Influence of Plant Leaf Moisture Content on Retention of Electrostatic-Induced Droplets

Ma, Jing; Liu, Kuan; Chen, Chenggong; Ahmad, Fiaz; Qiu, Baijing

doi:10.3390/su132111685

Cited by 3 publications

(2 citation statements)

References 27 publications

(34 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, some researchers choose to add an electrostatically assisted approach. Electrostatic spraying technology uses corona, induction and contact charging to electrify the droplets, creating an electrostatic field between the charged droplets and the branches and leaves of the canopy, improving droplet penetration 39–42 . However, this method cannot expand the pore transport channels of branches and leaves, and results in some droplets being intercepted by branches and leaves on the canopy surface.…”

Section: Resultsmentioning

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

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

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

View full text Add to dashboard Cite

show abstract

“…A spray system [23] was built to generate droplet clusters when spraying under crop protection conditions. The spray system consisted of a standard fan nozzle (Lechler ST110-02; Lechler Inc., Ulmer Strasse, Metzingen, Germany), a diaphragm pump (PLD-1205; yinong plant protection equipment co., ltd, Shijiazhuang, China), a controller (SMC AR-3000; SMC China Co., Shanghai, China), and a water tank (volume, 40 L) connected via plastic hoses.…”

Section: Spray Systemmentioning

confidence: 99%

Effects of Leaf Surface Roughness and Contact Angle on In Vivo Measurement of Droplet Retention

Liu

Dong

et al. 2022

Agronomy

Self Cite

View full text Add to dashboard Cite

Droplet retention during pesticide application is a serious problem because run-off droplets flow out of the target area and pose a hazard to human health and the environment. The present study was conducted with the aim to measure the droplet retention of sprayed droplets on crop leaves in vivo using a constructed test system. In the measurement, three crop species with different surface properties (tomato, chili pepper, and winter wheat) were selected for droplet retention determination, and the variations in the time intervals of maximum retention and stable retention were determined. Contact angle and surface roughness (Ra), which are the most important surface properties of crop leaves, were used as independent variables. The Ra values of tomato, pepper, and winter wheat were 24.73 μm, 5.28 μm, and 17.59 μm, respectively, while the contact angles of tomato, pepper, and winter wheat were 97.67°, 70.07° and 131.98°, respectively. The results showed that the curves of droplet retention on sprayed tomato and wheat leaves had similar patterns over time and could be divided into four periods (rapidly increasing period, slowly increasing period, collapsing period, and stable period). The maximum droplet retention on tomato leaf surface was Rmax = 0.169 g⋅cm−2, and the stable retention was Rst = 0.134 g⋅cm−2. The maximum droplet retention on the surface of winter wheat leaf was Rmax = 0.244 g⋅cm−2, and the stable retention was Rst = 0.093 g⋅cm−2. However, droplet retention on pepper leaves was different from that on tomato and wheat leaves. The curve pattern of droplet retention on pepper leaves over time showed two peaks and two valleys. Moreover, the maximum retention, Rmax, was in the range of 0.149~0.151 g⋅cm−2, and the stable retention was Rst = 0.077 g⋅cm−2. It is expected that the obtained results can be used to characterize the properties of crop leaves and that this study can contribute to the improvement of droplet retention for effective chemical application and the reduction in the environmental pollution caused by agricultural pesticides.

show abstract

Drop impact dynamics on the hydrophobic leaf surface of an aquatic plant: a case study of Pistia stratiotes

Papierowska

Beczek

Mazur

et al. 2023

Journal of Experimental Botany

View full text Add to dashboard Cite

Pistia stratiotes is an aquatic plant with a complex structure that allows it to stay afloat. It grows quickly, and in large numbers becomes an undesirable plant as an invasive species. Describing the dynamics of a water drop splash on P. stratiotes leaves can contribute to increasing knowledge of its behavior and finding alternative methods for eradicating it or using it for the benefit of the environment. The non-wettable surface of P. stratiotes presents a complex structure—simple uniseriate trichomes and also ridges and veins. We analyzed the drop impact on a leaf placed on the water surface and recorded it by high-speed cameras. Based on the recordings, quantitative and qualitative analyses were performed. After impacting the leaf, the water drop spread until it reached its maximum surface area accompanied by the ejection of early droplets in the initial stage. Thereafter, three scenarios of water behavior were observed: (i) drop receding and stabilization; (ii) drop receding and ejection of late droplets formed in the later stage as an effect of elastic deformation of the leaf; and (iii) drop breaking apart and ejection of late droplets. The results indicated that the increasing kinetic energy of the impacting drops expressed by the Weber number and the complex leaf surface have an effect on the course of the splash. The simple uniseriate trichomes of the P. stratiotes leaf and the high energy of the falling drops were responsible for the formation and characteristics of the early droplets. The presence of ridges and veins and the leaf’s mechanical response had an impact on the occurrence of late droplets.

show abstract

Influence of Plant Leaf Moisture Content on Retention of Electrostatic-Induced Droplets

Cited by 3 publications

References 27 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

Effects of Leaf Surface Roughness and Contact Angle on In Vivo Measurement of Droplet Retention

Drop impact dynamics on the hydrophobic leaf surface of an aquatic plant: a case study of Pistia stratiotes

Contact Info

Product

Resources

About