Porous Starch Citrate Biopolymer for Controlled Release of Carbofuran in the Management of Root Knot Nematode Meloidogyne incognita
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Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
Biotechnology Reports. Elsevier
Abstract
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 ¼ 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 C to 500 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
Description
Keywords
Carbofuran Environmental pollution Porous starch Biopolymer Starch citrate
Citation
Fabiyi, O.A., Saliu, O.D., Claudius-Cole, A.O., Olaniyi, I.O., Oguntebi, O.V and Olatunji, G.A. (2020). Porous Starch Citrate Biopolymer for Controlled Release of Carbofuran in the Management of Root Knot Nematode Meloidogyne incognita. Biotechnology Reports. 25(e00428): 1-9.