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Cheng X, Wang A, Cao L, Cao C, Zhao P, Yu M, Zheng L, Huang Q. Efficient delivery of the herbicide quinclorac by nanosuspension for enhancing deposition, uptake and herbicidal activity. PEST MANAGEMENT SCIENCE 2024; 80:4665-4674. [PMID: 38884421 DOI: 10.1002/ps.8182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 04/26/2024] [Accepted: 05/05/2024] [Indexed: 06/18/2024]
Abstract
BACKGROUND The presence of barnyardgrass poses a threat to global food security by reducing rice yields. Currently, herbicides are primarily applied for weed management. However, the effectiveness of herbicide deposition and uptake on barnyardgrass is limited as a consequence of the high wax content on leaves, low water solubility and extreme lipophilicity of herbicides. Therefore, it is imperative to develop novel formulations for efficient delivery of herbicides to improve herbicidal activity and reduce dosage. RESULTS We successfully prepared nanosuspension(s) (NS) of quinclorac through the wet media milling technique. This NS demonstrates excellent physical stability and maintains nanoscale during dose transfer. The deposition concentration and uptake concentration of NS on barnyardgrass were 3.84-4.47- and 2.11-2.58-fold greater than those traditional formulations, respectively. Moreover, the NS exhibited enhanced herbicidal activity against barnyardgrass at half the dosage required by conventional formulations without compromising rice safety. CONCLUSIONS These findings suggest that NS can effectively facilitate the delivery of hydrophobic and poorly water-soluble herbicide active ingredients, thereby enhancing their deposition, uptake and bioactivity. This study expands the potential application of NS in pesticide delivery, which can provide valuable support for optimizing pesticide utilization, improving economic efficiency and mitigating environmental risks. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Xuejian Cheng
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Aiping Wang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Lidong Cao
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Chong Cao
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Pengyue Zhao
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Manli Yu
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Li Zheng
- College of Science, China Agricultural University, Beijing, P. R. China
| | - Qiliang Huang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
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2
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Cheng X, Xiao J, Liu Y, Gao Q, Fang Q, Liao M, Liang B, Hu Z, Cao H. Effect of formulation on the indoxacarb and lufenuron dissipation in maize and risk assessment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:70976-70983. [PMID: 35595890 DOI: 10.1007/s11356-022-20719-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 05/05/2022] [Indexed: 06/15/2023]
Abstract
The supervised field trials were conducted in maize crops using nano-microemulsion (NM) and a commercial formulation of indoxacarb and lufenuron to evaluate the effect of nano-formulation on the dissipation pattern. A modified QuEChERS (Quick Easy Cheap Effective Rugged and Safe)-UPLC-MS/MS (ultra-performance liquid chromatography tandem mass spectrometry) method was utilized for sample analysis. Results showed that the initial deposits of indoxacarb and lufenuron in plants using nano-microemulsion were 0.98 mg/kg and 8.18 mg/kg at recommended dosage, while using the commercial formulation, they were 0.85 mg/kg and 5.53 mg/kg, respectively. Moreover, half-life (t1/2) values of using nano-microemulsion were 1.25 days and 2.51 days, which were shorter than indoxacarb (1.87 days) and lufenuron (3.00 days) from the commercial formulation, suggesting that pesticide formulations have a moderate impact on the initial deposit and dissipation rate. The terminal residue test showed that indoxacarb and lufenuron residues in maize grain and maize straw were below the available maximum residue limit (MRL, 0.01 mg/kg), suggesting 2% indoxacarb NM and 5% lufenuron NM are safe to use under the recommended dosage. The risk quotient value (RQ of indoxacarb and lufenuron equal to 17.7% and 2.4%, respectively) also revealed an acceptable risk for human consumption. These findings provide scientific evidence of the proper application of 2% indoxacarb NM and 5% lufenuron NM on maize crops.
