Constructing sustained-release herbicide formulations based on poly-3-hydroxybutyrate and natural materials as a degradable matrix.

Autor: Kiselev EG; School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, Russia.; Federal Research Center 'Krasnoyarsk Science Center SB RAS', Institute of Biophysics SB RAS, Krasnoyarsk, Russia., Boyandin AN; School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, Russia.; Federal Research Center 'Krasnoyarsk Science Center SB RAS', Institute of Biophysics SB RAS, Krasnoyarsk, Russia., Zhila NO; School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, Russia.; Federal Research Center 'Krasnoyarsk Science Center SB RAS', Institute of Biophysics SB RAS, Krasnoyarsk, Russia., Prudnikova SV; School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, Russia., Shumilova AA; School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, Russia., Baranovskiy SV; School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, Russia., Shishatskaya EI; School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, Russia.; Federal Research Center 'Krasnoyarsk Science Center SB RAS', Institute of Biophysics SB RAS, Krasnoyarsk, Russia., Thomas S; School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, Russia.; International and Interuniversity Centre for Nano Science and Nano Technology, Mahatma Gandhi University, Kottayam, Kerala, India., Volova TG; School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, Russia.; Federal Research Center 'Krasnoyarsk Science Center SB RAS', Institute of Biophysics SB RAS, Krasnoyarsk, Russia.
Jazyk: angličtina
Zdroj: Pest management science [Pest Manag Sci] 2020 May; Vol. 76 (5), pp. 1772-1785. Date of Electronic Publication: 2019 Dec 25.
DOI: 10.1002/ps.5702
Abstrakt: Background: The purpose of the present study was to develop ecofriendly herbicide formulations. Its main aim was to develop and investigate slow-release formulations of herbicides (metribuzin, tribenuron-methyl, and fenoxaprop-P-ethyl) of different structure, solubility, and specificity, which were loaded into a degradable matrix of poly-3-hydroxybutyrate (P(3HB)) blended with available natural materials (peat, clay, and wood flour).
Results: Differences in the structure and physicochemical properties of the formulations were studied depending on the type of the matrix. Herbicide release and accumulation in soil were associated with the solubility of the herbicide. Fourier-transform infrared spectroscopy showed that no chemical bonds were formed between the components in the experimental formulations. Degradation of the formulations in agro-transformed soil in laboratory conditions was chiefly influenced by the shape of the specimens (granules or pellets) while the effect of the type of filler (peat, clay, or wood flour) was insignificant. The use of granules enabled more rapid accumulation of the herbicides in soil: their peak concentrations were reached after 3 weeks of incubation while the concentrations of the herbicides released from the pellets were the highest after 5-7 weeks. Loading of the herbicides into the polymer matrix composed of the slowly degraded P(3HB) and natural materials enabled both sustained function of the formulations in soil (lasting between 1.5 and ≥3 months) and stable activity of the otherwise rapidly inactivated herbicides such as tribenuron-methyl and fenoxaprop-P-ethyl.
Conclusion: The experimental herbicide formulations enabled slow release of the active ingredients to soil. © 2019 Society of Chemical Industry.
(© 2019 Society of Chemical Industry.)
Databáze: MEDLINE
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