Base de dados : MEDLINE
Pesquisa : J01.040.237 [Categoria DeCS]
Referências encontradas : 53 [refinar]
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[PMID]:29388537
[Au] Autor:Carreira A; Ferreira JB; Pereira I; Ferreira J; Filipe P; Ferreira RB; Monteiro S
[Ad] Endereço:1​CEV, SA, Parque Industrial de Cantanhede/Biocant-Park, lote 120, 3060-197 Cantanhede, Portugal.
[Ti] Título:Blad-containing oligomer: a novel fungicide used in crop protection as an alternative treatment for tinea pedis and tinea versicolor.
[So] Source:J Med Microbiol;67(2):198-207, 2018 Feb.
[Is] ISSN:1473-5644
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:PURPOSE: The lack of novel antifungal drugs and the increasing incidence and severity of fungal infections are major concerns worldwide. Herein, we tested the activity of the Blad-containing oligomer (BCO), a new antifungal molecule already in use for agriculture, on Malassezia spp. and dermatophytes, the causal agents of human tinea versicolor and tinea pedis. Given the lack of a standard method for Malassezia susceptibility testing and the plethora of published methods, we also developed an improved method for this genus. METHODOLOGY: The efficacy of BCO was assessed in vitro and compared to that of the drugs currently utilized in the treatment of tinea versicolor (fluconazole and itraconazole) and tinea pedis (itraconazole and terbinafine). For dermatophytes, the standard microdilution broth-based method was used, with small adjustments, and several broth formulations and inocula sizes were tested to develop an improved susceptibility method for Malassezia spp. RESULTS: We successfully developed a microdilution broth-based method with considerable advantages over other available methods, and used it for all in vitro susceptibility tests of Malassezia spp. isolates. We report that, on a molar basis, BCO was more effective than fluconazole or itraconazole on most strains of Malassezia spp. isolated from clinical samples (n=29). By contrast, BCO was less effective than itraconazole or terbinafine on the common dermatophytes Trichophyton rubrum and Trichophyton interdigitale. CONCLUSION: These data place BCO as a promising drug for the treatment of Malassezia-associated skin diseases. Further in vivo studies are now required to ascertain its applicability in the clinical setting.
[Mh] Termos MeSH primário: Antifúngicos/farmacologia
Arthrodermataceae/efeitos dos fármacos
Fungicidas Industriais/farmacologia
Malassezia/efeitos dos fármacos
Tinha dos Pés/tratamento farmacológico
Tinha Versicolor/tratamento farmacológico
[Mh] Termos MeSH secundário: Antifúngicos/uso terapêutico
Proteção de Cultivos
Descoberta de Drogas
Fluconazol/farmacologia
Fungicidas Industriais/uso terapêutico
Seres Humanos
Itraconazol/farmacologia
Testes de Sensibilidade Microbiana
Tinha dos Pés/microbiologia
Tinha Versicolor/microbiologia
Trichophyton/efeitos dos fármacos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antifungal Agents); 0 (Fungicides, Industrial); 304NUG5GF4 (Itraconazole); 8VZV102JFY (Fluconazole)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180206
[Lr] Data última revisão:
180206
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180202
[St] Status:MEDLINE
[do] DOI:10.1099/jmm.0.000675


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[PMID]:28711800
[Au] Autor:Thomas PK; Dunn GP; Passero M; Feris KP
[Ad] Endereço:Department of Biological Sciences, Boise State University, Boise, ID, USA; School of Natural Resources and Environment, University of Michigan, Ann Arbor, MI, USA.
[Ti] Título:Free ammonia offers algal crop protection from predators in dairy wastewater and ammonium-rich media.