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Affiliation(s)
- Xi Cheng
- School of Plant Protection, Anhui Agricultural University, 130 West Changjiang Road, Hefei, 230036, Anhui Province, China
- Anhui Province Key Laboratory of Integrated Pest Management On Crops, Anhui Agricultural University, Hefei, China
- Joint Laboratory of Nanopesticide Technology, Anhui Agricultural University, Hefei, China
| | - Jinjing Xiao
- School of Plant Protection, Anhui Agricultural University, 130 West Changjiang Road, Hefei, 230036, Anhui Province, China
- Anhui Province Key Laboratory of Integrated Pest Management On Crops, Anhui Agricultural University, Hefei, China
- Joint Laboratory of Nanopesticide Technology, Anhui Agricultural University, Hefei, China
| | - Yuanhui Liu
- School of Plant Protection, Anhui Agricultural University, 130 West Changjiang Road, Hefei, 230036, Anhui Province, China
| | - Qun Gao
- School of Plant Protection, Anhui Agricultural University, 130 West Changjiang Road, Hefei, 230036, Anhui Province, China
- Anhui Province Key Laboratory of Integrated Pest Management On Crops, Anhui Agricultural University, Hefei, China
- Joint Laboratory of Nanopesticide Technology, Anhui Agricultural University, Hefei, China
| | - Qingkui Fang
- School of Plant Protection, Anhui Agricultural University, 130 West Changjiang Road, Hefei, 230036, Anhui Province, China
- Anhui Province Key Laboratory of Integrated Pest Management On Crops, Anhui Agricultural University, Hefei, China
- Joint Laboratory of Nanopesticide Technology, Anhui Agricultural University, Hefei, China
| | - Min Liao
- School of Plant Protection, Anhui Agricultural University, 130 West Changjiang Road, Hefei, 230036, Anhui Province, China
- Anhui Province Key Laboratory of Integrated Pest Management On Crops, Anhui Agricultural University, Hefei, China
- Joint Laboratory of Nanopesticide Technology, Anhui Agricultural University, Hefei, China
| | - Bing Liang
- Joint Laboratory of Nanopesticide Technology, Anhui Agricultural University, Hefei, China
| | - Zhendi Hu
- Joint Laboratory of Nanopesticide Technology, Anhui Agricultural University, Hefei, China
| | - Haiqun Cao
- School of Plant Protection, Anhui Agricultural University, 130 West Changjiang Road, Hefei, 230036, Anhui Province, China.
- Anhui Province Key Laboratory of Integrated Pest Management On Crops, Anhui Agricultural University, Hefei, China.
- Joint Laboratory of Nanopesticide Technology, Anhui Agricultural University, Hefei, China.
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Sarkar DJ, Bera AK, Baitha R, Das BK. Synthesis optimization of PEG diblock copolymer-based nanoemulsion of cypermethrin through central composite design and bioefficacy evaluation against fish ectoparasite Argulus bengalensis. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02369-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Nunes B, Pinheiro D, Gomes A. Effect of sublethal concentrations of the antiparasitic ivermectin on the polychaeta species Hediste diversicolor: biochemical and behavioral responses. ECOTOXICOLOGY (LONDON, ENGLAND) 2021; 30:1841-1853. [PMID: 34224071 DOI: 10.1007/s10646-021-02444-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/08/2021] [Indexed: 06/13/2023]
Abstract
Pharmaceutical drugs have emerged as major micropollutants in aquatic ecosystems. Their presence has been systematically reported in monitoring surveys, and their wide distribution and constant presence in the wild is a direct consequence of their massive use, in both human and veterinary therapeutics. Drugs used to treat parasitic infections in livestock are major contaminants, given the amounts in which they are administered, and reach the aquatic compartment in high amounts, where they may affect non target species. Some of these drugs are prone to find their final deposit in sediments of estuarine areas, exerting their toxic effects preferentially at these locations. Sediment dwelling organisms of coastal areas, such as polychaetas, are especially prone to have their major physiological functions compromised after being exposed to pharmaceutical drugs. Ivermectin is one of the most used antiparasitic drugs, and its effects are not limited to biochemical traits, but also behavioral features may be compromised considering their neurotoxic actions. Despite these putative effects, little is known about their toxicity on polychaetas. The present study aimed to characterize the toxicity of realistic levels of ivermectin on the polychaeta Hediste diversicolor, in biochemical and behavioral terms. The obtained results showed that low levels of ivermectin are capable of causing significant disturbances in mobility and burrowing activity of exposed worms, as well as alterations of metabolic and anti-oxidant defense efficacy of exposed animals, suggesting that its environmental presence may mean a major environmental concern.
