Assessment of spray drift potential reduction for hollow-cone nozzles: Part 1. Classification using indirect methods

Pesticide spray drift poses health hazards to humans and causes a significant impact on the environment. In this work the capacity of an ad hoc light detection and ranging (LiDAR) system to differentiate spray nozzles according to their potential drift risk is evaluated for the first time.A total of 23 drift potential tests using 10 hollow-cone nozzles were carried out with the sprayer kept in a static position. Drift potential reduction (DPR) values of between 88.6% and 93.6% were obtained when comparing standard and drift reduction nozzle types. It was also possible to order different standard nozzle sizes according to their DPR. The LiDAR signal was correlated with several droplet size parameters measured by a phase Doppler particle analyzer (PDPA), being V 100 the best indicator. In the four field tests that were performed, the LiDAR system was also able to differentiate between standard and drift reduction nozzles under real application conditions, obtaining a DPR of 56.7%. The results of this work demonstrate that the developed LiDAR system is an advantageous alternative for the assessment of drift potential reduction.

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“…The LiDAR results were also compared with those obtained in wind tunnel tests carried out by Torrent et al (2019). Fig.…”

Section: Comparison Between Lidar and Indirect Methodsmentioning

confidence: 99%

Assessment of spray drift potential reduction for hollow-cone nozzles: Part 2. LiDAR technique

Gregorio

Torrent

Planas

et al. 2019

Science of The Total Environment

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“…Researchers have adopted different techniques using the influencing factors to study how to reduce spray drift 24–28 . For many years, efforts to reduce spray drift focused on producing larger droplets 15 .…”

Section: Introductionmentioning

confidence: 99%

“…23 Researchers have adopted different techniques using the influencing factors to study how to reduce spray drift. [24][25][26][27][28] For many years, efforts to reduce spray drift focused on producing larger droplets. 15 Nozzle type 13 and nozzle size 29 have the greatest influence on droplet size and velocity.…”

Section: Introductionmentioning

confidence: 99%

Reducing pesticide spraying drift by folate/Zn²⁺ supramolecular hydrogels

Song

Zhu

Cao

et al. 2021

Pest Management Science

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BACKGROUND The purpose of this study was to use folic acid and zinc nitrate to construct a biocompatible supramolecular hydrogel loaded with the herbicide dicamba as an ultra‐low‐volume spray formulation. The drift potential of the hydrogel was studied by simulating the field environment in a wind tunnel. RESULTS The three‐dimensional network structure of the successfully prepared dicamba hydrogel system was observed using cryo‐scanning electron microscopy. A rheological study of the dicamba hydrogel showed that it has shear‐thinning and self‐healing properties. Using a laser particle size analyzer, it was shown that the droplet size of the dicamba gel (approximately 100 μm) was significantly larger than that of the control group water and dicamba–KOH droplets. Droplet collectors and water‐sensitive papers were arranged in the wind tunnel to evaluate the drift‐reduction performance of the dicamba gel. Compared with dicamba–KOH aqueous solution, dicamba gel has a good effect in reducing drift. CONCLUSION This hydrogel containing no organic solvents showed biocompatibility and biodegradability due to its natural and readily available raw materials. The main way in which hydrogels reduce drift is by increasing the droplet size and this is due to the three‐dimensional network structure inside the gel. This research provides a new strategy to reduce spray drift from the perspective of pesticide formulation, and also has prospects for the application of supramolecular hydrogels in agriculture.

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“…The suggested threshold nozzles for these drift reduction classes in orchard spraying are, respectively: TeeJet DG8002 (drift reduction of 62%), Albuz AVI 80015 (drift reduction of 74%), and Albuz TVI 80025 (drift reduction of 97%), all at 7-bar spray pressure, as well as Lechler ID 9001 (drift reduction of 91%) at 5-bar pressure. Another study revealed that the V100 achieved a high correlation (up to R 2 = 0.948) with the drift potential tested with the wind tunnel for hollow-cone nozzles [ 148 ].…”

Section: Other Factors Affecting Performance In Sprayingmentioning

confidence: 99%

Opportunities and Possibilities of Developing an Advanced Precision Spraying System for Tree Fruits

Mahmud

Zahid

et al. 2021

Sensors

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Reducing risk from pesticide applications has been gaining serious attention in the last few decades due to the significant damage to human health, environment, and ecosystems. Pesticide applications are an essential part of current agriculture, enhancing cultivated crop productivity and quality and preventing losses of up to 45% of the world food supply. However, inappropriate and excessive use of pesticides is a major rising concern. Precision spraying addresses these concerns by precisely and efficiently applying pesticides to the target area and substantially reducing pesticide usage while maintaining efficacy at preventing crop losses. This review provides a systematic summary of current technologies used for precision spraying in tree fruits and highlights their potential, briefly discusses factors affecting spraying parameters, and concludes with possible solutions to reduce excessive agrochemical uses. We conclude there is a critical need for appropriate sensing techniques that can accurately detect the target. In addition, air jet velocity, travel speed, wind speed and direction, droplet size, and canopy characteristics need to be considered for successful droplet deposition by the spraying system. Assessment of terrain is important when field elevation has significant variability. Control of airflow during spraying is another important parameter that needs to be considered. Incorporation of these variables in precision spraying systems will optimize spray decisions and help reduce excessive agrochemical applications.

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Assessment of spray drift potential reduction for hollow-cone nozzles: Part 1. Classification using indirect methods

Abstract: Està subjecte a una llicència de Reconeixement-NoComercial-SenseObraDerivada 3.0 de Creative Commons

Cited by 25 publications

References 28 publications

Assessment of spray drift potential reduction for hollow-cone nozzles: Part 2. LiDAR technique

Assessment of spray drift potential reduction for hollow-cone nozzles: Part 2. LiDAR technique

Reducing pesticide spraying drift by folate/Zn²⁺ supramolecular hydrogels

Opportunities and Possibilities of Developing an Advanced Precision Spraying System for Tree Fruits

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Assessment of spray drift potential reduction for hollow-cone nozzles: Part 1. Classification using indirect methods

Abstract: Està subjecte a una llicència de Reconeixement-NoComercial-SenseObraDerivada 3.0 de Creative Commons

Cited by 25 publications

References 28 publications

Assessment of spray drift potential reduction for hollow-cone nozzles: Part 2. LiDAR technique

Assessment of spray drift potential reduction for hollow-cone nozzles: Part 2. LiDAR technique

Reducing pesticide spraying drift by folate/Zn2+ supramolecular hydrogels

Opportunities and Possibilities of Developing an Advanced Precision Spraying System for Tree Fruits

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Product

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Reducing pesticide spraying drift by folate/Zn²⁺ supramolecular hydrogels