PEST MANAGEMENT SCIENCE
·
2024
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IF 3.8
Jiayi Ma,Sheng Xiang,Yanxia Shi,Xuewen Xie,Ali Chai,Lei Li,Baoju Li,Tengfei Fan
BACKGROUND The use of pesticides in greenhouse vegetable cultivation is necessary and significant. However, traditional pesticide application methods such as the use of backpack sprayers with water-diluted pesticides have certain drawbacks, e.g., uneven distribution, high labor intensity, and safety risks. RESULTS In this work, fluazinam ultra-low-volume liquids (Flu-ULVs) were prepared using oily solvents as carriers. The effects of different oils on the physical properties of the preparations were investigated. The Flu-ULV can be sprayed directly using a hand-held ultra-low-volume (ULV) sprayer without dilution with water. Compared with commercial water-based suspension concentrates of fluazinam, the Flu-ULV samples showed better wetting of tomato leaves, better atomization, and more uniform droplet distribution. At a dosage of 300 mL/ha, the coverage rate of tomato leaves ranged from 32.47% to 79.3%, with a droplet deposition density of 556 to 2017 droplets/cm 2 . Application of Flu-ULVs provided 70.86% control efficacy against gray mold in tomatoes, which was higher than those achieved with reference products. Dermal exposure to Flu-ULVs was also evaluated in greenhouse experiments. The coverage rates for all parts of the operator's body ranged from 0.02% to 0.07%, with deposition volumes of 2.23 to 12.26 μg/cm 2 . CONCLUSION Ground ULV spraying of fluazinam was proved to be an effective and safe management option for the control of tomato gray mold in greenhouses. This study laid a foundation for the use of ultra-low volume spray to control vegetable diseases in greenhouse, especially those induced by high humidity environment. © 2024 Society of Chemical Industry.
研究领域:
植物保护
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农学
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Bin Li,Zhonggang Wang
The sensing materials and portable devices with high sensitivity and specific recognition are urgently demanded for monitoring the pesticide residue in soil, water and food. Herein, two fluorescent porous polymers with carbazole-based chromophores decorated by n- butyls are synthesized through A3 + B2 and A3 + B4 condensation polymerizations, respectively. The hierarchical pores ranging from ultramicropore to mesopore are adjustable by varying the crosslinking density in the networks. The fluorescent quenching coefficient and limit of detection for trifluralin exceptionally reach 4.57 × 10 5 M −1 and 6.0 ppb, and the polymers exhibit ultra-sensitive recognizable ability for trifluralin in water. The quenching efficiencies for trifluralin in water, aqueous solutions of various cations and anions, vegetable juice and soil filtrate remain nearly the same. In particular, the fabricated polymer plates are portable and show visual fluorescent quenching for trifluralin solution at an extremely low concentration, and the plates can be easily recovered and repeatedly used. The results revealed in this manuscript are helpful for deeply understanding the effects of porosity parameters and alkyl-decorated chromophore groups on the sensitive and recognizable sensing mechanism for trifluralin.
研究领域:
环境科学
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材料科学
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分析化学
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高影响因子
JOURNAL OF PLANT PATHOLOGY
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2022
·Vol. 104
·期 3
·979-992
·
IF 2.643
Mosa Mohamed A.,El-Abeid Sozan E.,Khalifa M. M. A.,Elsharouny T. H.,El-Baz Sahar M.,Ahmed Ayman Y.
