Biodegradable herbicide delivery systems with slow diffusion in soil and UV protection properties

Chevillard, Anne; Angellier‐Coussy, Hélène; Guillard, Valérie; Bertrand, Cédric; Gontard, Nathalie; Gastaldi, Emmanuelle

doi:10.1002/ps.3705

Cited by 17 publications

(6 citation statements)

References 38 publications

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“…One of the approaches to pesticide release rate control is using a variety of polymers with different properties as well as composite materials. As a rule, composites and mixtures including a polymer and a non-organic filling material were used. − ,, In some works, mixtures of two polymers were used as composite matrices. Thus, in the work of Suave et al, insecticide malathion was embedded into microspheres of P3HB/PCL mixed in different proportions (70:30, 80:20, 90:10, 95:5, and 97:3) and it was revealed that adding polycaprolactone into P3HB regulated pesticide release into water, the kinetics of which depended upon the PCL concentration.…”

Section: Discussionmentioning

confidence: 99%

Constructing Slow-Release Formulations of Metribuzin Based on Degradable Poly(3-hydroxybutyrate)

Boyandin

Zhila

Kiselev

et al. 2016

J. Agric. Food Chem.

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Experimental formulations of herbicide metribuzin embedded in matrices of degradable natural polymer poly(3-hydroxybutyrate) (P3HB) and its composites with poly(ethylene glycol) (PEG), poly-ε-caprolactone (PCL), and wood powder have been prepared in the form of pressed pellets containing 75% polymeric basis (pure P3HB or its composite with a second component at a ratio of 7:3) and 25% metribuzin. Incubation of formulations in soil laboratory systems led to the degradation of the matrix and herbicide release. The most active release of metribuzin (about 60% of the embedded herbicide over 35 days) was detected for the P3HB/PEG carrier compared to the P3HB, P3HB/wood, and P3HB/PCL forms (30-40%). Thus, the study shows that herbicide release can be controlled by the matrix formulation. Metribuzin formulations exerted a significant herbicidal effect on the plant Agrostis stolonifera, used as a weed plant model. Application of these long-term formulations will make it possible to reduce environmental release of chemicals, which will restrict the rate of their accumulation in trophic chains of ecosystems and abate their adverse effects on the biosphere.

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Section: Discussionmentioning

confidence: 99%

Constructing Slow-Release Formulations of Metribuzin Based on Degradable Poly(3-hydroxybutyrate)

Boyandin

Zhila

Kiselev

et al. 2016

J. Agric. Food Chem.

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“…A number of studies report loading pesticides (sulfometuron, sulfosulfuron) into matrices of clay blended with didodecyldimethylammonium, composites of mesoporous silica and 2,4‐D sodium salt, clay with layered double hydroxides loaded with 2,4‐D sodium salt, 2‐methyl‐4‐chlorophenoxyacetic acid (MCPA), and picloram . Other authors describe composite systems based on clay and ethyl cellulose nanoparticles, wheat gluten, organic modified and unmodified clays, and a model pesticide ethofumesate, lignin with chloridazon and metribuzin . Composite systems consisting of natural polymers (chitosan, carboxymethyl cellulose) and claylike compounds were used for loading different herbicides as the active ingredient …”

Section: Introductionmentioning

confidence: 99%

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

Kiselev

Boyandin

Zhila

et al. 2019

Pest Management Science

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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

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“…In addition, the water velocity in the water column of the evaluated APs is too low to induce advection of pesticides. (b) Several studies showed that the molecular diffusion of diverse pesticides is too low in the water (~10 -9 m 2 .s -1 at 25°C) (Chevillard et al, 2014;Fernández-Pascual et al, 2020;Sarraute et al, 2019). ( 4) PESTIPOND simulates the fate of pesticides in the first cm of sediments designated as the active sediment layer governing pesticide transformation and transport under flooded conditions.…”

Section: Introductionmentioning

confidence: 99%

PESTIPOND: A descriptive model of pesticide fate in artificial ponds: II. Model application and evaluation

Bahi

Sauvage

Payraudeau

et al. 2023

Ecological Modelling

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Biodegradable herbicide delivery systems with slow diffusion in soil and UV protection properties

Abstract: The use of pesticide formulations based on wheat gluten and nanoclays appeared to be a promising strategy both to reduce the mobility of pesticides in soil and to protect UV-photosensitive pesticides from photodegradation.

Cited by 17 publications

References 38 publications

Constructing Slow-Release Formulations of Metribuzin Based on Degradable Poly(3-hydroxybutyrate)

Constructing Slow-Release Formulations of Metribuzin Based on Degradable Poly(3-hydroxybutyrate)

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

PESTIPOND: A descriptive model of pesticide fate in artificial ponds: II. Model application and evaluation

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