Anti-Drift Technology Progress of Plant Protection Applied to Orchards: A Review

Li, Shaobo; Li, Jianping; Yu, Shaomeng; Wang, Pengfei; Liu, Hongjie; Yang, Xin

doi:10.3390/agronomy13112679

Cited by 5 publications

(2 citation statements)

References 79 publications

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“…The method involves applying additional forces, such as gravity, airflow and electrostatic forces. [35][36][37][38] The conventional spraying mode has limited ability to direct droplets and cannot expand the droplet transport channel, which makes it unsuitable for pest and disease control in soybean crops with a dense canopy in the mid-to-late growth period. Therefore, some researchers choose to add an electrostatically assisted approach.…”

Section: Discussionmentioning

confidence: 99%

Spray performance of flexible shield canopy opener and rotor wind integrated boom‐sprayer application in soybean: effects on droplet deposition distribution

Yu,

Cui,

Cui

et al. 2024

Pest Management Science

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BACKGROUNDCanopy density is high during mid to late soybean growth due to dense planting to improve yield, which seriously affects the control of pests and diseases. The dilemmas of difficult droplet penetration, non‐uniform deposition, and droplet drift in field spraying remain challenges to precise control of droplet distribution. This paper proposed a novel spraying application mode combined Flexible Shield Canopy Opener (FSCO) with rotary wind. The design of the key components of the new boom spraying machine are described. The effects of the comparative spraying modes on spray deposition and droplet drift in field validation test were studied to explore the feasibility of the novel spraying application.RESULTSThe study found that droplet coverage inside the soybean canopy was significantly affected by spraying mode, rotor wind speed, and opener depth. The spraying operation that used the FSCO and rotor wind integrated mode was optimal for droplet uniformity on the adaxial and abaxial surfaces of the canopy leaves, with droplet uniformity indices of 0.966 and 0.934, respectively. At rotor wind speed of 6 m/s and opener depth of 15 cm, the soybean canopy droplet coverage uniformity effect achieved the highest composite score of 0.937. The spraying mode used in this study improved droplet coverage uniformity by 82.30% and droplet anti‐drift performance improved by 99.73% compared to the conventional boom spraying mode.CONCLUSIONThe study shows validity of the spraying mode combined FSCO with rotary wind to open dense canopy and improved droplet deposition uniformity in canopy and anti‐drift performance.This article is protected by copyright. All rights reserved.

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Section: Discussionmentioning

confidence: 99%

Spray performance of flexible shield canopy opener and rotor wind integrated boom‐sprayer application in soybean: effects on droplet deposition distribution

Yu,

Cui,

Cui

et al. 2024

Pest Management Science

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show abstract

“…A new method for testing dispersion devices used for pesticide application in crops or orchards and not only has been discovered and was highly debated by other researchers with the same thoughts and aims to make an efficiency in pesticide management. Early researches in pesticide drift monitoring were also made using image analysis technique and LIDAR sensors (Gheres, et al, 2023;Li, et al, 2023;Kashdan, et al, 2007;Gregorio, et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

The Influence of Working Speed on the Quality Parameters for Spraying in Vineyards

RITTNER,

GHEȚE,

MARIAN

et al. 2024

INMATEH

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In vine cultivation, pests are obstacles to obtaining crops that correspond both qualitatively and quantitatively. In this work, main working qualitative indices were determined. These working qualitative indices were determined under real field conditions using 2 types of nozzles, an air injection nozzle and a standard nozzle. The working qualitative indices determined were DV1, DV5, DV9, coverage degree, number of drops and the amount of solution deposited on target surface. For both speeds of 5 and 7 km/h, DV5 values classified the spray extra and ultra coarse spectrum. The coverage rate was between 55% and 99% regardless of travel speed.

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Multifactorial analysis and experiments affecting the effect of fog droplet penetration in fruit tree canopies

Sun,

Huang,

et al. 2024

Front. Plant Sci.

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This study examines the impact of canopy density, side wind speed, nozzle tilt angle, and droplet size on droplet penetration during plant protection spraying operations. Experiments conducted in citrus orchards evaluated how side wind speed and nozzle tilt angle influence droplet penetration across various canopy densities. A Phase Doppler Analyzer (PDA) was used to assess droplet size variations under different nozzle tilt angles and side wind speeds, yielding a multiple linear regression equation (R2 = 0.866) that links nozzle tilt angle and side wind speed with droplet size. Results showed that droplet size decreases with increasing nozzle tilt angle at a constant crosswind speed. Further experiments investigated the effects of droplet size and canopy leaf area density on droplet penetration, involving three canopy leaf area densities, four wind speeds, and six nozzle tilt angles. Droplet deposition and canopy coverage were measured under various spraying parameters, with conventional operations (0° nozzle tilt and orthogonal wind speeds) serving as controls. The study found that adjusting nozzle tilt angle and wind speed enhances droplet penetration in different canopy structures. Optimal parameters varied with leaf area density (LAD): an 18° tilt angle and 3 m/s wind speed for a LAD of 5.94 m3/m3, a 45° tilt angle and 2 m/s wind speed for a LAD of 8.47 m2/m3, and a 36° tilt angle and 3 m/s wind speed for a LAD of 11.12 m2/m3. At 1 m/s, droplet deposition followed a downward parabolic trend with changes in nozzle tilt angle, whereas at 2 m/s, deposition followed an upward parabolic trend. At a side wind speed of 3 m/s, droplet deposition remained unchanged with nozzle tilt angle but decreased with increasing canopy density. Nonlinear regression analysis indicated that leaf area density had a greater impact on deposition differences than droplet size, with droplet penetration decreasing as leaf area density increased. This study provides a reference for enhancing fog droplet penetration techniques in plant protection operations, offering practical guidelines for optimizing spraying conditions and improving pesticide use efficiency in different canopy structures.

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Anti-Drift Technology Progress of Plant Protection Applied to Orchards: A Review

Cited by 5 publications

References 79 publications

Spray performance of flexible shield canopy opener and rotor wind integrated boom‐sprayer application in soybean: effects on droplet deposition distribution

Spray performance of flexible shield canopy opener and rotor wind integrated boom‐sprayer application in soybean: effects on droplet deposition distribution

The Influence of Working Speed on the Quality Parameters for Spraying in Vineyards

Multifactorial analysis and experiments affecting the effect of fog droplet penetration in fruit tree canopies

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