Mesoporous silica nanoparticles (MSNs) can promote the solubility and absorption of pesticides by plants and are widely used as a delivery system to improve the efficacy of pesticide applications. In this study, MSNs with 20 nm particle size were produced. Additionally, a water-soluble chitosan (CS) derivative, here called N-(2-Hydroxyl) propyl-3- tri-methyl-ammonium CS chloride (HTCC) was produced and used to cap the outer surface of the MSNs preloaded with the pesticide fludioxonil (Flu). The HTCC coating layers resulted in a pesticide loading efficiency of 84% on the MSNs in comparison to a loading efficiency of 20% of uncoated particles. A comparative in vitro analysis indicated that Flu@MSNs 20nm -HTCC loaded with a 0.05 mg/L dose of fungicide had significant higher fungicidal activity than the same fungicide at 1 mg/L dose against F. oxysporum f. sp. radicis-lycopersici (FORL). Moreover, after an initial burst, MSNs 20nm -HTCC kept releasing Flu for 21 d, compared to an activity of 7 d associated with the direct release of Flu. Greenhouse data showed that 0.1 mg/L Flu applied through MSNs 20nm -HTCC is sufficient to reduce Fusarium crown and root rot disease severity to a value of less than 6% in tomato plants, without any noticeable phytotoxicity after 70 d. In comparison, 1.56 mL/L of the fungicide are required to reach a 27% disease severity level. Thus, we suggest that HTCC-decorated MSNs 20nm has a great potential as a nanodelivery systems for agrochemical applications. We also suggest that this work contributes to the notion that agro-nanotechnology is a powerful, environmentally-safe and cost-effective approach for a sustainable and long term protection of plants from disease.
研究领域:
植物病理学
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纳米技术
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农业科学
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2025
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IF 6.2
Chengqi Zhang,Ying Wang,Ziyun He,Aoran Wang,Zikuo Li,Xuheng Gao,Haoxue Xia,Wende Liu,Guangfei Tang
Fusarium graminearum is a preeminent fungal pathogen exacting a heavy toll on global crop production. Fludioxonil, a highly effective broad-spectrum fungicide, has been extensively deployed to mitigate the devastation wrought by F. graminearum. Nevertheless, the molecular mechanisms of fludioxonil resistance in this pathogen remain largely enigmatic. In this study, we identify a novel point mutation (L837F) in FgOs1 (osmosensor-like histidine kinase), which is located in the HIS_KIN (histidine kinase) domain. Biological assays revealed that the FgOs1L837F mutation reduced the ability of F. graminearum to adapt to low-temperature stress, osmotic stress, and metal ion stress and also decreased its pathogenicity. Additionally, this mutation did not confer cross-resistance to the fungicides phenamacril, tebuconazole, and carbendazim. To facilitate field monitoring, we employed allele-specific PCR (AS-PCR) to detect FgOs1L837F point mutation in F. graminearum. This study offers crucial support for fungal disease control and crop protection.
研究领域:
植物病理学
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农业微生物学
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分子植物病理学
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真菌遗传学
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农药抗性机制
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作物保护
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信号转导
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PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2021
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IF 3.196
Qianqian Geng,Pingyang Sun,Gang Tang,Pingliang Li,Yuxiu Zhai
Poor water solubility results in limited fungicidal bioavailability and poses a great risk to non-target organisms due to the use of organic solvent in formulation processing. Here, the water solubility of fludioxonil (Flu) was improved by generating an inclusion complex with β-cyclodextrin (β-CD) at 1:1 host-guest stoichiometric ratio. The formation of the inclusion complex was confirmed by SEM, XRD, FT-IR, DSC, and 1 H-NMR spectra. Molecular docking simulation found that Flu was imbedded into the β-CD cavity, folded, and centrally aligned inside. In addition, Flu/β-CD displayed increased soil mobility, sustained release behavior, and a 2.75-fold increase of the fungicidal activity against Botrytis cinerea . Importantly, the prepared inclusion complex exhibited decreased acute toxicity to phytoplankton ( Chlorella vulgaris ), zooplankton ( Daphnia magna ), and fish ( Danio rerio ) than technical Flu. This study provided useful information for the rational use of Flu in agriculture, as well as the reduction of ecological risk to the aquatic environment.
