Porous starch citrate biopolymer for controlled release of carbofuran in the management of root knot nematode Meloidogyne incognita .
| Autor: | Fabiyi OA; Department of Crop Protection, Faculty of Agriculture, University of Ilorin, Nigeria., Saliu OD; Department of Industrial Chemistry, Faculty of Physical Sciences, University of Ilorin, Nigeria.; Department of Chemical Sciences, University of Johannesburg, South Africa., Claudius-Cole AO; Department of Crop Protection and Environmental Biology, University of Ibadan, Nigeria., Olaniyi IO; Department of Crop Protection, Faculty of Agriculture, University of Ilorin, Nigeria., Oguntebi OV; Department of Crop Protection, Faculty of Agriculture, University of Ilorin, Nigeria., Olatunji GA; Department of Industrial Chemistry, Faculty of Physical Sciences, University of Ilorin, Nigeria. |
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| Jazyk: | angličtina |
| Zdroj: | Biotechnology reports (Amsterdam, Netherlands) [Biotechnol Rep (Amst)] 2020 Jan 30; Vol. 25, pp. e00428. Date of Electronic Publication: 2020 Jan 30 (Print Publication: 2020). |
| DOI: | 10.1016/j.btre.2020.e00428 |
| Abstrakt: | The undesirable environmental impacts of inappropriate application of pesticides have brought about research into new matrices for controlled release of pesticides. Porous starch citrate biopolymer was designed for the release of carbofuran in this experiment and characterized using Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Thermo-Gravimetric Analysis (TGA) for functional group, surface morphology and thermal stability properties respectively. The SEM revealed highly stabilized porous starch citrate biopolymers with porous structures and gradients suitable for controlled release studies. The transmittance bands at 3347, 1714 and 1073 cm -1 for OH, CO and COC-[bond, double bond]-- stretching vibrations further confirms the successful synthesis of the biopolymer. TGA showed an increase in the thermal stability after citric acid modification with one-step decomposition from 290 ᵒ C to 500 ᵒ C. From Korsemeyer-Peppas model, the carbofuran-porous starch citrate (CBFN/PRS/STH/CTRT) followed a lower diffusion release model with gradual increment in all the quantity of carbofuran loaded. An accelerated rate of diffusion percentage was seen in direct application of carbofuran. Egg hatch and mortality of juveniles were recorded on daily basis for seven days. Direct application of carbofuran (CBFN/DRT) and carbofuran-porous starch citrate biopolymer gave the best results with significant (p < 0.05) reduction in egg hatch and higher percentage mortality. The rate of release of carbofuran from the starch citrate bio polymer matrix was significantly lower than the direct application, and in spite of the slow rate of release, higher juvenile mortality and reduction in egg hatch was achieved. Competing Interests: This is to state clearly that, there is no conflict of interest among all the authors who have participated in putting together the content of this manuscript. (© 2020 Published by Elsevier B.V.) |
| Databáze: | MEDLINE |
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