental contamination, leads necessary to an increase in the effectiveness and efficiency of the treatments (Doruchowski and Holownicki, 2000;Koch, 2007), in accordance with the latest EU Directives.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a LiDAR-based 3D-stereoscopic vision system for crop-monitoring applications

Bietresato

Carabin

Vidoni

et al. 2016

Computers and Electronics in Agriculture

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“…Because of their ability to recover and recycle most of the spray fraction that has not been retained by the canopy, these sprayers may make efficient pest control possible even at reduced pesticide dose rates (by 15% to 50%) [Siegfried 1996;Doruchowski 2000].…”

Section: Introductionmentioning

confidence: 99%

A Novel, Air-Assisted Tunnel Sprayer for Vineyards: Optimization of Operational Parameters and First Assessment in the Field

Pergher¹,

Petris²

2009

J Agricult Engineer

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Tunnel (recycling) sprayers have long been recognised as an important tool to reduce drift losses. Depending on the crop and the growth stage, tunnel sprayers may recycle up to 60% of the spray volume, thus enabling the farmers to control pests even at reduced PPP dose rates. However, the introduction of tunnel sprayers in Italian vine-growing farms has been hindered so far by high machine cost, low working speed, and often unsatisfactory uniformity of deposition, generally related to the difficulty of correctly managing the air currents inside the tunnel. Recently, a new prototype, air-assisted shielded sprayer has been developed by the University of Udine and Agricolmeccanica s.r.l. The two-row, tractor-mounted sprayer uses a lamellae separator wall, placed in front of each nozzle boom, to recover the excess spray which has not deposited on the canopy. Initial tests have been conducted to analyse the effects of the main sprayer settings (air flow rate, distance between the shields, and orientation of the air outlets) on spray recovery. Maximum recovery rate was 95.1% under static conditions. The sprayer was then used for spray application in the vineyard during the 2007 season, showing high reliability and work capacity. The recovery rate was 34% to 77% under field conditions, depending on the leaf area of the crop and other factors.

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Environmentally friendly spray techniques for tree crops

Cited by 36 publications

References 6 publications

Comparison of the pesticide coverage achieved in a trellised vineyard by a prototype tunnel sprayer, a hydraulic sprayer, an air-assisted sprayer and a pneumatic sprayer

Comparison of the pesticide coverage achieved in a trellised vineyard by a prototype tunnel sprayer, a hydraulic sprayer, an air-assisted sprayer and a pneumatic sprayer

Evaluation of a LiDAR-based 3D-stereoscopic vision system for crop-monitoring applications

A Novel, Air-Assisted Tunnel Sprayer for Vineyards: Optimization of Operational Parameters and First Assessment in the Field

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