[So] Source:Bioresour Technol;243:724-730, 2017 Nov.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Cost-effective methods for protecting crops from grazing organisms like rotifers are needed to reduce the risk of pond crashes in mass algal cultures. We present a novel strategy to optimize the exposure time to free ammonia, via control of media pH, in both defined media and dairy anaerobic digester effluent to suppress rotifers and maintain algal productivity. We tested five different free ammonia exposure times (0, 1, 2, 6, and 12h) and found a significant nonlinear effect of exposure time (p<0.0001) but not pH (p>0.9) on rotifer survival. In both media types, 6-12h of elevated free ammonia significantly reduced Brachionus plicatilis rotifer survival with no negative effects on Nannochloropsis oculata, while shorter exposure times were insufficient to inhibit rotifers, leading to severe algal culture crashes. These results suggest that algal crops can be protected from rotifers, without productivity loss, by elevating free ammonia for 6 or more hours.
[Mh] Termos MeSH primário: Amônia
Proteção de Cultivos
Águas Residuais
[Mh] Termos MeSH secundário: Compostos de Amônio
Animais
Rotíferos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ammonium Compounds); 0 (Waste Water); 7664-41-7 (Ammonia)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171023
[Lr] Data última revisão:
171023
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170717
[St] Status:MEDLINE


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[PMID]:28658277
[Au] Autor:Liu Y; Gao Y; Liang G; Lu Y
[Ad] Endereço:State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, P. R. China.
[Ti] Título:Chlorantraniliprole as a candidate pesticide used in combination with the attracticides for lepidopteran moths.
[So] Source:PLoS One;12(6):e0180255, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Methomyl is currently used as a toxicant for the attracticide BioAttract in cotton and vegetables in China. However, methomyl is highly toxic to non-target organisms and a more environmental friendly acceptable alternative is required. Larvae of three lepidopteran insects Helicoverpa armigera, Agrotis ipsilon and Spodoptera litura are important pests of these crops in China. In the present study, the toxicity of 23 commonly used insecticides were tested on H. armigera, then tested the susceptibility of A. ipsilon and S. litura moths to the insecticides which were the most toxic to H. armigera, and the acute toxicity of the most efficacious insecticides were further investigated under laboratory conditions. Chlorantraniliprole, emamectin benzoate, spinetoram, spinosad and methomyl exhibited high levels of toxicity to H. armigera moths with a mortality of 86.67%, 91.11%, 73.33%, 57.78% and 80.00%, respectively, during 24 h period at the concentration of 1 mg a.i. L-1. Among these five insecticides, A. ipsilon and S. litura moths were more sensitive to chlorantraniliprole, emamectin benzoate and methomyl. The lethal time (LT50) values of chlorantraniliprole and methomyl were shorter than emamectin benzoate for all three lepidopteran moth species at 1000 mg a.i. L-1 compared to concentrations of 500, 100 and 1 mg a.i L-1. Chlorantraniliprole was found to have similar levels of toxicity and lethal time on the three lepidopteran moths tested to the standard methomyl, and therefore, can be used as an alternative insecticide to methomyl in the attracticide for controlling these pest species.
[Mh] Termos MeSH primário: Controle de Insetos/métodos
Mariposas
Praguicidas
ortoaminobenzoatos
[Mh] Termos MeSH secundário: Animais
Bioensaio
Proteção de Cultivos/métodos
Combinação de Medicamentos
Feminino
Ivermectina/análogos & derivados
Ivermectina/toxicidade
Larva
Macrolídeos/toxicidade
Masculino
Metomil/toxicidade
Praguicidas/toxicidade
ortoaminobenzoatos/toxicidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Drug Combinations); 0 (Macrolides); 0 (Pesticides); 0 (ortho-Aminobenzoates); 1NQ08HN02S (Methomyl); 622AK9DH9G (chlorantranilipole); 70288-86-7 (Ivermectin); HVM3G4A01W (emamectin benzoate); XPA88EAP6V (spinosad); YGZ1037ELN (spinetoram)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170629
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0180255


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[PMID]:28646436
[Au] Autor:Podbielska M; Szpyrka E; Piechowicz B; Zwolak A; Sadlo S
[Ad] Endereço:Department of Ecotoxicology, Institute of Applied Biotechnology, University of Rzeszów, Pigonia 1, 35-310, Rzeszów, Poland. magdapodbiel@gmail.com.
