Controlled pesticide release from biodegradable polymers

Roy, Anamika; Singh, Sunil Kumar; Bajpai, Jaya

doi:10.2478/s11532-013-0405-2

Cited by 201 publications

(171 citation statements)

References 141 publications

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“…These results qualify the polymers used, since one of the criteria for the materials used as seed coat film is that they do not react negatively with the chemicals and do not affect the physiological quality (ROY et al, 2014), thereby corroborating the results found by Castañeda et al (2014), Keawkham et al (2014) and Melo et al (2015), where no changes were observed in the physiological potential of rice seeds and other agricultural species when they were treated with phytosanitary and polymer coatings. For soybean seeds, Verma and Verma (2014) considered the benefits of the association and compatibility of the polymer material with the fungicide, resulting in higher percentages of germination.…”

Section: Resultssupporting

confidence: 79%

“…The ability of thiamethoxam to bind to the mineral particles of clay and organic matter through sorption is greater in clayey soils as compared to more sandy soils. Leaching is prevented to a greater extent by the presence of more organic matter (BROZNIĆ et al, 2012;ROY et al, 2014). Avelar et al (2012) observed that maize seeds coated with the PolySeed CF polymer had five times more efficiency in the retention of Furazin 310 TS® insecticide containing 210 g zinc L -1 , used for the treatment of seeds.…”

Section: Resultsmentioning

confidence: 99%

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Rice Seed Treatment and Recoating With Polymers: Physiological Quality and Retention of Chemical Products

et al. 2017

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-The use of chemical seed treatment is an important tool in the protection of seedlings and has contributed to the increase of rice yield (Oryza sativa L.). The objective of this study was to evaluate the physiological quality and quantify the retention of chemical products in rice seeds treated with insecticide and fungicide coated with polymers. Six seed treatments were used: control, phytosanitary treatment and phytosanitary treatment and coating with the polymers, Florite 1127 ® and VermDynaseed ® polymers were efficient at retaining thiamethoxam in the rice seeds, preventing some of the active ingredients of the insecticide from being leached through the sand columns immediately after the simulated pluvial precipitation.

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Rice Seed Treatment and Recoating With Polymers: Physiological Quality and Retention of Chemical Products

et al. 2017

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“…R apid biodegradation of plant-derived substances is advantageous because it leads to less environmental contamination, although it also has disadvantages because it reduces residual activity and creates the need for repeated application of the product (35) (37) (38) (39) (40) . Placing the substance in a CRD may therefore increase the duration of residual activity and protect against degradation (41) .…”

Section: Discussionmentioning

confidence: 99%

A biodegradable device for the controlled release of Piper nigrum (Piperaceae) standardized extract to control Aedes aegypti (Diptera, Culicidae) larvae

Custódio

Oliveira

Moterle

et al. 2016

Rev. Soc. Bras. Med. Trop.

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Introduction:The signifi cant increase in dengue, Zika, and chikungunya and the resistance of the Aedes aegypti mosquito to major insecticides emphasize the importance of studying alternatives to control this vector. The aim of this study was to develop a controlled-release device containing Piper nigrum extract and to study its larvicidal activity against Aedes aegypti. Methods: Piper nigrum extract was produced by maceration, standardized in piperine, and incorporated into cotton threads, which were inserted into hydrogel cylinders manufactured by the extrusion of carrageenan and carob. The piperine content of the extract and thread reservoirs was quantifi ed by chromatography. The release profi le from the device was assessed in aqueous medium and the larvicidal and residual activities of the standardized extract as well as of the controlled-release device were examined in Aedes aegypti larvae. Results: The standardized extract contained 580mg/g of piperine and an LC 50 value of 5.35ppm (24h) and the 3 cm thread reservoirs contained 13.83 ± 1.81mg of piperine. The device showed zero-order release of piperine for 16 days. The P. nigrum extract (25ppm) showed maximum residual larvicidal activity for 10 days, decreasing progressively thereafter. The device had a residual larvicidal activity for up to 37 days. Conclusions: The device provided controlled release of Piper nigrum extract with residual activity for 37 days. The device is easy to manufacture and may represent an effective alternative for the control of Aedes aegypti larvae in small water containers.

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“…These formulations, besides providing the slow-release profile to the pesticide, also increase the water-holding capacity of soil (Roy et al 2014). After their degradation, these are helpful as compost in the field (Kumar et al 2014).…”

Section: Controlled-release Agrochemical Delivery Systems and Their Amentioning

confidence: 99%

“…Due to the direct influence of swelling on the release found for these polymer matrices. The adjustment of the swelling behavior by formulating mixtures with other polymers proves to be an interesting tactic to modify the release of the fertilizer (Roy et al 2014;Zhang et al 2014a). In case of fertilizer chemicals, hydrogels are capable of storing large amounts of fertilizer, gradually releasing it into the soil, retaining the fertilizers concentration longer and in optimal conditions.…”

Section: +3mentioning

confidence: 99%

Polysaccharides as safer release systems for agrochemicals

Campos

Oliveira

Fraceto

et al. 2014

Agron. Sustain. Dev.

278

175

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Agrochemicals are used to improve the production of crops. Conventional formulations of agrochemicals can contaminate the environment, in particular in the case of intensive cropping. Hence, there is a need for controlledrelease formulations of agrochemicals such as polysaccharides to reduce pollution and health hazards. Natural polysaccharides are hydrophilic, biodegradable polymers. This article reviews the use of polysaccharides in the form of micro-and nanoparticles, beads and hydrogels. The main points are: (1) slow release formulations minimize environmental impact by reducing agrochemical leaching, volatilization and degradation. For example, 50 % of the encapsulated insecticide chlorpyrifos is released in 5 days, whereas free chlorpyrifos is released in 1 day. (2) Slow release formulations increase the water-holding capacity of soil. (3) Slow release formulations better control weeds in the long run. (4) Polymer-clay formulations store ionic plant nutrients. (5) Polymer hydrogel formulations reduce compaction, erosion, and water run-off. They increase soil permeability and aeration, infiltration rates, and microbial activity, and, in turn, plant performance. In conclusion, polysaccharide formulations can be used for safer use of agrochemicals.

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Controlled pesticide release from biodegradable polymers

Cited by 201 publications

References 141 publications

Rice Seed Treatment and Recoating With Polymers: Physiological Quality and Retention of Chemical Products

Rice Seed Treatment and Recoating With Polymers: Physiological Quality and Retention of Chemical Products

A biodegradable device for the controlled release of Piper nigrum (Piperaceae) standardized extract to control Aedes aegypti (Diptera, Culicidae) larvae

Polysaccharides as safer release systems for agrochemicals

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