研究领域:
农业科学
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环境科学
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药物化学
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DOI
高影响因子
PEST MANAGEMENT SCIENCE
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2024
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IF 3.8
Shuning Chen,Ao Yuan,Huafeng Wang,Daibin Yang,Li Cui,Fengjiao Hao,Xiaojing Yan,Huizhu Yuan
BACKGROUND Citrus huanglongbing (HLB) is a devastating disease in citrus, caused by Candidatus Liberibacter asiaticus (CLas), which primarily resides in the phloem where chemicals cannot effectively reach, posing a significant challenge in controlling HLB. To address these challenges, plant essential oils (EOs), widely used as transdermal enhancers and known for their benefits for plant tissues, were investigated for their potential to enhance chemical permeation. RESULTS In this study, seven EOs – eugenol, carvacrol, eucalyptol, geraniol, linalool, cinnamaldehyde, and d -limonene – were evaluated for their potential to enhance chemical penetration into citrus leaves. Preliminary screening with tracer methods revealed that geraniol provided the greatest enhancement of permeation, achieving the deepest and broadest distribution into the spongy tissue of the citrus leaf. The permeation levels of rhodamine B and crystal violet through the cuticular layer were elevated from 0.55 mg L −1 and 0.11 mg L −1 to 20.04 mg L −1 and 7.14 mg L −1 , respectively, by the addition of geraniol. Further validation through high-performance liquid chromatography–mass spectrometry (HPLC–MS) confirmed that the penetration of fludioxonil and tetracycline into citrus leaf tissues was enhanced by 15.07-fold and 20.43-fold, respectively. In planta experiments confirmed that adding geraniol to tetracycline and oxytetracycline via foliar application eliminated CLas bacteria in HLB-affected citrus more efficiently than controls. CONCLUSION Our study underscores the potential of geraniol as an effective EO-based permeation enhancer for combating HLB. By significantly improving the delivery and efficacy of bactericidal treatments, geraniol offers a promising strategy for managing this catastrophic citrus disease, potentially transforming the approach to controlling HLB. © 2024 Society of Chemical Industry.
研究领域:
植物病理学
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农业化学
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植物化学
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Ze Lv,Xiaohan Meng,Qianwei Liang,Tianzhen Jiang,Shaoyang Sun,Yifei Tan,Jianguo Feng
Film mulching is one of the most important methods to control soil-borne diseases. However, the traditional mulch may cause microplastic pollution and soil ecological damage. Herein, a biodegradable film was developed using oxidized starch and carboxymethyl chitosan and incorporated ZIF-8 carrying fludioxonil to sustainably control soil-borne disease. The microstructure, mechanical properties, optical properties, and water barrier properties of the composite films (Flu@ZIF-8-OS/CMCS) were investigated. The results show that Flu@ZIF-8-OS/CMCS had a smooth and uniform surface and excellent light transmittance. The excellent mechanical properties of the films were verified by tensile strength , elongation at break and Young's modulus . Higher contact angle and lower water vapor permeability indicate water retention capacity of the soil was improved through using Flu@ZIF-8-OS/CMCS. Furthermore, the release properties, biological activity, degradability and safety to soil organisms of Flu@ZIF-8-OS/CMCS was determined. The addition of ZIF-8 significantly improved the film's ability to retard the release of Flu, while the Flu@ZIF-8-OS/CMCS has good soil degradability. In vitro antifungal assays and pot experiments demonstrated excellent inhibitory activity against Fusarium oxysporum f. sp. Lycopersici . Flu@ZIF-8-OS/CMCS caused only 13.33 % mortality of earthworms within 7 d. This research provides a new approach to reducing microplastic pollution and effectively managing soil-borne diseases.
研究领域:
农业科学
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材料科学
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环境科学
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植物病理学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hongjing Shen,Baolong Wang,Chenyu Qi,Weizhen Li,Wenfeng Zhou,Haixiang Gao
Developing active targeting strategies for agrochemical delivery is paramount for simultaneously enhancing fungicide efficacy and mitigating off-target environmental risks. This study reports the development of wheat germ agglutinin (WGA)-functionalized mesoporous silica nanoparticles (MSNs) as a nanocarrier system designed to actively target fungal cell walls. These MSNs were loaded with the fungicide Fluazinam (Flu) to yield Flu@MSNs-WGA, which exhibited an average hydrodynamic diameter of 44.54 nm and a Fluazinam loading content of 10.89 % ± 0.27 %. Studies investigating transport and distribution in rice plants demonstrated that the WGA-functionalized nanoparticles were absorbed by roots and leaves and exhibited specific accumulation at sites of Rhizoctonia solani infection, confirming active targeting. Furthermore, In vitro assays revealed that the antifungal activity of Flu@MSNs-WGA against R. solani was significantly enhanced compared to the non-targeted nanocarrier (Flu@MSNs-COOH) and was 2.7 times higher than that of a commercial Fluazinam suspension concentrate (Flu SC) formulation. Representing the first application of WGA for targeted pesticide delivery, this work validates the feasibility of this approach, providing essential proof-of-concept and technical support for developing novel, actively targeted nano-pesticides for improved crop protection.
