Preparation of alginate–chitosan floating granules loaded with 2‐methyl‐4‐chlorophenoxy acetic acid (<scp>MCPA</scp>) and their bioactivity on water hyacinth

Hou, Ruiquan; Wu, Jian; Yang, Liupeng; Zhao, Kunyu; Huang, Suqing; Kaziem, Amir E.; Zhang, Zhixiang

doi:10.1002/ps.6414

Cited by 10 publications

(5 citation statements)

References 34 publications

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“…The preparation method of drug-loaded particles was based on the procedure of Hou et al [ 39 ], and the influence of the controllable factors on drug loading was explored.…”

Section: Methodsmentioning

confidence: 99%

Magnolol Loaded on Carboxymethyl Chitosan Particles Improved the Antimicrobial Resistance and Storability of Kiwifruits

Long

et al. 2023

Foods

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Magnolol is a natural compound extracted from the traditional Chinese medicine Magnolia officinalis, which exhibits antimicrobial properties. However, magnolol is insoluble in water and consists of a phenolic hydroxyl group, which is volatile; these factors hinder its application. In this study, a safe and environmentally friendly method to improve the microbial resistance and storability of harvested fruits is developed using the water-soluble carrier carboxymethyl chitosan (CMCS) and magnolol. Magnolol was loaded on CMCS particles to form Magnolol@CMCS antimicrobial particles, a preservation coating agent. Magnolol@CMCS particles effectively solved the problems of water insolubility and agglomeration of magnolol and reduced the size distribution D50 value of magnolol from 0.749 to 0.213 μm. Magnolol@CMCS particles showed greater toxicity against Staphylococcus aureus, Escherichia coli, and Botryosphaeria dothidea than that of magnolol alone, with effective medium concentration (EC50) values of 0.9408, 142.4144, and 8.8028 μg/mL, respectively. Kiwifruit treated with the Magnolol@CMCS solution showed delayed changes in fruit hardness and soluble solid and dry matter contents and significantly higher ascorbic acid (vitamin C) and soluble total sugar contents and sugar:acid ratios compared with that of the control fruit. In addition, no disease spots were observed on fruit treated with the Magnolol@CMCS solution within 7 days after inoculation with B. dothidea. In conclusion, Magnolol@CMCS particles showed antimicrobial activity on harvested fruits, effectively delayed the hardness and nutritional changes of fruits during storage, and improved the storability of kiwifruit.

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“…The preparation method of drug-loaded particles was based on the procedure of Hou et al [ 39 ], and the influence of the controllable factors on drug loading was explored.…”

Section: Methodsmentioning

confidence: 99%

Magnolol Loaded on Carboxymethyl Chitosan Particles Improved the Antimicrobial Resistance and Storability of Kiwifruits

Long

et al. 2023

Foods

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“…Owing to their inherent potential pathogenicity towards plants, various fungal pathogens are found to be effective biocontrol agents for the water hyacinth. Till date, the most widely explored bioherbicides in the control of water hyacinth include A. alternata, Aspergillus niger, Fusarium, few species of Myrothecium and their metabolites [91,104]. The growth and environmental conditions for these potential isolates have been optimized at the laboratory scale; however, mass production is needed to meet the demand of actual applications.…”

Section: Conclusion and Future Prospectivementioning

confidence: 99%

“…Recent expansion in this regard includes the use of carriers, granules and emulsions as formulations for the effective delivery of bioherbicides. Hou et al [104] reported the successful use of alginate granules encapsulated herbicide 2-methyl-4-chlorophenoxy acetic acid in the removal of water hyacinth plants. The floating granules themselves got collected in the vicinity of water hyacinth stems and roots thereby targeted the sustained release of herbicide [104].…”

Section: Conclusion and Future Prospectivementioning

confidence: 99%

“…Hou et al [104] reported the successful use of alginate granules encapsulated herbicide 2-methyl-4-chlorophenoxy acetic acid in the removal of water hyacinth plants. The floating granules themselves got collected in the vicinity of water hyacinth stems and roots thereby targeted the sustained release of herbicide [104]. The application of emulsion-based bioherbicides is more accepted for in situ application due to their lesser moisture requirement, favorability at dry climate, more affinity to plant surface and higher stability.…”

Section: Conclusion and Future Prospectivementioning

confidence: 99%

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Prospective of fungal pathogen‐based bioherbicides for the control of water hyacinth: A review

