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Cellulose Nanocrystal Surface Cationization: A New Fungicide with High Activity against Phycomycetes capsici

1
College of Plant Protection, Southwest University, Chongqing 400715, China
2
Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing 400715, China
3
School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editors: Clayton Jeffryes and Si Amar Dahoumane
Molecules 2019, 24(13), 2467; https://doi.org/10.3390/molecules24132467
Received: 3 June 2019 / Revised: 2 July 2019 / Accepted: 3 July 2019 / Published: 4 July 2019
(This article belongs to the Special Issue Biogenic Nanomaterials: Versatility and Applications)
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Abstract

At present, the management of Phytophthora capsici (P. capsici) mainly relies on chemical pesticides. However, along with the resistance generated by P. capsici to these chemical pesticides, the toxicity and non-degradability of this chemical molecule may also cause serious environmental problems. Herein, a new bio-based nano-antifungal material ([email protected]) was made with coating hexadecyl trimethyl ammonium bromide (CTAB) on the surface of a cellulose nanocrystal (CNC). This material was then applied to the prevention of P. capcisi. This particle was facilely fabricated by mixing CTAB and sulfuric group modified CNC in an aqueous solvent. Compared to pure CTAB, the enrichment of CTAB on the CNC surface showed a better anti-oomycete activity both in vitro and in vivo. When [email protected] was applied on P. capsici in vitro, the inhibition rate reached as high as 100%, while on the pepper leaf, the particle could also efficiently prevent the infection of P. capsici, and achieve a disease index as low as zero Thus, considering the high safety of [email protected] in agricultural applications, and its high anti-oomycete activity against P. capsici, we believe that this [email protected] has great application potential as a new green nano-fungicide in P. capsici management during the production of peppers or other vegetables. View Full-Text
Keywords: cellulose nanocrystal; hexadecyl trimethyl ammonium bromide; quaternary ammonium salt; nano-antifungal material; Phytophthora capsici cellulose nanocrystal; hexadecyl trimethyl ammonium bromide; quaternary ammonium salt; nano-antifungal material; Phytophthora capsici
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Xiang, S.; Ma, X.; Liao, S.; Shi, H.; Liu, C.; Shen, Y.; Lv, X.; Yuan, M.; Fan, G.; Huang, J.; Sun, X. Cellulose Nanocrystal Surface Cationization: A New Fungicide with High Activity against Phycomycetes capsici. Molecules 2019, 24, 2467.

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