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Degradable Polyhydroxyalkanoates as Herbicide Carriers [Text] / S. V. Prudnikova [et al.] // J. Polym. Environ. - 2013. - Vol. 21, Is. 3. - P675-682, DOI 10.1007/s10924-012-0561-z. - Cited References: 31. - We thank Dr. Christopher Brigham for critical review of the manuscript prior to submission. The study was supported by the project initiated by the Government of the Russian Federation for governmental support of scientific research conducted under the guidance of leading scientists at Russian institutions of higher learning (Agreement No. 11.G34.31.0013). . - 8. - ISSN 1566-2543

РУБ Engineering, Environmental + Polymer Science
Рубрики:
CONTROLLED-RELEASE
   SOIL
   BIODEGRADATION
   POLYESTERS
   PESTICIDE
   POLY(3-HYDROXYBUTYRATE-CO-3-HYDROXYVALERATE)
   MICROSPHERES
   BACTERIA
Кл.слова (ненормированные):
Herbicide -- Haloxyfop-P-methyl -- Zellek Super -- Sustained-release formulations -- Polyhydroxyalkanoates -- Plant growth suppression
Аннотация: The biodegradable polymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) has been used to design experimental sustained-release formulations of the herbicide Zellek Super in the form of films and microgranules. The kinetics of polymer degradation and the dynamics of herbicide release show that the rate and extent of herbicide release from the polymer matrix into the soil depends on the geometry of the carrier and the proportion of the pesticide loaded into it (polymer/pesticide mass ratio). Experiments with the creeping bentgrass (Agrostis stolonifera L.) show that the formulations of the herbicide Zellek Super constructed as microgranules and films can be successfully used to suppress the growth of grasses. This study is the first to demonstrate that biodegradable polyhydroxyalkanoates can be used effectively to construct environmentally friendly sustained-release PHA-herbicide systems that can be placed into the soil together with seeds.

Держатели документа:
[Prudnikova, S. V.
Sinskey, A. J.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Boyandin, A. N.
Kalacheva, G. S.] Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia
[Sinskey, A. J.] MIT, Cambridge, MA 02139 USA : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Prudnikova, S.V.; Boyandin, A.N.; Kalacheva, G.S.; Sinskey, A.J.; Government of the Russian Federation [11.G34.31.0013]

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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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Efficacy of embedded metribuzin and tribenuron-methyl herbicides in field-grown vegetable crops infested by weeds / T. Volova, A. Demidenko, N. Kurachenko [et al.] // Environ. Sci. Pollut. Res. - 2020, DOI 10.1007/s11356-020-10359-1. - Cited References:35. - This work was supported by Project "Agropreparations of the new generation: a strategy of construction and realization" [Agreement No 074-02-2018-328] in accordance with Resolution No 220 of the Government of the Russian Federation of April 9, 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning". . - Article in press. - ISSN 0944-1344. - ISSN 1614-7499

РУБ Environmental Sciences
Рубрики:
DEFICIT IRRIGATION
   CONTROLLED-RELEASE
   YIELD
   TOMATO
   FORMULATIONS
Кл.слова (ненормированные):
Metribuzin -- Tribenuron-methyl -- Embedding -- Degradable P(3HB) -- Weed growth -- inhibition -- Quality of tomato fruits and beet roots
Аннотация: The purpose of the present study was to investigate the efficacy of the experimental formulations of the metribuzin (MET) and tribenuron-methyl (TBM) herbicides embedded in the matrix of degradable poly-3-hydroxybutyrate blended with wood flour in field-grown tomato and beet crops infested by weeds. There is a necessity to develop environmentally friendly and effective means to protect plants because of the shortcomings of the free herbicide forms such as the environmentally unsafe spray application of solutions and suspensions of the widespread metribuzin and tribenuron-methyl herbicides, removal from soil during watering events and rains, and transport to natural aquatic environments, where the herbicides accumulate in the trophic chains of biota. Free TBM is also rapidly inactivated in soil and metabolized to nontoxic products in plants. The efficacy of experimental formulations of metribuzin and tribenuron-methyl embedded in the matrix of degradable poly-3-hydroxybutyrate blended with wood flour was tested in field-grown tomato and beet crops infested with weeds. Application of metribuzin resulted in the highest productivity of tomatoes (2.3 kg/m(2)) and table beet (3.4 kg/m(2)), improved biometric parameters of tomato fruits and beet roots, and caused reduction in nitrate nitrogen concentrations in them. The mode of herbicide delivery did not affect sugar contents, but application of both metribuzin and tribenuron-methyl induced a 1.7-fold and 1.4-fold, respectively, increase in vitamin C concentrations in tomato fruits and beet roots relative to the vegetables grown on the subplots treated with free herbicides and the intact plants. Embedded herbicides can be used as preemergence herbicides in the field.