[Ti] Título:Behavior of fluopyram and tebuconazole and some selected pesticides in ripe apples and consumer exposure assessment in the applied crop protection framework.
[So] Source:Environ Monit Assess;189(7):350, 2017 Jul.
[Is] ISSN:1573-2959
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The supervised field trials were conducted in a commercial apple orchard in 2016. The trials were an attempt to determine a model for dissipation and toxicological evaluation of fluopyram, tebuconazole, captan, tetrahydrophthalimide (THPI), pirimicarb, spirodiclofen, and boscalid residues detected in fruit of Red Jonaprince, Lobo, and Gala varieties immediately before harvest. The analysis also covered amounts of pesticides still present in remnants of calyx in Lobo and Gala varieties immediately before harvest. Laboratory samples of ripe apples were collected within 14 days of the treatment. Levels of pesticide residues detected in the samples changed at a constant exponential rate, and the residue levels found in ripe apples of Red Jonaprince, Gala, and Lobo varieties immediately before harvest were below maximum residue levels (MRL). Overall, captan residues in remnants of calyx were at a level of 22.3% for the Gala variety and 9.3% for the Lobo variety. Likewise, the long-term daily intake of the detected substances by a Polish adult consumer was low, ranging from 0.02% ADI for pirimicarb to 0.72% ADI for captan.
[Mh] Termos MeSH primário: Benzamidas/análise
Contaminação de Alimentos/estatística & dados numéricos
Malus/química
Resíduos de Praguicidas/análise
Piridinas/análise
Triazóis/análise
[Mh] Termos MeSH secundário: Captana
Proteção de Cultivos/métodos
Monitoramento Ambiental
Contaminação de Alimentos/análise
Frutas/química
Seres Humanos
Praguicidas/análise
Ftalimidas
Polônia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Benzamides); 0 (Pesticide Residues); 0 (Pesticides); 0 (Phthalimides); 0 (Pyridines); 0 (Triazoles); 27813-21-4 (tetrahydrophthalimide); 401ATW8TRW (tebuconazole); EOL5G26Q9F (Captan); F0VT7K5302 (N-(2-(3-chloro-5-(trifluoromethyl)-2-pyridyl)ethyl)-alpha,alpha,alpha-trifluoro-o-toluamide)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170914
[Lr] Data última revisão:
170914
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170625
[St] Status:MEDLINE
[do] DOI:10.1007/s10661-017-6057-5


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[PMID]:28334362
[Au] Autor:Rice KB; Short BD; Leskey TC
[Ad] Endereço:USDA-ARS, Appalachian Fruit Research Station, 2217 Wiltshire Road, Kearneysville, WV 25430 2771 (ricekevinb@gmail.com; brent.short@ars.usda.gov; tracy.leskey@ars.usda.gov).
[Ti] Título:Development of an Attract-and-Kill Strategy for Drosophila suzukii (Diptera: Drosophilidae): Evaluation of Attracticidal Spheres Under Laboratory and Field Conditions.
[So] Source:J Econ Entomol;110(2):535-542, 2017 Apr 01.
[Is] ISSN:1938-291X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Drosophila suzukii Matsumura (Diptera: Drosophilidae) is an invasive, polyphagous fruit fly that attacks soft-skinned fruits. Originally from Asia, D. suzukii has successfully invaded the United States and the European and South American countries. At present, calendar-based insecticide applications are used to combat D. suzukii. Here, we evaluate a behaviorally based attract-and-kill management technique using attracticidal spheres to reduce D. suzukii infestations in raspberries. In laboratory bioassays aimed at identifying effective toxicants, attracticidal spheres containing dinotefuran at 1.0% a.i. killed 100% of D. suzukii within 5 min. Spinetoram, spinosad, permethrin, lambda-cyhalothrin (CS) and lambda-cyhalothrin (WG), all at 1.0% a.i., killed 100% of D. suzukii within 24 h. In field trials, statistically equivalent infestation rates were recorded in raspberry plots protected by attracticidal spheres containing 1.0% a.i. spinetoram compared with standard weekly insecticide applications. In field trials using 1.0% a.i. dinotefuran, attracticidal spheres decreased D. suzukii infestations compared with control plots, but insecticide applications were more effective at reducing D. suzukii infestations, although differences in harvesting practices likely affected fly population densities and infestation rates in both years. Attracticidal spheres effectively attract and kill D. suzukii and reduce infestations rates under field conditions, indicating that this behavioral strategy holds promise in D. suzukii management.