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Affiliation(s)
- B Nunes
- Departamento de Biologia da Universidade de Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal.
- Centro de Estudos do Ambiente e do Mar (CESAM), Campus de Santiago, Universidade de Aveiro, 3810-193, Aveiro, Portugal.
| | - D Pinheiro
- Departamento de Física da Universidade de Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - A Gomes
- Departamento de Biologia da Universidade de Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
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5
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Directed evolution of glycosyltransferase for enhanced efficiency of avermectin glucosylation. Appl Microbiol Biotechnol 2021; 105:4599-4607. [PMID: 34043077 DOI: 10.1007/s00253-021-11279-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 03/15/2021] [Accepted: 04/06/2021] [Indexed: 10/21/2022]
Abstract
Avermectin, produced by Streptomyces avermitilis, is an active compound protective against nematodes, insects, and mites. However, its potential usage is limited by its low aqueous solubility. The uridine diphosphate (UDP)-glycosyltransferase (BLC) from Bacillus licheniformis synthesizes avermectin glycosides with improved water solubility and in vitro antinematodal activity. However, enzymatic glycosylation of avermectin by BLC is limited due to the low conversion rate of this reaction. Thus, improving BLC enzyme activity is necessary for mass production of avermectin glycosides for field application. In this study, the catalytic activity of BLC toward avermectin was enhanced via directed evolution. Three mutants from the BLC mutant library (R57H, V227A, and D252V) had specific glucosylation activity for avermectin 2.0-, 1.8-, and 1.5-fold higher, respectively, than wild-type BLC. Generation of combined mutations via site-directed mutagenesis led to even further enhancement of activity. The triple mutant, R57H/V227A/D252V, had the highest activity, 2.8-fold higher than that of wild-type BLC. The catalytic efficiencies (Kcat/Km) of the best mutant (R57H/V227A/D252V) toward the substrates avermectin and UDP-glucose were improved by 2.71- and 2.29-fold, respectively, compared to those of wild-type BLC. Structural modeling analysis revealed that the free energy of the mutants was - 1.1 to - 7.1 kcal/mol lower than that of wild-type BLC, which was correlated with their improved activity. KEY POINTS: • Directed evolution improved the glucosylation activity of BLC toward avermectin. • Combinatorial site-directed mutagenesis led to further enhanced activity. • The mutants exhibited lower free energy values than wild-type BLC.
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6
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Bocca B, Barone F, Petrucci F, Benetti F, Picardo V, Prota V, Amendola G. Nanopesticides: Physico-chemical characterization by a combination of advanced analytical techniques. Food Chem Toxicol 2020; 146:111816. [PMID: 33080330 DOI: 10.1016/j.fct.2020.111816] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/29/2020] [Accepted: 10/11/2020] [Indexed: 01/09/2023]
Abstract
The recent application of manufactured nanomaterials (MNMs) in plant protection products (PPPs) enhances stability of the active substance (a.s.), minimizes application losses, reduces the quantities of a.s., increases coverage on leaf surface, improves precise application, etc. Besides offering benefits, there is high concern about the potential risk for human and environment associated with the use of nanopesticides. In this study, a panel of complementary methodologies were used to determine size distribution and chemical identification of four different formulations of nanopesticides. Measurements were performed by dynamic light scattering (DLS), transmission electron microscopy (TEM), asymmetric field flow fractionation-multi angle light scattering (AF4-FFF-MALS), gas/liquid chromatography with mass spectrometry (GC-MS/MS, LC-MS/MS) or diode array detector (HPLC-DAD) and inductively coupled plasma mass spectrometry (ICP-MS). Results indicated average size values in the ranges: 27.4-148.7 nm by DLS; 39.1-82.0 nm by AF4-FFF-MALS; and 42-90 nm by TEM. Linked to these nanosized particles both organic active ingredients and inorganic ones were identified. In addition, the obtained data revealed that all the four PPPs contained more than 50% of particles with number size distribution between 1 and 100 nm and, according to the European Commission definition, they can be defined as nanopesticides.