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高影响因子
DYES AND PIGMENTS
·
2026
·
IF 3.9
Shen Zhang,Zhuo Wang
In consideration of the potential threat, the establishment of efficient approach for fluazinam determination is necessary. Based on the superior property of carbon dots and biomass, sulfur doped biomass-based carbon dots (SBCDs) were constructed using a simple hydrothermal approach, in which peanuts were applied as carbon sources with the addition of methionine. The well-dispersed SBCDs displayed optimal emission wavelength of 435 nm under the excitation wavelength of 364 nm. Owing to the detection principle of fluorescence quenching through static quenching and inner filter effects, the SBCDs were used to detect fluazinam with a broad linear range of 0-100 μM and a detection limit of 0.026 μM. Additionally, the SBCDs also exhibited temperature sensing with a wide linear range of 15-95 °C. Moreover, the as-prepared SBCDs were effectively used for the determination of fluazinam in tap water and orange juice samples. The SBCDs displayed tremendous potential for the sensing of fluazinam and temperature.
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高影响因子
Micro & Nano Letters
·
2020
·Vol. 15
·期 9
·606-609
·
IF 0.975
Zhifeng Cai,Shulin Pang,Xinru Ma,Li Zhu,Yefan Zhang,Fang Tian,Caifeng Zhang
In this contribution, polyvinyl pyrrolidone capped copper nanoclusters (PVP-Cu NCs) were synthesised through a one-pot route possessing the advantages of rapidness and environmental friendliness. Also, the optical characteristics of the as-prepared Cu NCs were characterised using fluorescence spectroscopy, UV–vis absorption spectroscopy. The structure and composition were studied through Fourier transform infrared, transmission electron microscopy, X-ray photoelectron spectroscopy. It exhibited good water solubility, excellent photo stability, and resistance to sodium chloride. The Cu NCs revealed blue fluorescence and displayed excitation-dependent fluorescence characteristics. More importantly, the fluorescence intensity of PVP-Cu NCs was linearly quenched in the range of 5–80 μM (concentrations of fluazinam) and the detection limit was 0.98 μM. Finally, the fluorescence sensor was successfully employed to detect fluazinam in natural water samples.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2018
·
IF 3.412
Jiale Yang,Chen Fan,Gang Tang,Wenbing Zhang,Hongqiang Dong,You Liang,Yanfei Wang,Mingqiang Zou,Yongsong Cao
To elucidate the relationship between the structure of ionic liquid (IL) and its enrichment ability to trace pesticides from an environmental water sample, a series of imidazole-based ILs were synthesized to extract four fungicides (boscalid, cyprodinil, fluazinam, and pyrimethanil) through an in situ ionic liquid dispersive liquid–liquid microextraction method. The results showed that aromatic heterocyclic monocation ionic liquids (MILs) had better extraction ability to fungicides than other three alicyclic heterocyclic MILs. Dication ionic liquids (DILs) with the four carbons at the side chain had better ability to extract fungicides than MILs, and DILs with a long bridge carbon chain had better recoveries of fungicides with low Kow values. The proposed method showed high mean enrichment factors and high recoveries of the fungicides from real water samples. The rules of the relationship between the structure of IL and enrichment ability are instructive to the application of ILs in pretreatment of complex substances.
研究领域:
环境科学
·
分析化学
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PubMed
高影响因子
危险品化学品经营许可证（带存储）