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Держатели документа:
Siberian Fed Univ, 79 Svobodnyi Av, Krasnoyarsk 660041, Russia.
SB RAS, Inst Biophys, Fed Res Ctr, Krasnoyarsk Sci Ctr, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Krasnoyarsk State Agr Univ, 90 Mir Av, Krasnoyarsk 660049, Russia.

Доп.точки доступа:
Volova, Tatyana; Demidenko, Alexey; Kurachenko, Natalia; Baranovsky, Sergey; Petrovskaya, Olga; Shumilova, Anna; Project "Agropreparations of the new generation: a strategy of construction and realization" of the Government of the Russian Federation [074-02-2018-328]

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The effect of the pesticide delivery method on the microbial community of field soil / S. Prudnikova, N. Streltsova, T. Volova // Environ. Sci. Pollut. Res. - 2020, DOI 10.1007/s11356-020-11228-7. - Cited References:119. - This study was financially supported by the Ministry of Science and Higher Education of the Russian Federation, project "Agropreparations of the new generation: a strategy of construction and realization" (Agreement No 074-02-2018-328). . - Article in press. - ISSN 0944-1344. - ISSN 1614-7499

РУБ Environmental Sciences
Рубрики:
CONTROLLED-RELEASE
2,4-DICHLOROPHENOXYACETIC ACID
DEGRADATION
Кл.слова (ненормированные):
Soil microorganisms -- Pesticides -- Slow release formulations -- Biodegradable polymer -- Poly-3-hydroxybutyrate -- P(3HB)-degrading -- microorganisms
Аннотация: The study deals with the effects of herbicides (metribuzin, tribenuron-methyl, fenoxaprop-P-ethyl) and fungicides (tebuconazole, epoxiconazole, azoxystrobin) applied to soil as free pesticides or as slow release formulations embedded in a biodegradable composite matrix on the structure of the soil microbial community. The matrix consisted of a natural biopolymer poly-3-hydroxybutyrate [P(3HB)] and a filler-one of the natural materials (peat, clay, and wood flour). The soil microbial community was characterized, including the major eco-trophic groups of bacteria, dominant taxa of bacteria and fungi, and primary P(3HB)-degrading microorganisms, such asPseudomonas,Bacillus,Pseudarthrobacter,Streptomyces,Penicillium, andTalaromyces. The addition of free pesticides adversely affected the abundance of soil microorganisms; the decrease varied from 1.4 to 56.0 times for different types of pesticides. The slow release pesticide formulations, in contrast to the free pesticides, exerted a much weaker effect on soil microorganisms, no significant inhibition in the abundance of saprotrophic bacteria was observed, partly due to the positive effects of the composite matrix (polymer/natural material), which was a supplementary substrate for microorganisms. The slow release fungicide formulations, like the free fungicides, reduced the total abundance of fungi and inhibited the development of the phytopathogensFusariumandAlternaria. Thus, slow release formulations of pesticides preserve the bioremediation potential of soil microorganisms, which are the main factor of removing xenobiotics from the biosphere.