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Affiliation(s)
- B Bocca
- Environment and Health Department, Istituto Superiore di Sanità, Rome, Italy
| | - F Barone
- Environment and Health Department, Istituto Superiore di Sanità, Rome, Italy
| | - F Petrucci
- Environment and Health Department, Istituto Superiore di Sanità, Rome, Italy
| | - F Benetti
- European Center for the Sustainable Impact of Nanotechnology - Laboratory of EcamRicert Srl, Padua, Italy
| | - V Picardo
- Environment and Health Department, Istituto Superiore di Sanità, Rome, Italy
| | - V Prota
- Environment and Health Department, Istituto Superiore di Sanità, Rome, Italy
| | - G Amendola
- Environment and Health Department, Istituto Superiore di Sanità, Rome, Italy.
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Sun C, Yu M, Zeng Z, Francis F, Cui H, Verheggen F. Biocidal activity of polylactic acid-based nano-formulated abamectin on Acyrthosiphon pisum (Hemiptera: Aphididae) and the aphid predator Adalia bipunctata (Coleoptera: Coccinellidae). PLoS One 2020; 15:e0228817. [PMID: 32032382 PMCID: PMC7006901 DOI: 10.1371/journal.pone.0228817] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 01/23/2020] [Indexed: 11/25/2022] Open
Abstract
Abamectin is a common biocide used to control agricultural insect pests. However, the water insolubility of abamectin may result in extra organic solvent introduced in the environment. To solve this issue, it is desirable to develop nanoformulations to encapsulate abamectin with environment-friendly polymers. In this study, two polylactic acid based abamectin nanoformulations were prepared. The average particle sizes, measured by dynamic light scattering and transmission electron microscope, were 240 nm and 150 nm, respectively. The insecticidal activity of these nano-formulated abamectin was examined in the laboratory on the pea aphid, Acyrthosiphon pisum (Hemiptera: Aphididae). The acute toxicity of nano-formulated abamectin on non-target aphid predator Adalia bipunctata (Coleoptera: Coccinellidae) was also evaluated by topical, residual and oral exposure. The two nano-formulated abamectin had comparable insecticidal effect with commercial abamectin formulation against the pea aphid. Taking median lethal concentration (LC50) as the toxicological endpoint, nanoformulations had higher contact toxicity and lower oral toxicity to first-instar larvae of the predator A. bipunctata. These results are expected to contribute to the application of solvent-free nano-formulated pesticides that comply with the integrated pest management (IPM) strategies.
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Affiliation(s)
- Changjiao Sun
- Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium
- 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
| | | | - Haixin Cui
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
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8
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Alekseev A, Tyurin M, Khairov K, Kotina O, Odeyanko V, Danilov V, Kryukov V, Glupov V. Characterization and Biological Action of Avermectin Granules on the Moroccan Locust, Dociostaurus maroccanus (Orthoptera: Acrididae). JOURNAL OF ECONOMIC ENTOMOLOGY 2019; 112:2663-2669. [PMID: 31340041 DOI: 10.1093/jee/toz206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Indexed: 06/10/2023]
Abstract
Granules composed of alfalfa and sunflower meal that were impregnated with avermectins (AVMs) were developed for use against the Moroccan locust, Dociostaurus maroccanus (Thunberg). Laboratory experiments with granules containing 0.15% of AVMs fed to locust nymphs resulted in 100% death within 5 d. The quantification of AVM loss after exposure of AVM-containing preparative forms to UV light for various time periods was performed using high-performance liquid chromatography (HPLC). The results showed no loss of AVMs from the granules after 3 h of their exposure to UV light. The effect of UV radiation on a thin layer of the AVM solution led to the rapid degradation of AVMs. Only 0.2% of the initial AVM amount was detected after 3 h of exposure. In the granulated form, the AVM content remained stable for 10 mo when stored at room temperature in the dark. A method combining solid-phase extraction with HPLC was developed for the quantification of AVMs in locust nymphs. The granulated AVMs are characterized by their high resistance to UVB radiation. The use of plant-based granules impregnated with AVMs can be considered a very promising tool for locust control.
