Preparation, characterization and efficiency of nanoencapsulated imidacloprid under laboratory conditions

Memarizadeh, N; Ghadamyari, Mohammad; Adeli, Mohsen; Talebi, Khalil

doi:10.1016/j.ecoenv.2014.05.009

Cited by 72 publications

(32 citation statements)

References 24 publications

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“…These results could occur because nanoformulation increases the efficiency of insecticides and reduces the dose level required to control due to the small sizes of nanoparticles which makes insecticides more penetrative into leaf tissue and easily reach to target leaf miner. The obtained results are in agreement with the findings of (Ahmed et al, 2020) and (Memarizadeh et al, 2014) who found that mortality percentages of Glyphodes pyloalis's larvae was increased in leaf dip bioassay experiment by nano-imidacloprid with an obvious reduction in insecticide concentration and LC50 decreased to 4.82 and 9.05-fold less than the commercial size of imidacloprid; respectively.…”

Section: Discussionsupporting

confidence: 92%

Does Nano-Neonicotinoids Are More Efficient Than Commercial Sizes Against Leaf Miner, Liriomyza trifolii Burgess (Diptera: Agromyzidae) on Tomato?

Saad¹,

Abdu-Allah²,

El-Din³

et al. 2021

Egyptian Academic Journal of Biological Sciences. A, Entomology

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on tomato variety 765 planted on the 10 th of September for each season in an approximate area (315 m 2 ) in order to compare the efficiency of three Neonicotinoids [Thiamethoxam (Actara 25% WG), Imidacloprid (Best 25% WP ), Acetamiprid (Mospildate 20% SP)] in Nano and commercial formulation size using recommended dose for them and the half-recommended dose for nano-insecticides against tomato leaf miner, Liriomyza trifolii Burgess (Diptera: Agromyzidae). The randomized complete block design (RCBD) was applied with three replicates/ treatment and three control in a total of 21 plots. The replicate (plot) size was 3 ×3.5 m and consists of three rows planted with 5 plants/ row.The nano and commercial insecticide sizes showed highly significant results in reducing the infestations of mines in tomato during the studied seasons in the first and second week after (1 st and 2 nd ) spray compared with control. The nano-thiamethoxam 1x was the best for mines reduction followed by nano-acetamiprid, and nano-imidacloprid. However, there were no significant differences between commercial and nano-formulations in mines reduction % and the highest reductions showed by nano treatments. However, the treated tomato by the halfrecommended rate of nano and commercial formulations showed the same reduction results.

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Section: Discussionsupporting

confidence: 92%

Does Nano-Neonicotinoids Are More Efficient Than Commercial Sizes Against Leaf Miner, Liriomyza trifolii Burgess (Diptera: Agromyzidae) on Tomato?

Saad¹,

Abdu-Allah²,

El-Din³

et al. 2021

Egyptian Academic Journal of Biological Sciences. A, Entomology

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“…Nos últimos anos a tecnologia de liberação controlada/modificada tem ganhado destaque, pois ela emergiu como uma importante alternativa capaz de resolver alguns dos problemas que acompanham o uso de substâncias ativas de interesse em alguns setores, 6 como por exemplo o agrícola (pesticidas e herbicidas), [7][8][9][10][11] alimentício, [12][13] o farmacêutico, [14][15][16][17] e, ineditamente, poderá ser aplicada para os cátions metálicos essenciais às plantas visando o aumento da eficiência dos fertilizantes, ou seja, aumento da disponibilidade destes no solo, minimização dos impactos ambientais e garantia de um desenvolvimento mundial considerado sustentável. Esta tecnologia propicia a liberação dos princípios ativos no decorrer de um determinado tempo através de processos físico-químicos, tais como dessorção e/ou erosão, sendo capaz de permitir a alteração das propriedades físico-químicas dos ativos para a liberação controlada/adequada destes, 6,18 possibilitando a atuação de forma contínua e prolongada dos cátions metálicos.…”

Section: Introductionunclassified

“…Um deles é o cálculo da taxa de encapsulamento dos nutrientes na matriz polimérica, como também a concentração de nutriente que este sistema libera no decorrer de um determinado tempo. [6][7][8][9][10][11][12][13][14][15][16][17][18] Assim, são requeridas técnicas analíticas para a quantificação da concentração dos cátions metálicos nesses processos.…”

