Novel chitosan-based nanocomposites as ecofriendly pesticide carriers: Synthesis, root rot inhibition and growth management of tomato plants

• Published in: Carbohydrate polymers Vol. 282; p. 119111
• Main Authors: Elsherbiny, Abeer S., Galal, Alyaa, Ghoneem, Khalid M., Salahuddin, Nehal A.
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 15.04.2022
• Subjects: Acrolein - administration & dosage; Acrolein - analogs & derivatives; Acrolein - chemistry; Adsorption; Aniline Compounds - administration & dosage; Aniline Compounds - chemistry; Antifungal activity; Antioxidants; Antioxidants - administration & dosage; Antioxidants - chemistry; Bentonite - administration & dosage; Bentonite - chemistry; Benzaldehydes - administration & dosage; Benzaldehydes - chemistry; Biological Control Agents - administration & dosage; Biological Control Agents - chemistry; Chitosan - administration & dosage; Chitosan - chemistry; Chitosan-nanocomposites; Drug Liberation; Fusarium - drug effects; Fusarium - growth & development; Lycopersicon esculentum - growth & development; Lycopersicon esculentum - microbiology; Nanocomposites - administration & dosage; Nanocomposites - chemistry; Plant Diseases - prevention & control; Plant Roots - growth & development; Plant Roots - microbiology; Plants; Polyaniline; Pythium - drug effects; Pythium - growth & development; Wilt and root rot; Antioxidants; Wilt and root rot; Antifungal activity; Plants; Polyaniline; Chitosan-nanocomposites
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2022.119111

Novel bio-based nanocomposites were developed as carriers for loading and sustained-release of vanillin (Van.) and cinnamaldehyde (Cinn.) antioxidants. The composites were obtained by intercalation of chitosan (CS) into sodium montmorillonite (CS/Mt), incorporation of chitosan with polyaniline (CS/PANI) and chitosan/polyaniline/exfoliated montmorillonite (CS/PANI/Mt). The structure and morphology of composites were characterized by FTIR, XRD, SEM and TEM. The release data of Van. and Cinn. from CS and CS/Mt obeyed well zero-order equation. However, Higuchi and Korsmeyer-Peppas models fitted well the release data from CS/PANI and CS/Mt composites. Their antifungal activity was examined towards Fusarium oxysporum and Pythium debaryanum. In vitro assay, CS, Cinn., Van., CS/PANI and CS/PANI/Cinn., have a strong inhibitory effect on the linear growth of the target pathogens, even at lower concentrations. Greenhouse assay indicated that seedling treatment by the loaded CS/PANI/Cinn and CS/Mt/Cinn. reduced both disease index and disease incidence parameters of both pathogens and possessed seedlings growth promoting potential of tomato compared to untreated-infected controls. [Display omitted]