| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Meio Ambiente. Para informações adicionais entre em contato com cnpma.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Meio Ambiente. |
|
Data corrente: |
22/11/2022 |
|
Data da última atualização: |
23/11/2022 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
VALLIM, J. H.; CLEMENTE, Z.; CASTANHA, R. F.; PEREIRA, A. do E. S.; CAMPOS, E. V. R.; ASSALIN, M. R.; MAURER-MORELLI, C. V.; FRACETO, L. F.; CASTRO, V. L. S. S. de. |
|
Afiliação: |
JOSE HENRIQUE VALLIM, CNPMA; ZAIRA CLEMENTE; RODRIGO FERNANDES CASTANHA, CNPMA; ANDERSON DO ESPÍRITO SANTO PEREIRA, UNIVERSIDADE ESTADUAL PAULISTA; ESTEFÂNIA VANGELIE RAMOS CAMPOS, UNIVERSIDADE ESTADUAL PAULISTA; MARCIA REGINA ASSALIN, CNPMA; CLÁUDIA VIANNA MAURER-MORELLI, UNIVERSIDADE ESTADUAL DE CAMPINAS; LEONARDO FERNANDES FRACETO, UNIVERSIDADE ESTADUAL PAULISTA; VERA LUCIA SCHERHOLZ S DE CASTRO, CNPMA. |
|
Título: |
Chitosan nanoparticles containing the insecticide dimethoate: a new approach in the reduction of harmful ecotoxicological effects. |
|
Ano de publicação: |
2022 |
|
Fonte/Imprenta: |
NanoImpact, v. 27, article 100408, 2022. |
|
ISSN: |
2452-0748 |
|
DOI: |
https://doi.org/10.1016/j.impact.2022.100408 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Abstract: Organophosphate insecticides such as dimethoate (DMT) are widely used in agriculture. As a side effect, however, these insecticides contaminate bodies of water, resulting in damage to aquatic organisms. The development of nanopesticides may be an innovative alternative in the control of agricultural pests, increasing effectiveness and reducing their toxicological effects. Based upon this, the present study has investigated encapsulated DMT in alginate chitosan nanoparticles (nanoDMT) and evaluated its toxicological effects on non-target organisms. The nanoparticles were characterized by DLS, NTA and AFM, as well as being evaluated by the release profile. Nanoparticle toxicity was also evaluated in comparison with DMT, empty nanoparticles and DMT (NP + DMT), and commercial formulations (cDMT), in the embryos and larvae of Danio rerio (zebrafish) according to lethality, morphology, and behavior. The nanoparticle control (NP) showed hydrodynamic size values of 283 ± 4 nm, a PDI of 0.5 ± 0.05 and a zeta potential of -31 ± 0.4 mV. For nanoparticles containing dimethoate, the nanoparticles showed 301 ± 7 nm size values, a PDI of 0.45 ± 0.02, a zeta potential of -27.9 ± 0.2 mV, and an encapsulation of 75 ± 0.32%, with slow-release overtime (52% after 48 h). The AFM images showed that both types of nanoparticles showed spherical morphology. Major toxic effects on embryo larval development were observed in commercial dimethoate exposure followed by the technical pesticide, predominantly in the highest tested concentrations. With regard to the toxic effects of sodium alginate/chitosan, although there was an increase for LC50?96 h concerning the technical dimethoate, the behavior of the larvae was not affected. The data obtained demonstrate that nanoencapsulated dimethoate reduces the toxicity of insecticides on zebrafish larvae, suggesting that nanoencapsulation may be safer for non-target species, by eliminating collateral effects and thus promoting sustainable agriculture. MenosAbstract: Organophosphate insecticides such as dimethoate (DMT) are widely used in agriculture. As a side effect, however, these insecticides contaminate bodies of water, resulting in damage to aquatic organisms. The development of nanopesticides may be an innovative alternative in the control of agricultural pests, increasing effectiveness and reducing their toxicological effects. Based upon this, the present study has investigated encapsulated DMT in alginate chitosan nanoparticles (nanoDMT) and evaluated its toxicological effects on non-target organisms. The nanoparticles were characterized by DLS, NTA and AFM, as well as being evaluated by the release profile. Nanoparticle toxicity was also evaluated in comparison with DMT, empty nanoparticles and DMT (NP + DMT), and commercial formulations (cDMT), in the embryos and larvae of Danio rerio (zebrafish) according to lethality, morphology, and behavior. The nanoparticle control (NP) showed hydrodynamic size values of 283 ± 4 nm, a PDI of 0.5 ± 0.05 and a zeta potential of -31 ± 0.4 mV. For nanoparticles containing dimethoate, the nanoparticles showed 301 ± 7 nm size values, a PDI of 0.45 ± 0.02, a zeta potential of -27.9 ± 0.2 mV, and an encapsulation of 75 ± 0.32%, with slow-release overtime (52% after 48 h). The AFM images showed that both types of nanoparticles showed spherical morphology. Major toxic effects on embryo larval development were observed in commercial dimethoate exposure followed by the technical pesticide, ... Mostrar Tudo |
|
Thesagro: |
Impacto Ambiental; Inseticida; Peixe de Água Doce; Toxidez. |
|
Thesaurus Nal: |
Danio rerio; Dimethoate; Ecotoxicology; Encapsulation; Environmental impact; Nanocapsules; Toxicity. |
|
Categoria do assunto: |
H Saúde e Patologia |
|
Marc: |
LEADER 03122naa a2200373 a 4500
001 2148599
005 2022-11-23
008 2022 bl uuuu u00u1 u #d
022 $a2452-0748
024 7 $ahttps://doi.org/10.1016/j.impact.2022.100408$2DOI
100 1 $aVALLIM, J. H.
