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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vijayamma, Raji, Maria, Hanna J., Thomas, Sabu, Shishatskaya, Ekaterina I., Kiselev, Evgeniy G., Nemtsev, Ivan V., Sukhanova, Anna A., Volova, Tatiana G.
Заглавие : A study of the properties and efficacy of microparticles based on P(3HB) and P(3HB/3HV) loaded with herbicides
Колич.характеристики :13 с
Коллективы : Project "Agropreparations of the new generation: a strategy of construction and realization" [074-02-2018-328]; Government of the Russian Federation [220]
Место публикации : J. Appl. Polym. Sci.: WILEY, 2021. - Ст.e51756. - Article in press. - ISSN 0021-8995, DOI 10.1002/app.51756. - ISSN 1097-4628(eISSN)
Примечания : 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.
Предметные рубрики: FENOXAPROP-P-ETHYL
CONTROLLED-RELEASE
BIODEGRADABLE
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kiselev, Evgeniy G., Boyandin, Anatoly N., Zhila, Natalia O., Prudnikova, Svetlana, V, Shumilova, Anna A., Baranovskiy, Sergey, V, Shishatskaya, Ekaterina, I, Thomas, Sabu, Volova, Tatiana G.
Заглавие : Constructing sustained-release herbicide formulations based on poly-3-hydroxybutyrate and natural materials as a degradable matrix
Колич.характеристики :14 с
Коллективы : Government of the Russian Federation [074-02-2018-328, 220]
Место публикации : Pest Manag. Sci.: JOHN WILEY & SONS LTD. - ISSN 1526-498X, DOI 10.1002/ps.5702. - ISSN 1526-4998(eISSN)
Примечания : Cited References:83. - This study was financially supported by the 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'.
Предметные рубрики: SOIL MICROBIAL COMMUNITY
FENOXAPROP-P-ETHYL
SLOW-RELEASE
METRIBUZIN
Аннотация: 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. (c) 2019 Society of Chemical Industry
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