[Mh] Termos MeSH primário: Proteção de Cultivos/métodos
Drosophila/efeitos dos fármacos
Inseticidas/farmacologia
[Mh] Termos MeSH secundário: Animais
Proteção de Cultivos/instrumentação
Combinação de Medicamentos
Guanidinas/farmacologia
Controle de Insetos/métodos
Macrolídeos/farmacologia
Neonicotinoides
Nitrocompostos/farmacologia
Rubus
West Virginia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Drug Combinations); 0 (Guanidines); 0 (Insecticides); 0 (Macrolides); 0 (Neonicotinoids); 0 (Nitro Compounds); 1W509710WF (dinotefuran); XPA88EAP6V (spinosad); YGZ1037ELN (spinetoram)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170324
[St] Status:MEDLINE
[do] DOI:10.1093/jee/tow319


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[PMID]:28334350
[Au] Autor:George A; Rao CN; Ghike S; Dhengre V
[Ad] Endereço:Scientist, Entomology, ICAR-Central Citrus Research Institute, Nagpur 440033, Maharashtra, India (anjithakitty@gmail.com).
[Ti] Título:Relative Susceptibility of Phyllocnistis citrella (Lepidoptera: Gracillariidae) to Commonly Used Insecticides in Maharashtra, India.
[So] Source:J Econ Entomol;110(2):525-529, 2017 Apr 01.
[Is] ISSN:1938-291X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Foliar application of insecticides has been the most commonly followed practice to manage Phyllocnistis citrella Stainton in nurseries and flush leaves in citrus groves. Leaf dip bioassays were conducted against insecticides, viz., acephate 75SP, dimethoate 30EC, abamectin 1.9EC, fenvalerate 20EC, imidacloprid 17.8SL, and thiamethoxam 25WG, and were tested against P. citrella larvae for their susceptibility. Among six insecticides tested on second-instar P. citrella larvae collected from Nagpur mandarin/acid lime cultivars during 2013-2016, abamectin was the most toxic insecticide for the initial year (LC50 values ranged from 20.99 to 49.00 ppm), while dimethoate (LC50 of 36.57-160.95 ppm) and thiamethoxam (39.90-71.96 ppm) were consistently effective against P. citrella larvae for the rest of the period. Resistance ratio (RR) values calculated based on the baseline susceptible culture, viz., abamectin (1.24-2.33), acephate (1.03-2.31), fenvalerate (1.54-3.45), dimethoate(1.28-5.63), imidacloprid (1.29-8.64), and thiamethoxam (1.05-1.80), indicated that the current RR values were in low levels (RR < 10).