245 $aChitosan nanoparticles containing the insecticide dimethoate$ba new approach in the reduction of harmful ecotoxicological effects.$h[electronic resource]
260 $c2022
520 $aAbstract: Organophosphate insecticides such as dimethoate (DMT) are widely used in agriculture. As a side effect, however, these insecticides contaminate bodies of water, resulting in damage to aquatic organisms. The development of nanopesticides may be an innovative alternative in the control of agricultural pests, increasing effectiveness and reducing their toxicological effects. Based upon this, the present study has investigated encapsulated DMT in alginate chitosan nanoparticles (nanoDMT) and evaluated its toxicological effects on non-target organisms. The nanoparticles were characterized by DLS, NTA and AFM, as well as being evaluated by the release profile. Nanoparticle toxicity was also evaluated in comparison with DMT, empty nanoparticles and DMT (NP + DMT), and commercial formulations (cDMT), in the embryos and larvae of Danio rerio (zebrafish) according to lethality, morphology, and behavior. The nanoparticle control (NP) showed hydrodynamic size values of 283 ± 4 nm, a PDI of 0.5 ± 0.05 and a zeta potential of -31 ± 0.4 mV. For nanoparticles containing dimethoate, the nanoparticles showed 301 ± 7 nm size values, a PDI of 0.45 ± 0.02, a zeta potential of -27.9 ± 0.2 mV, and an encapsulation of 75 ± 0.32%, with slow-release overtime (52% after 48 h). The AFM images showed that both types of nanoparticles showed spherical morphology. Major toxic effects on embryo larval development were observed in commercial dimethoate exposure followed by the technical pesticide, predominantly in the highest tested concentrations. With regard to the toxic effects of sodium alginate/chitosan, although there was an increase for LC50?96 h concerning the technical dimethoate, the behavior of the larvae was not affected. The data obtained demonstrate that nanoencapsulated dimethoate reduces the toxicity of insecticides on zebrafish larvae, suggesting that nanoencapsulation may be safer for non-target species, by eliminating collateral effects and thus promoting sustainable agriculture.
650 $aDanio rerio
650 $aDimethoate
650 $aEcotoxicology
650 $aEncapsulation
650 $aEnvironmental impact
650 $aNanocapsules
650 $aToxicity
650 $aImpacto Ambiental
650 $aInseticida
650 $aPeixe de Água Doce
650 $aToxidez
700 1 $aCLEMENTE, Z.
700 1 $aCASTANHA, R. F.
700 1 $aPEREIRA, A. do E. S.
700 1 $aCAMPOS, E. V. R.
700 1 $aASSALIN, M. R.
700 1 $aMAURER-MORELLI, C. V.
700 1 $aFRACETO, L. F.