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Держатели документа:
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.
Krasnoyarsk Sci Ctr SB RAS, Inst Biophys SB RAS, Fed Res Ctr, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Prudnikova, Svetlana; Streltsova, Nadezhda; Volova, Tatiana; Ministry of Science and Higher Education of the Russian Federation, project "Agropreparations of the new generation: a strategy of construction and realization" [074-02-2018-328]

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A study of the properties and efficacy of microparticles based on P(3HB) and P(3HB/3HV) loaded with herbicides / R. Vijayamma, H. J. Maria, S. Thomas [et al.] // J. Appl. Polym. Sci. - 2021. - Ст. e51756, DOI 10.1002/app.51756. - Cited References:57. - This work was supported by Project "Agropreparations of the new generation: a strategy of construction and realization" (Agreement No 074-02-2018-328) in accordance with Resolution No 220 of the Government of the Russian Federation of April 9, 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning". Instruments of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center Krasnoyarsk Science Center SB RAS were used. . - Article in press. - ISSN 0021-8995. - ISSN 1097-4628

РУБ Polymer Science
Рубрики:
FENOXAPROP-P-ETHYL
CONTROLLED-RELEASE
BIODEGRADABLE
Кл.слова (ненормированные):
biodegradable -- drug delivery systems -- microparticles
Аннотация: The wide use of pesticides in agriculture has caused uncontrolled distribution of these chemicals in the environment, calling for the development and investigation of new environmentally friendly formulations, which would reduce human impact on nature. In the present study, the metribuzin (MET), tribenuron-methyl (TBM), and fenoxaprop-P-ethyl (FPE) herbicides were encapsulated in microparticles of degradable microbial polymers - polyhydroxyalkanoates (PHAs) - of two types - poly-3-hydroxybutyrate [P(3HB)] and poly(3-hydroxybutyrate-co-3-hydroxyvalerate [P(3HB/3HV)]. The use of P(3HB) resulted in higher yields of microparticles (63% to 79%) and larger sizes of the particles, whose average diameter was 0.60 +/- 0.06-0.75 +/- 0.11 mu m, while the average diameter of copolymer particles varied between 0.43 +/- 0.12 and 0.55 +/- 0.05 mu m. Encapsulation efficiency was rather determined by the type of herbicide and its solubility, varying from 24.7% to 48.2%. In vitro herbicide release from microparticles to water was affected by herbicide solubility and PHA chemical composition. The readily soluble MET showed the highest release rate, and over 30 days, 64% and 78% of the encapsulated amounts were released from P(3HB) and P(3HB/3HV) microparticles, respectively. High herbicidal activity of microparticles loaded with metribuzin and tribenuron-methyl was demonstrated in the laboratory stands of the Elsholtzia ciliata weed plant.

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Держатели документа:
Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, Krasnoyarsk, Russia.
Mahatma Gandhi Univ, Int & Inter Univ Ctr Nanosci & Nanotechnol, Kottayam, Kerala, India.
RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, Inst Biophys SB, Krasnoyarsk, Russia.
RAS, Krasnoyarsk Sci Ctr SB, Res Equipment Fed Res Ctr, Krasnoyarsk Reg Ctr, Krasnoyarsk, Russia.
RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, LV Kirensky Inst Phys, Krasnoyarsk, Russia.
Reshetnev Siberian State Univ Sci & Technol, Sci Lab, Krasnoyarsk, Russia.

Доп.точки доступа:
Vijayamma, Raji; Maria, Hanna J.; Thomas, Sabu; Shishatskaya, Ekaterina I.; Kiselev, Evgeniy G.; Nemtsev, Ivan V.; Sukhanova, Anna A.; Volova, Tatiana G.; Project "Agropreparations of the new generation: a strategy of construction and realization" [074-02-2018-328]; Government of the Russian Federation [220]

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