Effect of surfactant concentration on the spreading properties of pesticide droplets on Eucalyptus leaves

Lin, Huan; Zhou, Hongping; Li, Xu; Zhu, Heping; Huang, Huanhua

doi:10.1016/j.biosystemseng.2016.01.003

Cited by 52 publications

(39 citation statements)

References 28 publications

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“…e boom has three types of working status, including shapes of "-," "U," and "Ո." e prototype control system enables intelligent target spraying [30][31][32] and dynamically controls the number of nozzles activated in accordance with the presence of crops. e presence of crops could be identified by using an infrared optoelectronic sensor on the nozzles.…”

Section: Case Studymentioning

confidence: 99%

Reconfigurability Evaluation of Multifunctional Intelligent Boom Sprayer Based on Fuzzy Comprehensive Evaluation

Zheng

et al. 2020

Mathematical Problems in Engineering

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Multifunctional intelligent boom sprayer is a development direction of boom sprayers, and it could satisfy needs of precision and variable spraying and achieve aims of sustainable development of pesticide spraying, ecological protection, and efficient plant protection by reconfiguring its structures. Therefore, the evaluation of multifunctional intelligent boom sprayer reconfigurability has a role in improving product reconfigurability while reducing product function redundancy and production costs and reducing product function redundancy and production cost. In order to comprehensively evaluate the reconfigurability of a multifunctional intelligent boom sprayer, this paper established an evaluation index system and realized the evaluation process by using fuzzy comprehensive evaluation, analytic hierarchy process, and validity test. The evaluation result would avail to directly and effectively guide product optimization and upgrade process in accordance with quantitatively analyzed evaluation indexes of intelligent boom sprayer reconfigurability by using mathematical methods such as analytic hierarchy process and validity test in evaluation process. The index system was formed from six components, which were key design information, quality, cost, efficiency, intelligence, and operational capability. Index weights were calculated by the analytic hierarchy process. Finally, a multifunctional shiftable boom intelligent sprayer was evaluated for product reconfigurability improvements by using the evaluation method. Reconfigurability evaluation result of the multifunctional shiftable boom intelligent sprayer belonged to "good" evaluation interval by the calculation of formulas. There was further room to improve product reconfigurability, as the membership degree in the “good” evaluation interval was below 0.5. The study could provide a scientific basis for improving the reconfigurability, technical performance, and operation quality of products in intelligent boom sprayer design. In addition, it may be possible to decrease the arbitrary nature of subjective design factors and support economic and ecological goals when businesses upgrade products.

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Section: Case Studymentioning

confidence: 99%

Reconfigurability Evaluation of Multifunctional Intelligent Boom Sprayer Based on Fuzzy Comprehensive Evaluation

Zheng

et al. 2020

Mathematical Problems in Engineering

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“…This makes it difficult for aqueous insecticide spray droplets to adhere to the insect surface, and the droplets subsequently bounce or roll off, resulting in low pesticide utilization and a high economic burden. In agricultural crops, increasing the wettability of pesticide liquids on plant leaves is considered to be an effective way to improve utilization . However, studies of how to improve liquid wetting on the complicated bio‐surface of real pests have not been well carried out, and could be a cause of the bottleneck in the development of effective pesticide formulations.…”

Section: Introductionmentioning

confidence: 99%

“…Feasible approaches to improve droplet wettability depend on modifying a fluid's properties by adding surfactants to pesticide formulations, because changing the properties of insect surfaces is impractical. Surfactants are widely used in plant insecticides to reduce the surface energy of solutions, thereby enhancing the wetting of pesticides on plant leaves and improving the biological efficacy of the active ingredients . However, previous research has shown that, in some cases, the droplet may still bounce off hydrophobic plant surfaces despite the surface tension being sufficiently low .…”

Section: Introductionmentioning

confidence: 99%

“…In agricultural crops, increasing the wettability of pesticide liquids on plant leaves is considered to be an effective way to improve utilization. 9 However, studies of how to improve liquid wetting on the complicated bio-surface of real pests have not been well carried out, and could be a cause of the bottleneck in the development of effective pesticide formulations.…”

