Nozzle Selection for Optimizing Deposition and Minimizing Spray Drift for the AT-502 Air Tractor

Bouse, L. F.; Carlton, J. B.; Kirk, I. W.; Hirsch, T J; ., Jr.

doi:10.13031/2013.28259

Cited by 5 publications

(5 citation statements)

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“…The biological efficacy of a phytosanitary treatment can be better evaluated if an analysis of the droplet population is performed following application. One of the tools employed for this assessment is the use of artificial targets, such as water-sensitive cards (Bouse et al, 1994). When properly handled, these cards are valuable tools for determining the quality of sprays, particularly in aerial rotating atomizer applications, which do not allow for easy laboratory assessments of the drop spectrum, employing laser droplet analysis equipment, for example.…”

Section: Introductionmentioning

confidence: 99%

Droplet Spectrum Produced in Pumpkin Cultures Submitted to Different Forms of Spraying

Vitória¹,

Crause²,

Freitas³

et al. 2019

JAS

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The uniformity and droplet size produced during the spraying as well the correct deposition of these in the target, contribute directly to the success of a pesticide application. The objective of the present study was to characterize the ejected spray in the aerial and terrestrial spraying of pumpkin crops, with the use of adjuvants in a liquid solution. The experiment was carried out in two commercial plantations, in an entirely randomized design, employing a 6 × 2 factorial scheme, with six forms of application and two liquid compositions. The droplet spectrum was assessed employing water-sensitive card imaging. Smaller drop sizes and relative amplitudes were produced by aerial applications. In turn, the largest droplet diameters and the lowest percentage of drops smaller than 100 μm were obtained when using air induction twin flat spray nozzles. The adjuvant did not interfere in the numerical and volumetric median diameters, the relative amplitude, or the volume rate of droplets smaller than 100 μm.

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Section: Introductionmentioning

confidence: 99%

Droplet Spectrum Produced in Pumpkin Cultures Submitted to Different Forms of Spraying

Vitória¹,

Crause²,

Freitas³

et al. 2019

JAS

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“…In sparsely populated regions of the US, manned fixed‐wing aircraft have been commonly utilized. Conversely, in countries such as Japan and Korea, where arable land is limited and the terrain is often mountainous, smaller Unmanned Aerial Spraying System (UASS), also known as Unmanned Aerial Vehicle (UAV) sprayers, have become prevalent in agricultural aviation 11,12 . The use of UASS for plant protection in China has garnered considerable attention and experienced swift development since 2015 13 .…”

Section: Introductionmentioning

confidence: 99%

“…Conversely, in countries such as Japan and Korea, where arable land is limited and the terrain is often mountainous, smaller Unmanned Aerial Spraying System (UASS), also known as Unmanned Aerial Vehicle (UAV) sprayers, have become prevalent in agricultural aviation. 11,12 The use of UASS for plant protection in China has garnered considerable attention and experienced swift development since 2015. 13 Researchers such as Xin et al and Xu et al have respectively explored the UASS's capabilities in small-batch spraying technology and field fertilization applications.…”

Section: Introductionmentioning

confidence: 99%

Field evaluation of a six‐rotor unmanned agricultural aerial sprayer: effects of application parameters on spray deposition and control efficacy against rice planthopper

