1
|
Hassan ZU, Abbas Z, Bakht K, Ayoub MH, Ahmad S, Khan AM, Farooq U, Khan MS, Shaikh AJ. Dynamic light scattering and zeta-potential as a tool for understanding the mechanism of pesticides binding toward individual components of transition metal nanoparticles and graphene oxide hybrids. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2022; 57:932-947. [PMID: 36469565 DOI: 10.1080/03601234.2022.2147348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Pesticides present in their commercial formulations are studied for their preferable binding toward carbon-based graphene oxide (GO) or transition metal nanoparticles (Fe, Co, Ni, and Cu), present as hybrids. This simple study also reveals the mechanism of interaction of few selected different classes of pesticides, namely, λ-cyhalothrin, imidacloprid, and metsulfuron-methyl toward these hybrids. Individually, to study this comparative binding when hybrids are not used, the understanding of preferred binding toward any of these selected compounds could be challenging, costly, and time-consuming. Dynamic light scattering (DLS) is used to study the changes observed for hydrodynamic radius and zeta potential for the stability of the resulting products. This simple method can also be extended to identify the binding mechanism for other diverse set of combinations. These studies are supported by binding of GO with nanoparticles in batch adsorption and the best fit using Langmuir and Freundlich isotherms is presented. Moreover, pesticide adsorption toward GO-nanoparticle composites is also evidenced.
Collapse
Affiliation(s)
- Zia Ul Hassan
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Zameer Abbas
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Khush Bakht
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | | | - Shehryar Ahmad
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Asad Muhammad Khan
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Umar Farooq
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Muhammad Saqib Khan
- Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad, Pakistan
| | | |
Collapse
|
2
|
Cui J, Sun C, Wang A, Wang Y, Zhu H, Shen Y, Li N, Zhao X, Cui B, Wang C, Gao F, Zeng Z, Cui H. Dual-Functionalized Pesticide Nanocapsule Delivery System with Improved Spreading Behavior and Enhanced Bioactivity. NANOMATERIALS 2020; 10:nano10020220. [PMID: 32012747 PMCID: PMC7074971 DOI: 10.3390/nano10020220] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 01/20/2020] [Accepted: 01/23/2020] [Indexed: 01/05/2023]
Abstract
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.
Collapse
Affiliation(s)
| | | | | | - Yan Wang
- Correspondence: (Y.W.); (H.C.); Tel.: +86-10-82105997 (Y.W.); +86-10-82106013 (H.C.)
| | | | | | | | | | | | | | | | | | - Haixin Cui
- Correspondence: (Y.W.); (H.C.); Tel.: +86-10-82105997 (Y.W.); +86-10-82106013 (H.C.)
| |
Collapse
|
3
|
Gao Y, Li X, He L, Li B, Mu W, Liu F. Role of Adjuvants in the Management of Anthracnose-Change in the Crystal Morphology and Wetting Properties of Fungicides. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:9232-9240. [PMID: 31347839 DOI: 10.1021/acs.jafc.9b02147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The hydrophobic wax layer of pepper fruit (Capsicum frutescens L.) increases the importance of selecting adjuvants that improve the wetting property of droplets on the target organism and increase the effective utilization of fungicides. In this study, the effect of adjuvants including nonionic, cationic, organosilicone, and oils on the wettability of fungicides was determined. The critical micelle concentrations for S903 (organosilicone), 1227 (cationic), AEO-5 (nonionic), GY-Tmax (oil), and XP-2 (oil) were 25, 1000, 100, 200, and 500 mg/L, respectively. Interface behaviors and in vivo tests suggested that adjuvants at appropriate concentrations (S903, 2.5 mg/L; 1227, 100 mg/L; AEO-5, 1 mg/L; GY-Tmax, 50 mg/L; and XP-2, 5 mg/L) resulted in optimum efficiency. Adjuvants significantly increased the inhibitory activity of pyraclostrobin against the mycelial growth, spore germination, and germ tube elongation of Colletotrichum scovillei by 41.3-58.8%, 28.2-44.6%, and 27.8-39.8%, respectively. Pyraclostrobin amended with S903 and XP-2 showed higher efficacy against anthracnose than the fungicide alone on pepper fruit. The increased efficacy may have resulted from the changed crystal morphology (ellipses of similar sizes), improved wettability, and rainfastness. A structural equation model indicated that surface tension and retention play the most important roles in the application properties of fungicide. In field experiments, the efficacy of pyraclostrobin with adjuvants showed no significant difference with pyraclostrobin alone, which indicated that, except for adjuvants, other spraying technologies are important for improving the field performance of fungicides. These results provide a foundation for the synthesis of highly efficient fungicides based on crystal structure and for the sustainable management of pepper anthracnose.
