Study on the Performance of Lambda Cyhalothrin Microemulsion with Biodiesel as an Alternative Solvent

Chin, Chih-Ping; Lan, John Chi-Wei; Wu, Ho‐Shing

doi:10.1021/ie201151p

Cited by 26 publications

(26 citation statements)

References 15 publications

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“…Studies have indicated that the control efficiency of pesticide microemulsions is superior to those of ordinary emulsions, wettable powders, and other pesticide formulations [16] , [17] . It has been reported that a microemulsion of λ-cyhalothrin possesses better performance and stability than its commercial formulation [18] . Similarly, a microemulsion of triadimefon displayed significantly better antifungal activity against R. solani AG1-IA, when compared to a 20% triadimefon emulsion [17] .…”

Section: Introductionmentioning

confidence: 99%

Microemulsion Formulation of Carbendazim and Its In Vitro Antifungal Activities Evaluation

Leng

Zhang

Li³

et al. 2014

PLoS ONE

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The fungus Rhizoctonia solani Kuhn is a widespread and destructive plant pathogen with a very broad host range. Although various pathogens, including R. solani, have been traditionally controlled using chemical pesticides, their use faces drawbacks such as environmental pollution, development of pesticide resistance, and other negative effects. Carbendazim is a well-known antifungal agent capable of controlling a broad range of plant diseases, but its use is hampered by its poor aqueous solubility. In this study, we describe an environmentally friendly pharmaceutical microemulsion system using carbendazim as the active ingredient, chloroform and acetic acid as solvents, and the surfactants HSH and 0204 as emulsifiers. This system increased the solubility of carbendazim to 30 g/L. The optimal microemulsion formulation was determined based on a pseudo-ternary phase diagram; its physicochemical characteristics were also tested. The cloud point was greater than 90°C and it was resistant to freezing down to −18°C, both of which are improvements over the temperature range in which pure carbendazim can be used. This microemulsion meets the standard for pesticide microemulsions and demonstrated better activity against R. solani AG1-IA, relative to an aqueous solution of pure carbendazim (0.2 g/L). The mechanism of activity was reflected in the inhibition of against R. solani AG1-IA including mycelium growth, and sclerotia formation and germination were significantly better than that of 0.2 g/L carbendazim water solution according to the results of t-test done by SPSS 19.

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Section: Introductionmentioning

confidence: 99%

Microemulsion Formulation of Carbendazim and Its In Vitro Antifungal Activities Evaluation

Leng

Zhang

Li³

et al. 2014

PLoS ONE

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“…5,37,44,45 Nowadays green microemulsions are already on the market. 32,42,43,46 Especially mono-alkyl esters made from renewable biological sources such as vegetable oils or animal fats have been investigated, and the physical properties of microemulsions with these compounds as the oil phase are of growing interest.…”

Section: Introductionmentioning

confidence: 99%

“…As early as in the 1960s, cuphea, with its vast diversity of fatty acids, 56,57 was proposed as a source of fatty acids with medium chain lengths. 58 In recent years, biodiesel has gained importance in a great number of research and industrial processes, for example as green solvents, [59][60][61] in cleaning and degreasing agents 62 or cleaning up of oil spills, 63 as polymerization solvents, 64 in pesticides 43,46,65 or as an alternative to organic solvents in liquid-liquid extractions 66 and last but not least as biofuels. Biodiesel based microemulsions have already been made and tested 41 and the produced bicontinuous microemulsion-fuels are effective fuels with low emissions.…”

Section: Introductionmentioning

confidence: 99%

Microemulsions with renewable feedstock oils

2012

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In this paper we discuss the influence of chemical structures of renewable feedstock oils (RFOs) on the domains of existence and the nano-structures of microemulsions. We compare the results to those of classical microemulsions containing classical n-alkanes. First, the domains of microemulsions obtained from the melt of water, sodium dodecyl sulfate (SDS) as surfactant, 1-pentanol as co-surfactant and different RFOs (or RFO melts) in pseudo-ternary phase diagrams are presented. A surfactantco-surfactant mass ratio of 1 : 2 is kept constant and the RFO (or RFO melt) is considered as a pseudo-constituent. Two different fatty methyl ester (FAME) biodiesels from rapeseed and cuphea oils, rapeseed oil, "TBK" biodiesel from rapeseed oil, limonene, and different mixtures of limonene to FAME-rapeseed biodiesel and FAME-rapeseed biodiesel to FAME-cuphea biodiesel are used as RFOs or RFO melts. Second, conductivity data are shown along an experimental path having a constant RFO or RFO melt : (surfactant-co-surfactant) mass ratio, whereas the water content is varied. All obtained data are then compared to data from previous studies with a series of n-alkanes (from n-hexane to n-hexadecane). As the main conclusion it is found that RFOs or RFO melts can easily substitute n-alkanes. From the chemical structure of the oils, it appears that not only the polarity of the oil plays an important role but also does the absolute size of the oil molecules. In all cases microemulsion systems exhibit percolative behavior.

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“…Surfactants are substances composed of hydrophilic and hydrophobic groups that can substantially reduce the surface tension of a solution [47]. In recent years, surfactants have commonly been mixed to further improve their performance by taking advantage of their synergistic effects [48].…”

Section: Complex Surfactantsmentioning

confidence: 99%

Dual-Functionalized Pesticide Nanocapsule Delivery System with Improved Spreading Behavior and Enhanced Bioactivity

et al. 2020

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The prevention and control of pests and diseases are becoming increasingly difficult owing to extensive pesticide resistance. The synergistic use of pesticides for disease control is an effective way of slowing pesticide resistance, reducing the number of pesticide applications, and protecting the environment. In this study, a dual-functionalized pesticide nanocapsule delivery system loaded with two active ingredients (AIs)—validamycin and thifluzamide—was developed to prevent and control rice sheath blight; the nanocapsule system was based on a water–oil–water double emulsion method combined with high-pressure homogenization technology. Our results showed that the dual-functionalized pesticide nanocapsules were monodisperse spheres with a mean particle size of ~260 nm and had good storage stability. Compared with commercial formulations, the dual-functionalized pesticide nanocapsules exhibited good foliar spread owing to their small size, which is beneficial for reducing the loss of pesticides on the leaves. The 50% median effect concentration and synergistic ratio against Rhizoctonia solani of the dual-functionalized pesticide nanocapsules and commercial formulation were 0.0082 and 0.0350 μg/mL, and 2.088 and 0.917, respectively. These findings indicate that the bioactivity of the dual-functionalized system was significantly better than that of the commercial formulations and that the dual-functionalized system demonstrated a clear synergistic effect between the two AIs. The system presented here is simple, fast, and capable of dual-pesticide loading with significant synergistic effects. Our findings could help to facilitate the improvement of pesticides efficiency and the slowing of pesticide resistance.

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Study on the Performance of Lambda Cyhalothrin Microemulsion with Biodiesel as an Alternative Solvent

Cited by 26 publications

References 15 publications

Microemulsion Formulation of Carbendazim and Its In Vitro Antifungal Activities Evaluation

Microemulsion Formulation of Carbendazim and Its In Vitro Antifungal Activities Evaluation

Microemulsions with renewable feedstock oils

Dual-Functionalized Pesticide Nanocapsule Delivery System with Improved Spreading Behavior and Enhanced Bioactivity

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