Effects of nozzle type and spray angle on spray deposition in ivy pot plants

Foqué, Dieter; Nuyttens, David

doi:10.1002/ps.2051

Cited by 49 publications

(54 citation statements)

References 63 publications

(72 reference statements)

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“…Because the mechanisms of droplets leaving a hydraulic spray nozzle are very complex and difficult to quantify or model, there is a need for accurate experimental quantification techniques. Few studies are available on selection of nozzles to provide adequate spray deposition and coverage of the plant protection products [1,2,3]. …”

Section: Introductionmentioning

confidence: 99%

Spray Droplet Characterization from a Single Nozzle by High Speed Image Analysis Using an In-Focus Droplet Criterion

Minov

Cointault

Vangeyte³

et al. 2016

Sensors

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Accurate spray characterization helps to better understand the pesticide spray application process. The goal of this research was to present the proof of principle of a droplet size and velocity measuring technique for different types of hydraulic spray nozzles using a high speed backlight image acquisition and analysis system. As only part of the drops of an agricultural spray can be in focus at any given moment, an in-focus criterion based on the gray level gradient was proposed to decide whether a given droplet is in focus or not. In a first experiment, differently sized droplets were generated with a piezoelectric generator and studied to establish the relationship between size and in-focus characteristics. In a second experiment, it was demonstrated that droplet sizes and velocities from a real sprayer could be measured reliably in a non-intrusive way using the newly developed image acquisition set-up and image processing. Measured droplet sizes ranged from 24 μm to 543 μm, depending on the nozzle type and size. Droplet velocities ranged from around 0.5 m/s to 12 m/s. The droplet size and velocity results were compared and related well with the results obtained with a Phase Doppler Particle Analyzer (PDPA).

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Section: Introductionmentioning

confidence: 99%

Spray Droplet Characterization from a Single Nozzle by High Speed Image Analysis Using an In-Focus Droplet Criterion

Minov

Cointault

Vangeyte³

et al. 2016

Sensors

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“…They were scanned afterwards at a resolution of 600 dpi. The percentages of initially wetted, and thus blue surface on the water sensitive papers, were measured using image analysis software written in Halcon 8.0 (MVTec Software GmbH, Munich, Germany) . The wetted surface was measured separately for the parts covering the upperside and the underside of a leaf.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…young larvae live predominantly on the underside of the cabbage leaves, whereas older and larger caterpillars enter inside the crown of the plant and hide between the leaves . This makes them hard‐to‐reach targets for spray applications . Brusselman et al .…”

Section: Introductionmentioning

confidence: 99%

Improving the biocontrol potential of entomopathogenic nematodes against Mamestra brassicae : effect of spray application technique, adjuvants and an attractant

Beck¹,

Brusselman²,

Nuyttens³

et al. 2013

Pest. Manag. Sci.

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“…However, most fluorescent dyes are photosensitive and fade under solar irradiation . Moreover, some fluorescent tracers are not water soluble and require the addition of surfactants, which reduce the surface tension of the spray solution and influence the spray deposition . To address the problems associated with dye degradation under sunlight, metal ions or metal chelates are widely used as tracers for spray deposition assessment using atomic absorption spectroscopy or inductively coupled plasma analysis .…”

Section: Introductionmentioning

confidence: 99%

Water‐soluble food dye of Allura Red as a tracer to determine the spray deposition of pesticide on target crops

Gao

Wang

Zhou

et al. 2019

Pest Management Science

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BACKGROUND Quantification of spray deposition on a target crop is of vital importance to optimize pesticide application. In traditional determinations of spray deposition, a large amount of organic solvent is used to extract pesticides from the target crops. In this study, a water‐soluble food dye of Allura Red was developed as a tracer to determine pesticide spray deposition on a rice target crop. RESULTS The addition of Allura Red does not obviously alter the physicochemical properties of pesticides (viscosity, density and surface tension) and droplet spectra. An ultra‐performance liquid chromatography (UPLC) analytical method was developed and validated to determine the deposition amount of Allura Red on rice plants. Method accuracy and precision for Allura Red were found to be satisfactory with recoveries of 96.07% to 107.48%. To validate the method, comparative deposition analyses were carried out using representative systematic and non‐systematic pesticides (nitenpyram and chlorothalonil) under the same spraying scenarios using a Potter spray tower. Allura Red and pesticides showed comparable deposition under the same application conditions with ratios from 0.98 to 1.21. A field trial using an unmanned aerial vehicle sprayer further indicated that the deposition rates for Allura Red and nitenpyram on rice seedling were 13.04% and 11.07%, with corresponding relative standard deviation values (n = 5) of 16.39% and 18.79%. CONCLUSION A laboratory test and field trial confirmed that the developed method of using Allura Red as a tracer for spray deposition assessment is feasible and practicable. © 2019 Society of Chemical Industry

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Effects of nozzle type and spray angle on spray deposition in ivy pot plants

Cited by 49 publications

References 63 publications

Spray Droplet Characterization from a Single Nozzle by High Speed Image Analysis Using an In-Focus Droplet Criterion

Spray Droplet Characterization from a Single Nozzle by High Speed Image Analysis Using an In-Focus Droplet Criterion

Improving the biocontrol potential of entomopathogenic nematodes against Mamestra brassicae : effect of spray application technique, adjuvants and an attractant

Water‐soluble food dye of Allura Red as a tracer to determine the spray deposition of pesticide on target crops

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