Section: Introductionunclassified

Otimização multivariada de metodologia para digestão de micropartículas poliméricas carreadoras de cátions metálicos

et al. 2016

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Recebido em 28/03/2016, aceito em 06/07/2016, publicado na web em 16/08/2016 MULTIVARIATE OPTIMIZATION OF METHODOLOGY FOR POLYMERIC MICROPARTICLE DIGESTION METALLIC CATION CARRIERS. There are not reports in the literature of digestion processes of metallic cation carrier microparticles. Multivariate experimental designs were utilized to ensure an appropriate digestion for further analysis by atomic absorption spectroscopy. It was used a heater plate and the polimeric degradation was evaluated utilizing an analyzer of total organic carbon (TOC). For the total carbon (TC) content, the full factorial design 2 4 pointed the significance of sample volume (V Am ), in relation to the variables acid volume (V Ac ), temperature (T) and digestion time (t). However, according to the normal distribution graph it was noted a possible significance of the T and t effects. The same was observed for TOC, including the V Am × V Ac × T effect suggestive of complex behavior. In the central composite design all variables were again studied and the V AM was significant, promoting a TC decreasing at the lower evaluated level. By ANOVA a quadratic model without lack of fit was found, with the significant quadratic term. The best digestion condition was: 5.00 mL of sample, 10.00 mL of nitric acid, 60 ºC and 90 min. The multivariate optimization allowed an efficient digestion, with the initial carbon concentration of 4.60 mg L -1 decreased to 0.55 mg L -1 .Keywords: metallic cations; polymeric microparticles; sample preparation; digestion; multivariate experimental designs. INTRODUÇÃOOs cátions metálicos são parte essencial dos fertilizantes, pois eles são responsáveis por várias funções nas plantas, que vão desde a participação na síntese de proteínas, até sua presença em enzimas que participam de processos da fotossíntese. 1-2 Fertilizantes ou adubos são compostos químicos inorgânicos ou orgânicos utilizados para propiciar os nutrientes essenciais ao desenvolvimento das plantas, e são aplicados na agricultura para um maior rendimento da produção. 3 No entanto, atualmente, estudos 4-5 demonstram que para a maioria dos fertilizantes usados, parte dos seus nutrientes são perdidos no ambiente, podendo ocasionar uma série de contaminações ambientais. Por exemplo, os fertilizantes que possuem em sua composição nitratos e fosfatos podem perder parte desses compostos em processos de lixiviação, propiciando o processo de eutrofização em águas de mananciais e lençóis freáticos. Ainda, os fertilizantes quando não aplicados de forma correta podem proporcionar desequilíbrios no ecossistema e aumento do número das fontes de toxicidade aguda e carcinogênicas para os seres humanos. [4][5] Desta forma, o uso adequado dos fertilizantes é uma atividade que deve ser levada em consideração, visando à sustentabilidade econômica, ambiental e social do agronegócio mundial.Nos últimos anos a tecnologia de liberação controlada/modificada tem ganhado destaque, pois ela emergiu como uma importante alternativa capaz de resolver alguns dos problemas que acompanham ...

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“…The formulation obtained by direct encapsulation of imidacloprid NPs to linear-dendritic ABA triblock copolymer (A block = poly(citric acid) (PCA); B-block = PEG) showed improved insecticidal efficiency of the pesticide, enabled reduction of the dosage and the frequency of the pesticide use and increased the length of effectiveness [180]. Significant reduction of the essential dosage of the pesticide for pest control was obtained by encapsulation of indoxacarb to above-mentioned linear-dendritic ABA type copolymer with TiO 2 NPs [181].…”

Section: Nanoinsecticidesmentioning

confidence: 99%

Application Of Nanotechnology In Agriculture And Food Industry, Its Prospects And Risks

Jampílek

Kráľová

2015

Ecological Chemistry and Engineering S

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Nanoagrochemicals, such as nanopesticides, nanofertilizers or plant growth stimulating nanosystems, were primarily designed to increase solubility, enhance bioavailability, targeted delivery, controlled release and/or protection against degradation resulting in the reduced amount of applied active ingredients and finally in a decrease of dose-dependent toxicity/burden. This paper is a comprehensive up-to-date review related to the preparation and the biological activity of nanoformulations enabling gradual release of active ingredient into weeds and the body of pests and controlled release of nutrients to plants. The attention is also devoted to the decrease of direct environmental burden and economic benefits due to application of nanoformulations, where less amount of active ingredient is needed to achieve the same biological effect in comparison with bulk. The application of nanotechnology in the areas such as food packaging, food security, encapsulation of nutrients and development of new functional products is analysed. The use of nanoparticles in biosensors for detection of pathogens and contaminants as well as in DNA and gene delivery is discussed as well. Benefits and health risks of nanoagrochemicals are highlighted, and special attention is given to nanoecotoxicology and guidelines and regulatory documents related to the use of nanoformulations in agriculture and food industry.

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Preparation, characterization and efficiency of nanoencapsulated imidacloprid under laboratory conditions

Cited by 72 publications

References 24 publications

Does Nano-Neonicotinoids Are More Efficient Than Commercial Sizes Against Leaf Miner, Liriomyza trifolii Burgess (Diptera: Agromyzidae) on Tomato?

Does Nano-Neonicotinoids Are More Efficient Than Commercial Sizes Against Leaf Miner, Liriomyza trifolii Burgess (Diptera: Agromyzidae) on Tomato?

Otimização multivariada de metodologia para digestão de micropartículas poliméricas carreadoras de cátions metálicos

Application Of Nanotechnology In Agriculture And Food Industry, Its Prospects And Risks

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