Sharma

Pandey

2021

J Basic Microbiol

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Over the decades the presence of aquatic weeds has caused immense biodiversity loss to the ecosystem. The use of herbicides has arisen emergence of herbicide-resistant weeds and loss of inherent flora and fauna due to the recalcitrant nature of the chemicals used. Hence, there is a need to use nontoxic, ecosustainable, low-cost, and efficient biological molecules that are analogous to chemical herbicides. Various plants, bacteria, fungi as well a few viruses are reported to secrete allelopathic biomolecules that inhibit the growth and development of weeds. However, majorly fungal pathogens and their metabolites are found to be effective biocontrol agents for the water hyacinth. The present review puts forward major findings and interventions in the biological control of the weed, water hyacinth. The biosynthesis, mechanism of action and factors regulating the activity of bioherbicides are discussed. In addition, the issues associated with the in situ application of these bioherbicides are also conferred focusing on the available mode of applications and formulation used. The major factors include the type and concentration of allelopathic biomolecules, age, type, and morphology of targeted weed, formulation type, mode of application and other physiological and environmental factors. Among various modes for the application of bioherbicides, emulsions are found to be most effective for the control of water hyacinth. Most of the toxicity studies indicated no toxicity of this fungal pathogen to other ecological plant species except water hyacinth. Yet, in-depth investigations are needed of these allelochemicals and toxins before field applications. Overall, lab-scale studies have shown promising results and highlighted a few potential fungi that need to be further explored for optimizing their bioherbicidal activity.

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“…There is a growing interest for chitosan as a carrier of agrochemicals for slow or controlled release due to its biodegradability, non-toxicity, chemical modifiability, pH-responsiveness and abundant source. [20][21][22] Chitosan is obtained by deacetylation of chitin, a natural resource found widely in crustaceans of marine arthropods such as shrimp and crabs, cell membranes of fungi and algae, shells and bones of mollusks. Chitosan has the potential to adhere to surfaces owing to the presence of hydroxyl and amine groups, which also offers the possibility for chemical functionalization.…”

Section: Introductionmentioning

confidence: 99%

Chitosan‐basedorganic/inorganic composite engineered forUV light‐controlledsmartpH‐responsivepesticide throughin situphoto‐inducedgeneration of acid

Liu

Chen

Teng

et al. 2022

Pest Management Science

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BACKGROUND: Confined by the volatile property, pesticides are overused and lost significantly during and after spraying, weakening the ecological microbalance among different species of lives. Acid-responsive pesticide is a type of smartly engineered pesticides that contribute to the improvement of utilization efficiency of pesticidal active ingredients in acid-controlled manner, whilst the implementation of acidic solutions may disturb the balance of microenvironment surrounding targeted plants or cause secondary pollution, underscoring the input of acid in a more precise strategy.RESULTS: Chitosan was chemically modified with a photoacid generator (2-nitrobenzaldehyde) serving as a light-maneuvered acid self-supplier, based on which a smart pesticide was formulated by the integration of attapulgite and organophosphate insecticide chlorpyrifos. Under the irradiation of UV light (365 nm), the modified chitosan would undergo a photolytic reaction to generate an acid and pristine chitosan, which seized the labile protons and facilitated the release of chlorpyrifos based on its inherent pH-responsive flexibility. According to the pesticide release performance, the release rate of chlorpyrifos under UV light (27.2 mW/cm 2 ) reached 78%, significantly higher than those under sunlight (22%, 4.2 mW/cm 2 ) and in the dark (20%) within the same time, consistent with the pH reduction to 5.3 under UV light and no obvious pH change for the two other situations, exhibiting an attractive UV light-controlled, acid-propelled release behavior.CONCLUSION: Compared to direct acid spray approach, the proposed in situ photo-induced generation of acid locally on the spots of applied pesticide circumvents the problem of acid contamination to nontargets, demonstrating higher efficiency and biocompatibility for the controlled delivery of acid-responsive pesticides and pest management.

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Preparation of alginate–chitosan floating granules loaded with 2‐methyl‐4‐chlorophenoxy acetic acid (MCPA) and their bioactivity on water hyacinth

Cited by 10 publications

References 34 publications

Magnolol Loaded on Carboxymethyl Chitosan Particles Improved the Antimicrobial Resistance and Storability of Kiwifruits

Magnolol Loaded on Carboxymethyl Chitosan Particles Improved the Antimicrobial Resistance and Storability of Kiwifruits

Prospective of fungal pathogen‐based bioherbicides for the control of water hyacinth: A review

Chitosan‐basedorganic/inorganic composite engineered forUV light‐controlledsmartpH‐responsivepesticide throughin situphoto‐inducedgeneration of acid

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