Collapse
Affiliation(s)
- Yangyang Gao
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests , Shandong Agricultural University , Tai'an , Shandong 271018 , P. R. China
- College of Plant Protection , Shandong Agricultural University , Tai'an , Shandong 271018 , P. R. China
| | - Xiaoxu Li
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests , Shandong Agricultural University , Tai'an , Shandong 271018 , P. R. China
- College of Plant Protection , Shandong Agricultural University , Tai'an , Shandong 271018 , P. R. China
| | - Lifei He
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests , Shandong Agricultural University , Tai'an , Shandong 271018 , P. R. China
- College of Plant Protection , Shandong Agricultural University , Tai'an , Shandong 271018 , P. R. China
| | - Beixing Li
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests , Shandong Agricultural University , Tai'an , Shandong 271018 , P. R. China
- College of Plant Protection , Shandong Agricultural University , Tai'an , Shandong 271018 , P. R. China
| | - Wei Mu
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests , Shandong Agricultural University , Tai'an , Shandong 271018 , P. R. China
- College of Plant Protection , Shandong Agricultural University , Tai'an , Shandong 271018 , P. R. China
| | - Feng Liu
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests , Shandong Agricultural University , Tai'an , Shandong 271018 , P. R. China
- College of Plant Protection , Shandong Agricultural University , Tai'an , Shandong 271018 , P. R. China
| |
Collapse
|
4
|
Zhang XP, Jing TF, Zhang DX, Luo J, Li BX, Liu F. Assessment of ethylene glycol diacetate as an alternative carrier for use in agrochemical emulsifiable concentrate formulation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 163:349-355. [PMID: 30059879 DOI: 10.1016/j.ecoenv.2018.07.090] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Revised: 07/19/2018] [Accepted: 07/22/2018] [Indexed: 06/08/2023]
Abstract
The conventional emulsifiable concentrate (EC) formulation contains a large amount of aromatic solvents, which causes adverse effects to both the environment and human health due to the toxicity of the solvents. Here, we developed a 2.5% lambda-cyhalothrin EC formulation with ethylene glycol diacetate (EGDA) as the solvent, and the developed formulation serves as an environmental-friendly alternative to overcome the adverse effects of aromatic solvents. The physicochemical characterizations, wettability properties, phytotoxicity and bioassays of the EGDA-EC formulation were systematically investigated and compared with that of the EC formulation with xylene as the solvent. The results showed that both EC formulations had excellent emulsion properties and storage stabilities. Additionally, the EGDA-EC formulation possessed a higher flash point (96 °C), indicating safer production, storage and transport. The retentions of the EGDA-EC sample on leaves were 1.22-1.46-fold higher than that of the xylene-EC sample, and the EGDA-EC also exhibited lower surface tensions and contact angles, which would benefit decreasing drift-off and improving utilization. Furthermore, the bioassays demonstrated that the EGDA-EC formulation had lower acute toxicity to aquatic organisms and higher control efficacy to target insects compared with the xylene-EC formulation. Therefore, EGDA is a promising carrier for oil-soluble agrochemicals to improve their application performance and reduce their adverse effects.
Collapse
Affiliation(s)
- Xian-Peng Zhang
- Key Laboratory of Pesticide Toxicology & Application Technique, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Tong-Fang Jing
- Key Laboratory of Pesticide Toxicology & Application Technique, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Da-Xia Zhang
- Key Laboratory of Pesticide Toxicology & Application Technique, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; Research Center of Pesticide Environmental Toxicology, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Jian Luo
- Key Laboratory of Pesticide Toxicology & Application Technique, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Bei-Xing Li
- Key Laboratory of Pesticide Toxicology & Application Technique, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Feng Liu
- Key Laboratory of Pesticide Toxicology & Application Technique, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, PR China.