700 1 $aCASTRO, V. L. S. S. de
773 $tNanoImpact$gv. 27, article 100408, 2022.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Meio Ambiente (CNPMA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Acre. |
|
Data corrente: |
17/01/2000 |
|
Data da última atualização: |
09/03/2023 |
|
Autoria: |
THOMAZINI, M. J. |
|
Afiliação: |
MARCILIO JOSE THOMAZINI, CPAF-AC. |
|
Título: |
Broca-dos-frutos do cupuaçuzeiro em sistemas agroflorestais do Projeto Reca em Nova Califórnia, RO. |
|
Ano de publicação: |
1998 |
|
Fonte/Imprenta: |
Rio Branco, AC: Embrapa CPAF-AC, 1998. |
|
Páginas: |
3 p. |
|
Série: |
(Embrapa CPAF-AC. Pesquisa em andamento, 126). |
|
ISSN: |
0101-6075 |
|
Idioma: |
Português |
|
Conteúdo: |
Os sistemas agroflorestais (SAF's) são considerados como uma das alternativas mais promissoras a agricultura itinerante que derruba e queima praticada na Amazônia. No entanto, a sustentabilidade desses sistemas esta sendo ameaçada pela incidência de pragas, dente estas a broca-dos-frutos do cupuaçuzeiro, Conotrachelus sp. (Coleoptera Curculionidae). A base para o manejo adequado deste inseto será fornecida pelos resultados das interações da praga com a cultura e o ambiente, tornando a agrossilvicultura, uma atividade rentável e proporcionando um resultado final de melhoria a qualidade de vida do homem do campo. Baseado nisto, algumas ações foram iniciadas a partir de fevereiro de 1998, visando determinar a dinâmica populacional da praga, quantificar as perdas causadas, identificas as espécies da broca e os possíveis hospedeiros alternativos. Os experimentos foram instalados em duas áreas de agrossilvicultores associados ao projeto RECA e nessas áreas os SAF's são compostos de cupuaçu, pupunha e castanha. |
|
Palavras-Chave: |
Agroflorestal; Agroforestería; Agrosilvicultura; Amazonia Occidental; Amazônia Ocidental; Castanha do brasil; Controle; Dinámica poblacional; Nova Califórnia (RO); Peach palm; Plagas de plantas; Projeto Reca; Rondonia; Sistema agroflorestal (SAF); Western Amazon. |
|
Thesagro: |
Bactris Gasipaes; Bertholletia Excelsa; Broca; Broca do Fruto; Castanha do Para; Cupuaçu; Dinâmica Populacional; Praga; Praga de Planta; Pupunha; Theobroma Grandiflorum. |
|
Thesaurus NAL: |
Agroforestry; Brazil nuts; Conotrachelus; Curculionidae; pests; Plant pests; Population dynamics. |
|
Categoria do assunto: |
--
O Insetos e Entomologia |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAF-AC-2010/5870/1/pesquisa126.pdf
|
|
Marc: |
LEADER 02524nam a2200541 a 4500
001 1497172
005 2023-03-09
008 1998 bl uuuu u0uu1 u #d
022 $a0101-6075
100 1 $aTHOMAZINI, M. J.
245 $aBroca-dos-frutos do cupuaçuzeiro em sistemas agroflorestais do Projeto Reca em Nova Califórnia, RO.
260 $aRio Branco, AC: Embrapa CPAF-AC$c1998
300 $a3 p.
490 $a(Embrapa CPAF-AC. Pesquisa em andamento, 126).
520 $aOs sistemas agroflorestais (SAF's) são considerados como uma das alternativas mais promissoras a agricultura itinerante que derruba e queima praticada na Amazônia. No entanto, a sustentabilidade desses sistemas esta sendo ameaçada pela incidência de pragas, dente estas a broca-dos-frutos do cupuaçuzeiro, Conotrachelus sp. (Coleoptera Curculionidae). A base para o manejo adequado deste inseto será fornecida pelos resultados das interações da praga com a cultura e o ambiente, tornando a agrossilvicultura, uma atividade rentável e proporcionando um resultado final de melhoria a qualidade de vida do homem do campo. Baseado nisto, algumas ações foram iniciadas a partir de fevereiro de 1998, visando determinar a dinâmica populacional da praga, quantificar as perdas causadas, identificas as espécies da broca e os possíveis hospedeiros alternativos. Os experimentos foram instalados em duas áreas de agrossilvicultores associados ao projeto RECA e nessas áreas os SAF's são compostos de cupuaçu, pupunha e castanha.
650 $aAgroforestry
650 $aBrazil nuts
650 $aConotrachelus
650 $aCurculionidae
650 $apests
650 $aPlant pests
650 $aPopulation dynamics
650 $aBactris Gasipaes
650 $aBertholletia Excelsa
650 $aBroca
650 $aBroca do Fruto
650 $aCastanha do Para
650 $aCupuaçu
650 $aDinâmica Populacional
650 $aPraga
650 $aPraga de Planta
650 $aPupunha
650 $aTheobroma Grandiflorum
653 $aAgroflorestal
653 $aAgroforestería
653 $aAgrosilvicultura
653 $aAmazonia Occidental
653 $aAmazônia Ocidental
653 $aCastanha do brasil
653 $aControle
653 $aDinámica poblacional
653 $aNova Califórnia (RO)
653 $aPeach palm
653 $aPlagas de plantas
653 $aProjeto Reca
653 $aRondonia
653 $aSistema agroflorestal (SAF)
653 $aWestern Amazon
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Acre (CPAF-AC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
