Polymeric Nanoparticle-Based Insecticides: A Controlled Release Purpose for Agrochemicals

Perlatti, Bruno; Bergo, Patrícia Luísa de Souza; Silva, Maria Fátima das Graças Fernandes da; Fernandes, João B.; Forim, Moacir Rossi

doi:10.5772/53355

Cited by 98 publications

(84 citation statements)

References 94 publications

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“…The use of nanotechnology in agriculture has been studied in recent years, including the development of controlled-release formulations of insecticides by polymeric encapsulation (Perlatti et al, 2013;Das et al, 2014). There are some studies concerning botanical insecticides encapsulated using micro and nanoparticle systems (Oliveira et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of neem-based nanoformulations as alternative to control fall armyworm

2016

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Neem (Azadirachta indica A. Juss.) based insecticides are efficient for the control of various pest species, but their low residual effect and the lack of standardized formulations are problems for field use. Nanoformulations of neem in colloidal suspension or powder, containing the polymers poly (ε-caprolactone) (PCL), poly (β-hidroxibutirate) (PHB) or poly (methyl methacrylate) (PMMA), in capsules or spheres, were developed in order to reduce biodegradation of the active neem compounds and improve their residual effect. Corn leaves treated with the nanoformulations were offered to first instar larvae of fall armyworm during 10 days, observing mortality and larval weight and comparing it to a commercial neem oil and negative controls. The residual effect of the four most efficient nanoformulations was evaluated at 1, 3 and 7 days after spraying (DAS). Feeding preference tests with dual-choice (treatment vs. control) were performed with corn leaf disks at 1, 3 and 7 after DAS, and a preference index was determined 24 hours after larvae feeding on the disks. Some nanoformulations caused mortality up to 3 DAS and sublethal effects up to 7 DAS, but none outperformed the residual effect of commercial neem oil. All treatments showed phagodeterrence at 1 DAS, but this was lost over time. The short duration of the nanoformulations' efficacy suggests that there was little or no release of neem by the nanoparticles, so more studies are needed to improve the release kinetics of the nanoformulated products.Index terms: Azadirachta indica; Spodoptera frugiperda; polymeric nanoparticles; controlled-release formulations. RESUMOInseticidas à base de nim (Azadirachta indica A. Juss.) são eficientes para controle de várias espécies de pragas, porém o baixo efeito residual e a falta de padronização das formulações são um problema para uso em campo. Nanoformulações de nim em suspensão coloidal e em pó, contendo os polímeros poli-ε-caprolactona (PCL), poli-β-hidroxibutirato (PHB) e polimetilmetacrilato (PMMA) em cápsulas ou esferas, foram desenvolvidas, a fim de reduzir a biodegradação dos compostos ativos e melhorar seu efeito residual. Folhas de milho tratadas com as nanoformulações foram oferecidas a lagartas de primeiro ínstar de lagarta do cartucho durante 10 dias, observando-se a mortalidade e o peso larval e comparando com um óleo comercial de nim e controles negativos. O efeito residual das quatro nanoformulações mais eficientes foi avaliado aos 1, 3 e 7 dias, após a pulverização (DAP). Testes de preferência alimentar com dupla escolha (tratamento vs. controle) foram realizados com discos de folhas de milho aos 1, 3 e 7 DAP, e um índice de preferência foi determinado 24 horas após as lagartas se alimentarem nos discos foliares. Algumas nanoformulações causaram mortalidade até 3 DAP e efeitos subletais até 7 DAP, mas nenhuma superou o efeito residual do óleo comercial de nim. Todos os tratamentos apresentaram fagodeterrência em 1 DAP, mas esta foi perdida ao longo do tempo. A curta duração da eficiência das nanoformu...

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Section: Introductionmentioning

confidence: 99%

Evaluation of neem-based nanoformulations as alternative to control fall armyworm

2016

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“…Untuk meningkatkan kandungan bahan aktif daun encok dapat dilakukan dengan sentuhan teknologi nano. Teknologi nano memiliki beberapa kelebihan, antara lain dapat meningkatkan efektivitas dan stabilitas suatu bahan aktif pada tanaman (Gogos et al 2012;Scott dan Chen 2012;Perlatti et al 2013). Oleh karena itu, peluang investasi maupun pengembangan pestisida nabati, terutama dari ekstrak daun encok, sangat prospektif.…”

Section: Peluang Pengembanganunclassified

POTENSI DAN PROSPEK DAUN ENCOK (Plumbago zeylanica L.) SEBAGAI BAHAN AKTIF PESTISIDA NABATI

