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Characterization of biodegradable poly-3-hydroxybutyrate films and pellets loaded with the fungicide tebuconazole [Text] / T. Volova [et al.] // Environ. Sci. Pollut. Res. - 2016. - Vol. 23, Is. 6. - P5243-5254, DOI 10.1007/s11356-015-5739-1. - Cited References:33. - This study was supported by the Russian Science Foundation (grant no. 14-26-00039). . - ISSN 0944-1344. - ISSN 1614-7499

РУБ Environmental Sciences
Рубрики:
CONTROLLED-RELEASE
   MICROBIAL-DEGRADATION
   BRASSICA-NAPUS
   OILSEED RAPE
Кл.слова (ненормированные):
Poly(3-hydroxybutyrate) -- Tebuconazole -- Slow-release formulations -- Controlled release -- Antifungal activity
Аннотация: Biodegradable polymer poly(3-hydroxybutyrate) (P3HB) has been used as a matrix to construct slow-release formulations of the fungicide tebuconazole (TEB). P3HB/TEB systems constructed as films and pellets have been studied using differential scanning calorimetry, X-ray structure analysis, and Fourier transform infrared spectroscopy. TEB release from the experimental formulations has been studied in aqueous and soil laboratory systems. In the soil with known composition of microbial community, polymer was degraded, and TEB release after 35 days reached 60 and 36 % from films and pellets, respectively. That was 1.23 and 1.8 times more than the amount released to the water after 60 days in a sterile aqueous system. Incubation of P3HB/TEB films and pellets in the soil stimulated development of P3HB-degrading microorganisms of the genera Pseudomonas, Stenotrophomonas, Variovorax, and Streptomyces. Experiments with phytopathogenic fungi F. moniliforme and F. solani showed that the experimental P3HB/TEB formulations had antifungal activity comparable with that of free TEB.

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Держатели документа:
RAS, SB, Inst Biophys, 50-50 Akad Gorodok, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Volova, Tatiana; Zhila, Natalia; Vinogradova, Olga; Shumilova, Anna; Prudnikova, Svetlana; Shishatskaya, Ekaterina; Russian Science Foundation [14-26-00039]

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Efficacy of tebuconazole embedded in biodegradable poly-3-hydroxybutyrate to inhibit the development of Fusarium moniliforme in soil microecosystems / T. G. Volova [et al.] // Pest Manag. Sci. - 2017. - Vol. 73, Is. 5. - P925-935, DOI 10.1002/ps.4367. - Cited References:43. - This study was supported by the Russian Science Foundation (grant number 14-26-00039). The authors declare no competing financial interest. . - ISSN 1526-498X. - ISSN 1526-4998

РУБ Agronomy + Entomology
Рубрики:
CONTROLLED-RELEASE
   FUNGICIDE TEBUCONAZOLE
   BRASSICA-NAPUS
   OILSEED
Кл.слова (ненормированные):
tebuconazole -- poly-3-hydroxybutyrate -- degradation -- embedding -- tebuconazole release -- fungicidal effect
Аннотация: BACKGROUND: An important line of research is the development of a new generation of formulations with targeted and controlled release of the pesticide, using matrices made from biodegradable materials. In this study, slow-release formulations of the fungicide tebuconazole (TEB) have been prepared by embedding it into the matrix of poly-3-hydroxybutyrate (P3HB) in the form of films, microgranules and pellets. RESULTS: The average rates of P3HB degradation were determined by the geometry of the formulation, reaching, for 63 days, 0.095-0.116, 0.081-0.083 and 0.030-0.055 mg day(-1) for films, microgranules and pellets respectively. The fungicidal activity of P3HB/TEB against the plant pathogen Fusarium moniliforme was compared with that of the commercial formulation Raxil Ultra. A pronounced fungicidal effect of the experimental P3HB/TEB formulations was observed in 2-4 weeks after application, and it was retained for 8 weeks, without affecting significantly the development of soil aboriginal microflora. CONCLUSION: TEB release can be regulated by the process employed to fabricate the formulation and the fungicide loading, and the TEB accumulates in the soil gradually, as the polymer is degraded. The experimental forms of TEB embedded in the slowly degraded P3HB can be used as a basis for developing slow-release fungicide formulations. (c) 2016 Society of Chemical Industry

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Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Sect, 50-50 Akademgorodok, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Volova, Tatiana G.; Prudnikova, Svetlana V.; Zhila, Natalia O.; Vinogradova, Olga N.; Shumilova, Anna A.; Nikolaeva, Elena D.; Kiselev, Evgeniy G.; Shishatskaya, Ekaterina I.; Russian Science Foundation [14-26-00039]

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