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Affiliation(s)
- Alexander Alekseev
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya, Novosibirsk, Russia
- Institute of Systematics and Ecology of Animals SB RAS, Frunze, Novosibirsk, Russia
| | - Maxim Tyurin
- Institute of Systematics and Ecology of Animals SB RAS, Frunze, Novosibirsk, Russia
| | - Khuramjon Khairov
- Institute of Zoology and Parasitology, Academy of Sciences of the Republic of Tajikistan, Dushanbe, Tajikistan
| | - Oxana Kotina
- Institute of Systematics and Ecology of Animals SB RAS, Frunze, Novosibirsk, Russia
| | | | - Viktor Danilov
- Federal Scientific Centre of Agro-BioTechnologies (SFSCA) RAS, Krasnoobsk, Novosibirsk, Russia
| | - Vadim Kryukov
- Institute of Systematics and Ecology of Animals SB RAS, Frunze, Novosibirsk, Russia
| | - Viktor Glupov
- Institute of Systematics and Ecology of Animals SB RAS, Frunze, Novosibirsk, Russia
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Xiao D, Cheng J, Liang W, Cheng C, Wang Q, Chai R, Yan Z, Du Y, Zhao J. Innovative Approach to Nano Thiazole-Zn with Promising Physicochemical and Bioactive Properties by Nanoreactor Construction. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:11577-11583. [PMID: 31557026 DOI: 10.1021/acs.jafc.9b03700] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Nanotechnology has provided a novel approach for the preparation of a safe and highly effective pesticide formulation. Thiazole-Zn, a widely used bactericide, was successfully prepared at nanoscale by an innovative approach of final synthesis process control. Its plausible formation mechanism based on restricted particle aggregation in a nanoreactor was elucidated. Then in order to assess the application performance of thiazole-Zn nanoparticle, the nanoformulation (NPF) was conveniently formulated. Interestingly, the physicochemical properties of NPF showed better than that of the commercial pesticide formulation (CPF) in dispersibility, wettability, spreadability, and stability. At the same time, the in vitro bioassay showed that the minimum inhibitory concentrations (MICs) of NPF against Xanthomonas oryzae pv Oryzae (XOO), Xanthomonas oryzae pv Oryzicola (XOC), Erwinia carotovora subsp. Carotovora (Jones) Holland (ECC), and Erwinia chrysanthemi pv Zeae (ECZ) were 46.88, 93.75, 93.75, and 375.00 mg/L, respectively, whereas those of CPF were 93.75, 375.00, 375.00, and 875.00 mg/L, respectively. Therefore, NPF exhibited stronger antibacterial activity against the above-mentioned pathogens. Moreover, NPF was more effective to bacterial blight of rice than CPF in field trial. As a conclusion, nanotechnology for pesticides by synthesis process control will have a potential in improving the utilization efficiency and relieving the corresponding environmental pollution.