[Mh] Termos MeSH primário: Proteção de Cultivos/métodos
Inseticidas/farmacologia
Mariposas/efeitos dos fármacos
[Mh] Termos MeSH secundário: Animais
Dimetoato/farmacologia
Imidazóis/farmacologia
Índia
Ivermectina/análogos & derivados
Ivermectina/farmacologia
Larva/efeitos dos fármacos
Neonicotinoides
Nitrilos/farmacologia
Nitrocompostos/farmacologia
Oxazinas/farmacologia
Piretrinas/farmacologia
Tiazóis/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Imidazoles); 0 (Insecticides); 0 (Neonicotinoids); 0 (Nitriles); 0 (Nitro Compounds); 0 (Oxazines); 0 (Pyrethrins); 0 (Thiazoles); 3BN7M937V8 (imidacloprid); 5U8924T11H (abamectin); 70288-86-7 (Ivermectin); 747IC8B487 (thiamethoxam); W6U08B045O (Dimethoate); Z6MXZ39302 (fenvalerate)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170324
[St] Status:MEDLINE
[do] DOI:10.1093/jee/tow311


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[PMID]:28334255
[Au] Autor:Sampson BJ; Marshall DA; Smith BJ; Stringer SJ; Werle CT; Magee DJ; Adamczyk JJ
[Ad] Endereço:USDA-ARS Thad Cochran Southern Horticultural Laboratory, 810 Hwy., 26 West, Poplarville, MS 39470 (blair.sampson@ars.usda.gov; Donna.Marshall@ars.usda.gov; barbara.smith@ars.usda.gov; stephen.stringer@ars.usda.gov; chris.werle@ars.usda.gov; daniel.magee@ars.usda.gov; John.Adamczyk@ars.usda.gov).
[Ti] Título:Erythritol and Lufenuron Detrimentally Alter Age Structure of Wild Drosophila suzukii (Diptera: Drosophilidae) Populations in Blueberry and Blackberry.
[So] Source:J Econ Entomol;110(2):530-534, 2017 Apr 01.
[Is] ISSN:1938-291X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:We report on the efficacy of 0.5 M (61,000 ppm) erythritol (E) in Truvia Baking Blend, 10 ppm lufenuron (L), and their combination (LE) to reduce egg and larval densities of wild populations of Drosophila suzukii (Matsumura) infesting fields of rabbiteye blueberries (Vaccinium virgatum) and blackberries (Rubus sp.). Formulations included the active ingredients (lufenuron, erythritol, or both), sugar (in control and erythritol treatments), and Dawn hand-soap applied to plants with pressurized 3-gallon garden spray tanks. The three chemical treatments (E, L, and LE) had no effect on D. suzukii ovipositing in blackberry and blueberry fruit, but they did reduce larval infestation by 75%, particularly densities of first and second instars. Erythritol and lufenuron were equally efficacious compounds as a D. suzukii ovicide and larvicide, but they did not display additive or synergistic activity. Extremely high larval mortality in control fruits show an age structure heavily skewed toward egg output.
[Mh] Termos MeSH primário: Benzamidas/farmacologia
Proteção de Cultivos/métodos
Drosophila/efeitos dos fármacos
Eritritol/farmacologia
[Mh] Termos MeSH secundário: Fatores Etários
Animais
Mirtilos Azuis (Planta)
Controle de Insetos
Mississippi
Óvulo/efeitos dos fármacos
Rubus
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Benzamides); 1R754M4918 (fluphenacur); RA96B954X6 (Erythritol)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170809
[Lr] Data última revisão:
170809
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170324
[St] Status:MEDLINE
[do] DOI:10.1093/jee/tow307


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[PMID]:28334171
[Au] Autor:Aigner BL; Kuhar TP; Herbert DA; Brewster CC; Hogue JW; Aigner JD
[Ad] Endereço:Department of Entomology, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0319 (baigner@vt.edu; tkuhar@vt.edu; herbert@vt.edu; carlyleb@vt.edu; hogue@vt.edu; daigner@vt.edu).
[Ti] Título:Brown Marmorated Stink Bug (Hemiptera: Pentatomidae) Infestations in Tree Borders and Subsequent Patterns of Abundance in Soybean Fields.
[So] Source:J Econ Entomol;110(2):487-490, 2017 Apr 01.
[Is] ISSN:1938-291X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The invasive brown marmorated stink bug, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), is an important pest of soybean (Glycine max L. Merr.) in the Mid-Atlantic United States. In order to assess the influence of nonmanaged wooded borders on H. halys infestation patterns in soybean, 12 soybean fields in Orange and Madison Counties, VA, were sampled each week from July to October in 2013 or 2014 for H. halys. At each location, five 2-min visual counts of H. halys life stages were made on tree of heaven (Ailanthus altissima Mill.) and other favorable host trees along a wooded border, on the adjacent soybean edge, 15 m into the soybean field, and 30 m into the field. Seasonal data showed a clear trend at all locations of H. halys densities building up on A. altissima-dominated wooded borders in July, then, gradually moving into adjacent soybean field edges later in the summer. Halyomorpha halys did not move far from the invading field edge, with approximately half as many bugs being present at 15 m into the field and very few being detected 30 m into the field. These results have implications for continued monitoring and management using field border sprays, particularly on edges adjacent to woods.
