An effective spray drift-reducing method for a plant-protection unmanned aerial vehicle

Chen, Yayong; Hou, Chao; Tang, Yu; Zhuang, Jiajun; Lin, Jintian; Luo, Shaohua

doi:10.25165/j.ijabe.20191205.4289

Cited by 16 publications

(7 citation statements)

References 17 publications

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“… Zhu et al (2010) used a PWM controller to achieve high-precision spray. Chen et al (2019) proposed a spray system that can adjust the spray angle and pressure according to the wind speed and its changes to reduce droplet drift. Akkoyun (2019) improved the spray range and reduced the use of pesticides by changing the nozzle distribution on the UAV’s boom.…”

Section: Techniques For Improving the Deposition Effectmentioning

confidence: 99%

Research on Methods Decreasing Pesticide Waste Based on Plant Protection Unmanned Aerial Vehicles: A Review

Kaizu

Huang

et al. 2022

Front. Plant Sci.

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In plant protection, the increasing maturity of unmanned aerial vehicle (UAV) technology has greatly increased efficiency. UAVs can adapt to multiple terrains and do not require specific take-off platforms. They do well, especially in farmland areas with rugged terrain. However, due to the complex flow field at the bottom of a UAV, some of the droplets will not reach the surface of a plant, which causes pesticide waste and environmental pollution. Droplet deposition is a good indicator of the utilization rate of pesticides; therefore, this review describes recent studies on droplet deposition for further method improvement. First, this review introduces the flight altitude, speed, and environmental factors that affect pesticide utilization efficiency and then summarizes methods to improve pesticide utilization efficiency from three aspects: nozzles, electrostatic sprays, and variable spray systems. We also point out the possible direction of algorithm development for a UAV’s precision spray.

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Section: Techniques For Improving the Deposition Effectmentioning

confidence: 99%

Research on Methods Decreasing Pesticide Waste Based on Plant Protection Unmanned Aerial Vehicles: A Review

Kaizu

Huang

et al. 2022

Front. Plant Sci.

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“…Spray drift is considered to be one of the bottlenecks and biggest problems for pesticide application technology . Drift leads to damage to susceptible off-target species, reduces the effectiveness of the pesticide, and leads to environmental contamination . For example, herbicide glyphosate spray-drift has a long-term effect on the phenotypic response such as seed size and shoot length and might lead to adaptations and cascading ecological impacts.…”

Section: Future Prospects and Conclusionmentioning

confidence: 99%

Clay-Nanocomposite Based Smart Delivery Systems: A Promising Tool for Sustainable Farming

Pal

Kaur

Dwivedi

et al. 2022

ACS Agric. Sci. Technol.

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Clay-nanocomposite materials have been widely exploited as drug delivery systems, but their application in agriculture is less explored. In clay-nanocomposite, the combination of nanoclay and the active ingredient (i.e., metal, nonmetal, oxide nanoparticles) can produce a biocompatible and environmentally friendly delivery vehicle of micronutrients, pesticides, etc. for better crop growth. Clay-nanocomposites have been researched to address the problem of nontarget effects of agrochemicals, their leaching into groundwater, and the fast breakdown of sprayed chemicals. Here, we present a review of the synthesis of clay-based nanocomposites and their application as a delivery vehicle for agrochemicals and nucleic acids, as well as their antimicrobial properties. This review would be helpful in identifying and addressing the current issues of the delivery of active ingredients and biological macromolecules for crop protection, improved growth, and sustainability.

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“…Many researchers have conducted a lot of research on the drift phenomenon and its influencing factors, including the spray parameters [13,14], airflow parameters [15,16], and other factors [17]. By analyzing the droplets' drift process, Felsot [18] concluded that the main factors were the spray method and droplet size and proposed that protective shields and buffer zones should be used to reduce droplet drift.…”

Section: Introductionmentioning

confidence: 99%

Research on Droplets Deposition Characteristics of Anti-Drift Spray Device with Multi-Airflow Synergy Based on CFD Simulation

et al. 2022

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With the increase in orchard areas and the transfer of rural labor, various air-assisted sprayers have been widely used in China. However, the problem of off-target drift still exists, which has caused pesticide waste and environmental pollution. In order to improve the droplet deposition in the canopy of fruit trees, a V-shaped anti-drift spray device with multi-airflow synergy was designed in this paper. A droplet spatial motion model was constructed, and the anti-drift mechanism of multi-airflow synergy was clarified based on particle dynamics analysis. The influences of spray pressure and V-shaped wind speed on droplet movement were investigated by Matlab, and the experimental results showed that the machine’s anti-drift effect was better when the V-shaped wind speed ranged from 15 m/s to 25 m/s. According to modern orchards with low root stock in a high-density planting, a simulation model of the flow field between the spray device and the fruit trees canopy was established by the method of computational fluid mechanics (CFD). By considering crosswind speed, V-shaped wind speed, and spray pressure, three-level simulation experiments of droplet deposition were designed for each factor using a partial multivariate orthogonal regression method. The influence of V-shaped wind speed on the droplets’ spatial distribution was analyzed, and the prediction model of the drift distance of the droplets’ deposition center was established. The simulation results showed that the three factors had a significant influence on the droplets’ deposition characteristics, and the degree from big to small was V-shaped wind speed, crosswind speed, and spray pressure. The fitting degree of the prediction model was high, and the correlation coefficient was 0.998. The anti-drift experiments of the machine were carried out, and the results showed that when the crosswind speed, the spray pressure, and V-shaped wind speed were 2.2 m/s, 0.52 MPa, and 20.8 m/s, respectively, the droplet drift rate was 29.2% lower than that of single-airflow. The drift distance of the droplets deposition center was 5.0 cm, which was consistent with the prediction model. The research can provide a basis for the design and parameters optimization of the similar sprayers used in modern orchards with low root stock in a high-density planting.

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An effective spray drift-reducing method for a plant-protection unmanned aerial vehicle

Cited by 16 publications

References 17 publications

Research on Methods Decreasing Pesticide Waste Based on Plant Protection Unmanned Aerial Vehicles: A Review

Research on Methods Decreasing Pesticide Waste Based on Plant Protection Unmanned Aerial Vehicles: A Review

Clay-Nanocomposite Based Smart Delivery Systems: A Promising Tool for Sustainable Farming

Research on Droplets Deposition Characteristics of Anti-Drift Spray Device with Multi-Airflow Synergy Based on CFD Simulation

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