A Method to Determine Spray Drift Potential from Nozzles and its Link to Buffer Zone Restrictions

Herbst, Andreas

doi:10.13031/2013.7333

Cited by 5 publications

(2 citation statements)

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“…This is because during the field trials, the uncontrollability of environmental temperature, humidity, wind speed and other factors leads to poor test repeatability [24]. Spray parameters and environmental parameters can be accurately controlled in the in-door spray test, making the test repeatable [25,26].…”

Section: Introductionmentioning

confidence: 99%

Influence of Poly (Ethylene Glycol) 20,000 Concentration on Atomization and Deposition Characteristics of Nozzle

et al. 2021

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The addition of surfactants to pesticide spray applications is an important method to improve the spray atomization and the coverage of droplets on the target. The effects of different types of surfactants on spraying have been extensively studied, but there have been few studies on the commonly used surfactant polyethylene glycol so far. This article compares the effect of polyethylene glycol 20,000 on the atomization and deposition characteristics by measuring the droplet size and the deposition on the polyethylene collection line when spraying different concentrations of polyethylene glycol 20,000 solution. The results show that the volume medium diameter DV0.5 of spraying different concentrations of polyethylene glycol 20,000 solution is larger than that of clear water, and that as the concentration increases, the volume medium diameter DV0.5 gradually increases but ΦVol < 150 μm decreases. Spraying different concentrations of polyethylene glycol 20,000 solution at a horizontal distance of 2–7 m from the nozzle and at a distance of 0.1–0.2 m from the bottom of the floor, the depositions are all less than that of clear water, and as the concentration increases, the deposition becomes smaller. This article can provide theoretical support for the use and concentration ratio of polyethylene glycol 20,000 in field application.

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Section: Introductionmentioning

confidence: 99%

Influence of Poly (Ethylene Glycol) 20,000 Concentration on Atomization and Deposition Characteristics of Nozzle

et al. 2021

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“…The repeatability of field experiments was bad due to the unstable wind speed and direction [16] . However, wind tunnel experiments can control the spraying parameters and application environment, and gain ideal repeatability [17,18] .…”

Section: Introductionmentioning

confidence: 99%

Influencing factors research and performance experiment on droplets deposition at low wind speed

Ding

Xue

Qin

et al. 2019

International Journal of Precision Agricultural Aviation

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In view of the droplet drift during aerial spraying, a droplet deposition distribution measurement system was designed to determine the droplet size under different spray pressures using LURMARK-04F80 nozzle. Wind tunnel was used to simulate the natural wind by generating fixed-speed wind. According to the international standard (ISO/FDIS 22856:2008), nozzle was installed at 0.6 m above the wind tunnel bottom. Deposition drift was assessed by adding fluorescent tracer to the spray mixture and measuring the quantities of droplet deposition on the PE Twines which were installed perpendicular to the wind direction in a vertical and a horizontal array. At 2 m distant from the static nozzle at downwind direction and 0.1 m above the wind tunnel bottom, five PE Twines are positioned vertically one above the other at interval of 0.1 m and seven PE Twines are positioned horizontally one above the other at interval of 1 m. By analyzing the drift index at different positions, the influences of spray angle, nozzle angle, side wind and spray pressure on the droplet drift were studied. Experimental results show that drift index on the line decreases as vertical and/or horizontal distance increase. Spray pressure and wind speed have great influence on the drift parameter. Droplets drift still exists at 7 m distant from the nozzle when spray pressure attains 0.4 MPa. Wind speed attains 3 m/s and spray angle is 0° or wind speed attains 5 m/s. Spray pressure attains 0.3 MPa and spray angle is 0°. The drift index in the vertical and the horizontal direction when the spray angle is 0° is higher than that of the other spray angles. When spray distance attains 4 m and nozzle angle attains 0°, the drift index is higher than that of the other nozzle angles. To reduce the droplet drift when the wind speed attains 5 m/s, spray operation creating droplet size should be adopted and the spray angle should be adjusted. This study provides optimized operation parameter for aerial nozzle and plays a vital role in reducing droplet drift.

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Influence of the urease inhibitor suspension (Atmowell^®) on the fluorescent dye pyranine and its spray and drift behavior in wind tunnel measurements

Ehmke

Melfsen

Wegener

et al. 2023

Journal of Environmental Science and Health, Part B

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A Method to Determine Spray Drift Potential from Nozzles and its Link to Buffer Zone Restrictions

Cited by 5 publications

References 0 publications

Influence of Poly (Ethylene Glycol) 20,000 Concentration on Atomization and Deposition Characteristics of Nozzle

Influence of Poly (Ethylene Glycol) 20,000 Concentration on Atomization and Deposition Characteristics of Nozzle

Influencing factors research and performance experiment on droplets deposition at low wind speed

Influence of the urease inhibitor suspension (Atmowell^®) on the fluorescent dye pyranine and its spray and drift behavior in wind tunnel measurements

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A Method to Determine Spray Drift Potential from Nozzles and its Link to Buffer Zone Restrictions

Cited by 5 publications

References 0 publications

Influence of Poly (Ethylene Glycol) 20,000 Concentration on Atomization and Deposition Characteristics of Nozzle

Influence of Poly (Ethylene Glycol) 20,000 Concentration on Atomization and Deposition Characteristics of Nozzle

Influencing factors research and performance experiment on droplets deposition at low wind speed

Influence of the urease inhibitor suspension (Atmowell®) on the fluorescent dye pyranine and its spray and drift behavior in wind tunnel measurements

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Product

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About

Influence of the urease inhibitor suspension (Atmowell^®) on the fluorescent dye pyranine and its spray and drift behavior in wind tunnel measurements