Rohimatun¹,

Wiratno²

2016

J. Litbang Pert.

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ABSTRAKDaun encok (Plumbago zeylanica L.) merupakan tanaman obat yang juga dapat digunakan sebagai bahan aktif pestisida nabati. Plumbagin merupakan salah satu senyawa sekunder penting yang terkandung dalam tanaman ini dan dapat digunakan sebagai bahan aktif insektisida (Brontispa longgissima), akarisida (Amblyomma variegatum), leismanisida (Tripanosoma protozoa dan Leishmania donovani), nematisida (Aphelenchoides besseyi dan Meloidogyne incognita), fungisida (Aspergillus sp. dan Fusarium sp.), dan bakterisida (Staphylococcus, Streptococcus, Pneumococcus spp., Salmonella dan lainnya). Keefektifan senyawa sekunder daun encok sebagai bahan aktif pestisida nabati belum dipahami secara lengkap sehingga perlu diteliti agar dapat menjadi acuan bagi peneliti dan petani pengguna. Pemanfaatan daun encok sebagai bahan baku pestisida nabati diharapkan dapat menekan penggunaan pestisida kimia sintetis yang cenderung berlebihan sekaligus menciptakan keseimbangan ekologi secara berkelanjutan. Tanaman daun encok dapat diperbanyak dengan menggunakan setek dan kultur jaringan. Pemanfaatan bahan nabati, khususnya daun encok, sebagai pestisida nabati akan mengurangi ketergantungan petani pada bahan kimia sintetis sehingga dapat menghasilkan produk yang lebih berdaya saing, ramah lingkungan, dan aman bagi kesehatan. PENDAHULUAN Populasi organisme pengganggu tanaman (OPT) dalam sistem budi daya tanaman perlu dikendalikan secara berkelanjutan agar dampak serangannya dapat ditekan pada tingkat yang tidak merugikan secara ekonomi. Tindakan pengendalian OPT sering kali membutuhkan biaya besar. Sebagai contoh, biaya pembelian pestisida untuk mengendalikan serangan OPT pada tanaman hortikultura dapat mencapai 3040% dari total biaya produksi (Kardinan 2010). Hal ini karena petani menggunakan pestisida dengan dosis yang berlebihan. Penggunaan pestisida sintetis juga meninggalkan residu di dalam tanah maupun tanaman serta dapat menyebabkan keracunan bagi petani dan konsumen.Untuk menekan biaya pengendalian OPT dan mengurangi dampak negatif penggunaan pestisida sintetis, petani diharapkan mampu memproduksi sendiri formula pestisida nabati yang bahan aktifnya banyak tersedia di sekitar kebunnya. Jenis-jenis tanaman yang telah diketahui efektif mengendalikan hama pertanian antara lain adalah pyrethrum untuk mengendalikan hama gudang (Biebel et al. 2003; Athanassiou dan Kavallieratos

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“…Future research must target ways of circumventing the risk factors associated with nanoparticle usage, because currently comprehensive knowledge of risk assessment factors and further toxicity of nanoparticles towards agroecosystem components after their release into the environment is lacking [25]. Overall, nanobiotechnology seems promising in the direction of formulations that can be used to improve the stability and effectiveness of natural products [26,27]. Such formulations can provide controlled release of the molecules at the site of action, can minimize potential toxic effects on non-target organisms, and can prevent degradation of the active agent by microorganisms [27][28][29].…”

Section: Nanotechnologymentioning

confidence: 99%

“…Overall, nanobiotechnology seems promising in the direction of formulations that can be used to improve the stability and effectiveness of natural products [26,27]. Such formulations can provide controlled release of the molecules at the site of action, can minimize potential toxic effects on non-target organisms, and can prevent degradation of the active agent by microorganisms [27][28][29]. While there is certainly industrial activity aimed in this direction, the technology is still far from proven, with major questions persisting around release rates, storage stability, and cost effectiveness.…”

Section: Nanotechnologymentioning

confidence: 99%

Current Status and Recent Developments in Biopesticide Use

2018

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Abstract:Biopesticides have attracted attention in pest management in recent decades, and have long been promoted as prospective alternatives to synthetic pesticides. Biopesticides have also attracted great interest in the international research community, with a significant increase in the number of publications devoted to the subject. Recently, new substances, like strains of the fungus Talaromyces flavus SAY-Y-94-01, extracts of the plant Clitoria ternatea (butterfly pea), products of the fungus Trichoderma harzianum, products of the bacterium Bacillus thuringiensis var. tenebrionis strain Xd3 (Btt-Xd3), the alkaloid compound oxymatrine, fermentation products of the bacterium Lactobacillus casei strain LPT-111, stilbenes accumulated in grape canes, and olive mill wastes, have been reported in the literature as promising compounds for use as biopesticides, but more field research is required to assess the effects on specific pest problems under diverse cropping systems. Nevertheless, biopesticides have not yet reached the desired level of use, whereby they could displace the dominance of chemical pesticides, given that the commercialization of new products in the market is lagging behind. Currently, biopesticides comprise a small share of the total crop protection market globally, with a value of about $3 billion worldwide, accounting for just 5% of the total crop protection market. Fewer biopesticide-active substances are registered in the European Union (EU) than in the United States, India, Brazil, or China, due to long and complex registration processes in the EU, which follow the model for the registration of conventional pesticides. Nanoformulations and microencapsulation technologies can improve the stability and residual action of biopesticide products, and this could increase their field use. Regulations that promote registration of low-risk compounds with the provision of incentives could also facilitate commercialization and availability of biopesticides in the market.

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Polymeric Nanoparticle-Based Insecticides: A Controlled Release Purpose for Agrochemicals

Cited by 98 publications

References 94 publications

Evaluation of neem-based nanoformulations as alternative to control fall armyworm

Evaluation of neem-based nanoformulations as alternative to control fall armyworm

POTENSI DAN PROSPEK DAUN ENCOK (Plumbago zeylanica L.) SEBAGAI BAHAN AKTIF PESTISIDA NABATI

Current Status and Recent Developments in Biopesticide Use

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