Section: Introductionmentioning

confidence: 99%

“…Surfactants are widely used in plant insecticides to reduce the surface energy of solutions, thereby enhancing the wetting of pesticides on plant leaves and improving the biological efficacy of the active ingredients. 9,13 However, previous research has shown that, in some cases, the droplet may still bounce off hydrophobic plant surfaces despite the surface tension being sufficiently low. 14 Therefore, the properties of surfactant solutions and solid surfaces may not be the only factors affecting wetting behavior, and noncovalent interactions between them should also be considered.…”

Section: Introductionmentioning

confidence: 99%

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The wetting behavior of three different types of aqueous surfactant solutions on housefly (Musca domestica) surfaces

Wan

Zhao

et al. 2019

Pest Management Science

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BACKGROUND It is difficult for insecticide spray droplets to adhere to highly hydrophobic pest surfaces, and this is an important reason behind the low utilization of pesticides. Greater understanding of the wetting behaviors of agro‐surfactants on pest surfaces is of great importance in pesticidal applications. RESULTS This research investigated the wetting processes of three surfactant solutions [TritonX‐100 (TX‐100), sodium dodecyl sulfate (SDS) and dodecyl trimethyl ammonium bromide (DTAB)] on housefly surfaces based on surface tension, contact angles and solid–liquid interaction. As the surfactant concentration increased, the wetting abilities of the solutions improved due a decrease in liquid surface tension. The decrease in contact angles followed an inverted ‘S’ shape until the concentration exceeded the critical micelle concentration, at which point surfactant adsorption was saturated at the interfaces. The nonionic surfactant TX‐100 enhanced wettability more than the ionic surfactants SDS and DTAB. The wetting states of the three surfactant solutions on housefly surfaces transformed to the Wenzel state when the surfactant molecules adsorbed at solid–liquid interfaces (ΓSL) were 3.09–5.36 times higher than those adsorbed at liquid–air interfaces (ΓLV). More insecticides attached to housefly surfaces and pesticide utilization was significantly improved after adding TX‐100 to the pesticide solution. CONCLUSION Surfactant TX‐100 could be a practical and efficient candidate adjuvant for insecticide spraying of houseflies. This research investigated the wetting mechanism of three different types of surfactant solutions on housefly surfaces, and could provide effective guidance for the preparation of insecticide formulations and pesticide adjuvants with better wettability to improve pesticide utilization. © 2019 Society of Chemical Industry

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Efficient pesticide formulation and regulation mechanism for improving the deposition of droplets on the leaves of rice (Oryza sativa L.)

Zheng

Cao

Chen

et al. 2021

Pest Management Science

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BACKGROUND: The effective deposition of pesticide droplets on the target leaf surface is critical for improving the utilization of pesticides. We proposed a new way to enhance the droplet deposition on the target leaf surface by changing the properties of pesticide formulation, and this formulation can be sprayed directly or at a low dilution. In addition, it is a simple method to select a suitable concentration and formulation by evaluating the interfacial dilational rheological properties of pesticide droplets. RESULTS:The wetting behavior of two types of pesticide formulations prepared by oil-based solvent on the rice leaf surface was investigated based on the surface free energy, surface tension, contact angle, adhesion tension, and adhesion work. The interfacial dilational rheological properties of different pesticide solutions were measured as a function of concentration. This study clearly demonstrates the fact that water-in-oil emulsion has a better wettability than oil-in-water emulsion, especially with the increase of the concentration of the solution, the droplets can be wetted and spread faster on the leaves. Compared with vegetable oil (methyl oleate), mineral oil (solvent oil No. 200) has smaller dilational modulus and surface tension, showing excellent wetting properties. CONCLUSION:The water-in-oil emulsion prepared with solvent oil No. 200 has the smallest dilational modulus, and the spray droplets spread rapidly to the maximum wetting area on the rice leaves, which can be used in an ultra-low volume spray. The results provide new insights into how to increase the deposition of droplets on superhydrophobic leaf surfaces by screening formulations and concentrations.

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Effect of surfactant concentration on the spreading properties of pesticide droplets on Eucalyptus leaves

Cited by 52 publications

References 28 publications

Reconfigurability Evaluation of Multifunctional Intelligent Boom Sprayer Based on Fuzzy Comprehensive Evaluation

Reconfigurability Evaluation of Multifunctional Intelligent Boom Sprayer Based on Fuzzy Comprehensive Evaluation

The wetting behavior of three different types of aqueous surfactant solutions on housefly (Musca domestica) surfaces

Efficient pesticide formulation and regulation mechanism for improving the deposition of droplets on the leaves of rice (Oryza sativa L.)

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