Huang

Wang

Wongsuk

et al. 2023

Pest Management Science

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BACKGROUNDUnmanned Aerial Spraying System (UASS) has emerged as an advanced, precise, and efficient tool for pesticide application in numerous nations in recent years. Despite this, there is a noticeable gap in research advocating viable, quantifiable methodologies for application parameter optimization. This investigation was primarily oriented toward identifying optimal UASS application parameters. It did so by exploring the effects of varying spray volumes and flight parameters on spray performance in a comprehensive manner, and by assessing the biological potency of aerial insecticide application against Rice Planthopper (RPH) using the optimal parameters, aided by two types of nozzles in rice field settings.RESULTSIncreased spray volume increased the spray deposition. Working height impacted the distribution of spray deposition, with a higher working height leading to superior distribution uniformity. Both spray volume and working height were observed to influence spray deposition and its percentage in tandem. Upon factor analysis, the optimal parameters determined for rice at the heading stage were an application volume of 15.0 L·ha−1, a working height of 2.0 m, and a driving speed of 5.0 m·s−1. Under these parameters, the air‐induction twin flat fan nozzle IDKT120‐015 demonstrated approximately 5% higher spray deposition than the flat fan nozzle SX11001VS, albeit with inferior distribution uniformity. Both nozzle types achieved over 93.0% control efficacy against RPH using triflumezopyrim, persisting for up to 40 days post‐treatment.CONCLUSIONThis study furnishes invaluable insights and data for controlling rice planthopper via UASS pesticide application, contributing to the progress of modern intensive and sustainable agriculture. © 2023 Society of Chemical Industry.

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“…19,20 Extensive research on spray drift has clarified that spray drift is influenced by operational parameters and the external environment. 21,22 The basic physical factors affecting droplet drift are droplet size, droplet velocity, and the physicochemical properties of the spray solution.…”

Section: Introductionmentioning

confidence: 99%

“…An improved three‐dimensional test method has been proposed to investigate droplet drift distribution characteristics for low‐volume and low‐height UASS applications 19,20 . Extensive research on spray drift has clarified that spray drift is influenced by operational parameters and the external environment 21,22 . The basic physical factors affecting droplet drift are droplet size, droplet velocity, and the physicochemical properties of the spray solution.…”

Section: Introductionmentioning

confidence: 99%

Field evaluation of spray drift and nontargeted soybean injury from unmanned aerial spraying system herbicide application under acceptable operation conditions

Huang

Wang

et al. 2022

Pest Management Science

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Background: Droplets of plant production products sprayed from unmanned aerial spraying system (UASS) applications are prone to drift, threatening nontarget crops, humans, and environment. There are few studies that have investigated plant bioassay of UASS spray drift, and even fewer when it comes to herbicide application. This work reports a combined field-scale evaluation of spray drift and plant bioassay for a rice herbicide florpyrauxifen-benzyl application using a six-rotor motor UASS under acceptable operating conditions. An artificial rice canopy was built to simulate a practical field application scenario and the soybean was applied to assess the nontargeted crop injury. The effects of nozzle type (droplet size), flight height, and adjuvant on spray deposition, sedimenting drift, airborne drift, and soybean injury were studied to explore the feasibility of UASS herbicide application.Results: Under an average wind speed of 1.2-1.5 m s −1 , reduced flight height, increased droplet size, and adding nonionic surfactant resulted in greater deposition, lower drift, and less injury to soybean. Increasing droplet size by changing the nozzle was more effective compared with adding adjuvant and reducing the flight height, which offers greater flexibility and can accomplish better spray performance. The correlations between sedimenting drift and soybean injury percentage were highly significant (P < 0.01, r > 0.96). The calculated buffer distances of 7.7-18.9 m were to varying degrees less than the soybean safety distances of 10.0-20.0 m. Conclusion:The results of this study provide a reference basis for determining optimum working parameters and establishing buffer zones for the rice herbicide application of UASS.

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Nozzle Selection for Optimizing Deposition and Minimizing Spray Drift for the AT-502 Air Tractor

Cited by 5 publications

References 0 publications

Droplet Spectrum Produced in Pumpkin Cultures Submitted to Different Forms of Spraying

Droplet Spectrum Produced in Pumpkin Cultures Submitted to Different Forms of Spraying

Field evaluation of a six‐rotor unmanned agricultural aerial sprayer: effects of application parameters on spray deposition and control efficacy against rice planthopper

Field evaluation of spray drift and nontargeted soybean injury from unmanned aerial spraying system herbicide application under acceptable operation conditions

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