| |
Collapse
|
5
|
Shao H, Xi N, Zhang Y. Microemulsion formulation of a new biopesticide to control the diamondback moth (Lepidoptera: Plutellidae). Sci Rep 2018; 8:10565. [PMID: 30002386 PMCID: PMC6043531 DOI: 10.1038/s41598-018-28626-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 06/18/2018] [Indexed: 12/20/2022] Open
Abstract
This study was designed to develop a microemulsion formulation of norcantharidin for the control of the diamondback moth (DBM), Plutella xylostella (Linnaeus), a notorious pest of brassica crops worldwide. The oil phase was screened and selected based on norcantharidin solubility while the surfactants were selected on the basis of their efficiency to form microemulsion. Optimized batches were selected using pseudo ternary phase diagrams. The microemulsion system were stabilized using mixtures composed of norcantharidin, surfactants (Tx13 and Tw80), and cosurfactant (ethanol). Its physicochemical characteristics were also demonstrated to have a higher cloud point than 72 °C as well as good thermodynamic and dilution stability. In additon, a subsequent insecticidal bioassay indicated that the acute LC50 for norcantharidin microemulsion to P. xylostella was estimated to be 12.477 mg/L (11.58-13.41, 95% CL). Our results provide an environment-friendly promising alternative to control P. xylostella and possibly contribute to ameliorating any pesticide resistance in P. xylostella.
Collapse
Affiliation(s)
- Hainan Shao
- Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Na Xi
- Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yalin Zhang
- Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China.
| |
Collapse
|
6
|
Preparation and properties of microemulsion detergent with linear medium chain fatty alcohols as oil phase. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.09.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
7
|
Cui B, Feng L, Wang C, Yang D, Yu M, Zeng Z, Wang Y, Sun C, Zhao X, Cui H. Stability and Biological Activity Evaluation of Chlorantraniliprole Solid Nanodispersions Prepared by High Pressure Homogenization. PLoS One 2016; 11:e0160877. [PMID: 27500828 PMCID: PMC4976933 DOI: 10.1371/journal.pone.0160877] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 07/26/2016] [Indexed: 11/19/2022] Open
Abstract
Poorly water-soluble compounds are difficult to develop as pesticide products and face great challenges in water-based and environmentally friendly formulation development. In this study, high pressure homogenization combined with lyophilization was adopted to prepare the solid nanodispersions of chlorantraniliprole with poor solubility and high melting point. The mean particle sizes of the solid nanodispersions with different pesticide contents were all less than 75 nm, even when the content was up to 91.5%. For the 2.5% chlorantraniliprole solid nanodispersion with the mean particle size of 29 nm, the suspensibility and wetting time in water were 97.32% and 13 s, respectively. The re-dispersibility and wettability were superior to those of conventional water dispersible granules. The retention on the rice leaf of 18.7 mg/cm2 was 1.5 and 3 times that of commercial aqueous suspension concentrate and pure water. The bioassay result to diamondback moths indicated that the toxicity of the solid nanodispersion was 3.3 and 2.8 times that of technical and aqueous suspension concentrate, respectively. Moreover, the solid nanodispersion has the advantages of total avoidance of organic solvents, significant reduction of surfactants and feasibility of obtaining high concentration nanoformulations. The solid nanodispersion is an attractive candidate for improving pesticide solubility and efficacy, and its application in crop production will reduce both residues in food and environmental pollution of pesticide.
Collapse
Affiliation(s)
- Bo Cui
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lei Feng
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Chunxin Wang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Dongsheng Yang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Manli Yu
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhanghua Zeng
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yan Wang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Changjiao Sun
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiang Zhao
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Haixin Cui
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
- * E-mail:
| |
Collapse
|
8
|
Enhanced oil recovery in high temperature carbonates using microemulsions formulated with a new hydrophobic component. J IND ENG CHEM 2016. [DOI: 10.1016/j.jiec.2016.05.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
9
|
Wang C, Tai X, Du Z, Liu X. Formulation and physicochemical properties of promising avermectin microemulsion with biodegradable surfactant and oil. J DISPER SCI TECHNOL 2016. [DOI: 10.1080/01932691.2016.1172315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Chuanxin Wang
- China Research Institute of Daily Chemical Industry, Taiyuan, China
| | - Xiumei Tai
- China Research Institute of Daily Chemical Industry, Taiyuan, China
| | - Zhiping Du
- China Research Institute of Daily Chemical Industry, Taiyuan, China
- Institute of Resources and Environment Engineering, Shanxi University, Taiyuan, China
| | - Xiaoying Liu
- Institute of Resources and Environment Engineering, Shanxi University, Taiyuan, China
| |
Collapse
|
10
|