[Mh] Termos MeSH primário: Heterópteros/fisiologia
Feijão de Soja
Árvores
[Mh] Termos MeSH secundário: Ailanthus
Animais
Proteção de Cultivos/métodos
Espécies Introduzidas
Dinâmica Populacional
Estações do Ano
Virginia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170809
[Lr] Data última revisão:
170809
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170324
[St] Status:MEDLINE
[do] DOI:10.1093/jee/tox047


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[PMID]:28294993
[Au] Autor:Iriti M; Varoni EM
[Ad] Endereço:Department of Agricultural and Environmental Sciences, Milan State University, via G. Celoria 2, 20133 Milan, Italy. marcello.iriti@unimi.it.
[Ti] Título:Moving to the Field: Plant Innate Immunity in Crop Protection.
[So] Source:Int J Mol Sci;18(3), 2017 Mar 15.
[Is] ISSN:1422-0067
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:n/a.
[Mh] Termos MeSH primário: Proteção de Cultivos
Imunidade Inata
Plantas/imunologia
[Mh] Termos MeSH secundário: Interações Hospedeiro-Parasita
Interações Hospedeiro-Patógeno/imunologia
Doenças das Plantas/imunologia
[Pt] Tipo de publicação:EDITORIAL; LETTER
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170420
[Lr] Data última revisão:
170420
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170316
[St] Status:MEDLINE


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[PMID]:28282441
[Au] Autor:Alford A; Krupke CH
[Ad] Endereço:Department of Entomology, Purdue University, West Lafayette, Indiana, United States of America.
[Ti] Título:Translocation of the neonicotinoid seed treatment clothianidin in maize.
[So] Source:PLoS One;12(3):e0173836, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Neonicotinoid seed treatments, typically clothianidin or thiamethoxam, are routinely applied to >80% of maize (corn) seed grown in North America where they are marketed as a targeted pesticide delivery system. Despite this widespread use, the amount of compound translocated into plant tissue from the initial seed treatment to provide protection has not been reported. Our two year field study compared concentrations of clothianidin seed treatments in maize to that of maize without neonicotinoid seed treatments and found neonicotinoids present in root tissues up to 34 days post planting. Plant-bound clothianidin concentrations followed an exponential decay pattern with initially high values followed by a rapid decrease within the first ~20 days post planting. A maximum of 1.34% of the initial seed treatment was successfully recovered from plant tissues in both study years and a maximum of 0.26% was recovered from root tissue. Our findings show neonicotinoid seed treatments may provide protection from some early season secondary maize pests. However, the proportion of the neonicotinoid seed treatment clothianidin translocated into plant tissues throughout the growing season is low overall and this observation may provide a mechanism to explain reports of inconsistent efficacy of this pest management approach and increasing detections of environmental neonicotinoids.
[Mh] Termos MeSH primário: Proteção de Cultivos/métodos
Guanidinas/farmacocinética
Sementes/efeitos dos fármacos
Tiazóis/farmacocinética
Zea mays/efeitos dos fármacos
[Mh] Termos MeSH secundário: Animais
Transporte Biológico/efeitos dos fármacos
Coleópteros
Proteção de Cultivos/economia
Neonicotinoides
Raízes de Plantas/efeitos dos fármacos
Sementes/metabolismo
Zea mays/crescimento & desenvolvimento
Zea mays/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Guanidines); 0 (Neonicotinoids); 0 (Thiazoles); 2V9906ABKQ (clothianidin)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170311
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0173836



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