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Affiliation(s)
- Douxin Xiao
- Institute of Pesticide and Environmental Toxicology, Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects , Zhejiang University , Hangzhou 310058 , P. R. China
| | - Jingli Cheng
- Institute of Pesticide and Environmental Toxicology, Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects , Zhejiang University , Hangzhou 310058 , P. R. China
| | - Wenlong Liang
- Institute of Pesticide and Environmental Toxicology, Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects , Zhejiang University , Hangzhou 310058 , P. R. China
| | - Cheng Cheng
- Institute of Pesticide and Environmental Toxicology, Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects , Zhejiang University , Hangzhou 310058 , P. R. China
| | - Qiangwei Wang
- Institute of Pesticide and Environmental Toxicology, Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects , Zhejiang University , Hangzhou 310058 , P. R. China
| | - Rongyao Chai
- Institute of Plant Protection and Microbiology , Zhejiang Academy of Agricultural Sciences , Hangzhou 310021 , P. R. China
| | - Zhenlong Yan
- Seed Management Station of Qujiang District , Quzhou 324022 , P. R. China
| | - Yongjun Du
- Institute of Pesticide and Environmental Toxicology, Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects , Zhejiang University , Hangzhou 310058 , P. R. China
| | - Jinhao Zhao
- Institute of Pesticide and Environmental Toxicology, Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects , Zhejiang University , Hangzhou 310058 , P. R. China
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Cui B, Lv Y, Gao F, Wang C, Zeng Z, Wang Y, Sun C, Zhao X, Shen Y, Liu G, Cui H. Improving abamectin bioavailability via nanosuspension constructed by wet milling technique. PEST MANAGEMENT SCIENCE 2019; 75:2756-2764. [PMID: 30859694 DOI: 10.1002/ps.5386] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 11/24/2018] [Accepted: 02/22/2019] [Indexed: 05/27/2023]
Abstract
BACKGROUND Poorly water-soluble and photosensitive pesticide compounds are difficult to be formulated as environmentally friendly formulations with high efficacy. Conventional wettable powder, emulsifiable concentrate and emulsion in water have disadvantages of dust drift, overuse of organic solvent and low efficacy. Therefore, there is an urgent need to construct a novel formulation to improve the bioavailability of pesticides. RESULTS An abamectin nanosuspension was developed using a wet-milling method combined with orthogonal experimental design. The average particle sizes of the abamectin nanosuspension measured by dynamic light scattering, scanning electron microscope and transmission electron microscope were 233, 90 and 140 nm, respectively. The zeta potential and sliding angle on cabbage leaves were -36.9 mV and 62°. Retention and anti-photolysis were around 1.5 and 1.6 times those of emulsions in water. Furthermore, the biological activity of the nanosuspension towards diamondback moths was approximately twice that of conventional formulations. CONCLUSION This study provides an easy and scalable technique for constructing pesticide nanosuspensions. The preparation and composition of the nanosuspension avoid the use of organic solvents. Application of the highly effective nanoformulation will significantly enhance pesticide efficacy, and reduce the dosage and environmental pollution of the pesticide. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Bo Cui
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yan Lv
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Fei Gao
- 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
| | - 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
| | - Yue Shen
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Guoqiang Liu
- 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
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11
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Wang Q, Shen M, Li W, Li W, Zhang F. Controlled-release of fluazinam from biodegradable PLGA-based microspheres. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2019; 54:810-816. [PMID: 31264918 DOI: 10.1080/03601234.2019.1634971] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Pesticides are biological or chemical substances used to manage pests and diseases. Encapsulation of pesticides in biodegradable carriers creates a slow-release system that can improve water dispersibility and prolong residual activity. We prepared two kinds of poly (lactic-co-glycolic acid)(PLGA) nanoparticles (NPs) with polyvinyl alcohol (PVA) and sodium dodecyl sulfate (SDS) surfactants. These were used to encapsulate the fungicide fluazinam (Flu) against Rhizoctonia solani using the Shirasu Porous Glass (SPG) membrane emulsification method. Both nanoparticles had uniform spherical shapes with average diameters of 314.13 nm (SDS) and 612.80 nm (PVA). The slow-release microspheres had excellent sustained-release properties, resistance to UV degradation, storage stability, leaf surface coverage and antifungal efficacy compared to the commercial formulation.
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Affiliation(s)
- Qi Wang
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing, P.R. China
| | - Mengfei Shen
- School of Materials Science and Engineering, State Key Lab of Metal Matrix Composites, Shanghai, P.R. China
| | - Wenjing Li
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing, P.R. China
| | - Wanwan Li
- School of Materials Science and Engineering, State Key Lab of Metal Matrix Composites, Shanghai, P.R. China
| | - Fang Zhang
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing, P.R. China
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