Hu J, Akula N, Wang N. Development of a Microemulsion Formulation for Antimicrobial SecA Inhibitors. PLoS One 2016; 11:e0150433. [PMID: 26963811 PMCID: PMC4786163 DOI: 10.1371/journal.pone.0150433] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 02/13/2016] [Indexed: 11/19/2022] Open
Abstract
In our previous study, we have identified five antimicrobial small molecules via structure based design, which inhibit SecA of Candidatus Liberibacter asiaticus (Las). SecA is a critical protein translocase ATPase subunit and is involved in pre-protein translocation across and integration into the cellular membrane in bacteria. In this study, eleven compounds were identified using similarity search method based on the five lead SecA inhibitors identified previously. The identified SecA inhibitors have poor aqueous solubility. Thus a microemulsion master mix (MMX) was developed to address the solubility issue and for application of the antimicrobials. MMX consists of N-methyl-2-pyrrolidone and dimethyl sulfoxide as solvent and co-solvent, as well as polyoxyethylated castor oil, polyalkylene glycol, and polyoxyethylene tridecyl ether phosphate as surfactants. MMX has significantly improved the solubility of SecA inhibitors and has no or little phytotoxic effects at concentrations less than 5.0% (v/v). The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of the SecA inhibitors and streptomycin against eight bacteria including Agrobacterium tumefaciens, Liberibacter crescens, Rhizobium etli, Bradyrhizobium japonicum, Mesorhizobium loti, and Sinorhizobium meliloti phylogenetically related to Las were determined using the broth microdilution method. MIC and MBC results showed that the 16 SecA inhibitors have antibacterial activities comparable to that of streptomycin. Overall, we have identified 11 potent SecA inhibitors using similarity search method. We have developed a microemulsion formulation for SecA inhibitors which improved the antimicrobial activities of SecA inhibitors.
Collapse
Affiliation(s)
- Jiahuai Hu
- Citrus Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Lake Alfred, Florida, United States of America
| | - Nagaraju Akula
- Citrus Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Lake Alfred, Florida, United States of America
| | - Nian Wang
- Citrus Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Lake Alfred, Florida, United States of America
- * E-mail:
| |
Collapse
|
11
|
Li J, Fan T, Xu Y, Wu X. Ionic liquids as modulators of physicochemical properties and nanostructures of sodium dodecyl sulfate in aqueous solutions and potential application in pesticide microemulsions. Phys Chem Chem Phys 2016; 18:29797-29807. [DOI: 10.1039/c6cp04722j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The change of morphology of ILs/SDS aggregates with increased concentration of ILs.
Collapse
Affiliation(s)
- Jing Li
- College of Science
- China Agricultural University
- China
| | - Tengfei Fan
- College of Resources and Environmental Sciences
- China Agricultural University
- China
| | - Yong Xu
- College of Science
- China Agricultural University
- China
| | - Xuemin Wu
- College of Science
- China Agricultural University
- China
| |
Collapse
|
12
|
Cui B, Feng L, Pan Z, Yu M, Zeng Z, Sun C, Zhao X, Wang Y, Cui H. Evaluation of Stability and Biological Activity of Solid Nanodispersion of Lambda-Cyhalothrin. PLoS One 2015; 10:e0135953. [PMID: 26281043 PMCID: PMC4539193 DOI: 10.1371/journal.pone.0135953] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 07/28/2015] [Indexed: 11/19/2022] Open
Abstract
Pesticides are essential agrochemicals used to protect plants from diseases, pests and weeds. However, the formulation defects of conventional pesticides cause food toxicity and ecological environmental problems. In this study, a novel, efficient and environmentally friendly formulation of lambda-cyhalothrin, a solid nanodispersion, was successfully developed based on melt-emulsification and high-speed shearing methods. The solid nanodispersion presented excellent advantages over conventional pesticide formulations in such formulation functions as dispersibility, stability and bioavailability. The formulation is free of organic solvents, and the use of surfactant is reduced. Therefore, the application of the solid nanodispersion in crop production will improve efficacy and reduce the occurrence of both pesticide residues in food and environmental pollution from pesticides.
Collapse
Affiliation(s)
- Bo Cui
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lei Feng
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhenzhong Pan
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
- College of Natural Resources and Environment, College of Plant Science, Jilin University, Changchun, China
| | - Manli Yu
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhanghua Zeng
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Changjiao Sun
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiang Zhao
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yan Wang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Haixin Cui
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
- * E-mail:
| |
Collapse
|
13
|
Microemulsion formulation of Carbendazim and its in vitro antifungal activities evaluation. PLoS One 2014; 9:e109580. [PMID: 25310219 PMCID: PMC4195661 DOI: 10.1371/journal.pone.0109580] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Accepted: 09/05/2014] [Indexed: 11/19/2022] Open
Abstract
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.
Collapse
|